Answer is Option (3) for SSC MTS Chemistry MCQ

A standard dry cell comprises a zinc anode (negative pole), usually in the form of a cylindrical pot, with a carbon cathode (positive pole) in the form of a central rod. The electrolyte is ammonium chloride in the form of a paste next to the zinc anode. The remaining space between the electrolyte and carbon cathode is taken up by a second paste consisting of ammonium chloride and manganese dioxide, the latter acting as a depolariser.

Answer is Option (2) for SSC MTS Chemistry MCQ

Purified germanium is a semiconductor, with appearance most similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature. Unlike silicon, it is too reactive to be found naturally on Earth in the free (native) state.

Answer is Option (3) for SSC MTS Chemistry MCQ

Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that finds numerous applications. The best known brand name of PTFE is Teflon. PTFE is used as a non-stick coating for pans and other cookware as it is hydrophobic and possesses fairly high heat resistance.

Answer is Option (4) for SSC MTS Chemistry MCQ

Biogas or Gobar gas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops. It comprises primarily methane (CH₄) and carbon dioxide (CO₂) and may have small amounts of hydrogen sulphide (H₂ S), moisture and siloxanes.

Answer is Option (2) for SSC MTS Chemistry MCQ

Vinegar is a liquid substance consisting mainly of acetic acid (CH₃CO₂H) and water, the acetic acid being produced through the fermentation of ethanol by acetic acid bacteria. It is today mainly used in the kitchen as a general cooking ingredient, but historically, as the most easily available mild acid, it had a great variety of industrial, medical, and domestic uses.

Answer is Option (4) for SSC MTS Chemistry MCQ

Seaweed is a source of iodine, necessary for thyroid function and to prevent goitre. However, an excess of iodine is suspected in the heightened cancer risk in Japanese who consume a lot of the plant, and even bigger risks in post-menopausal women.

Answer is Option (3) for SSC MTS Chemistry MCQ

The fiber least prone to catch fire is cotton. Besides, in cases of fire due to electricity, cotton is less prone to static electricity buildup than nylon or other synthetics. Cotton and wool are naturally less prone to burning because the fire can be smothered in the thick fibers.

Answer is Option (2) for SSC MTS Chemistry MCQ

The setting of plaster of Paris takes place by hydration due to the formation of a solid crystalline hydrate and hardening of Plaster of Paris is hydration reaction, which is reverse of the dehydration of gypsum. Plaster of Paris quickly sets to a hard mass when made into a thin paste with water. A slight expansion takes place in the process and heat is evolved. This process is exothermic.

Answer is Option (1) for SSC MTS Chemistry MCQ

Sodium hydroxide, also known as lye or caustic soda, has the molecular formula NaOH and is a highly caustic metallic base. It is a white solid available in pellets, flakes, granules, and as a 50% saturated solution. It is used in many industries, mostly as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner.

Answer is Option (2) for SSC MTS Chemistry MCQ

Calcium is one component of the most common type of human kidney stones, calcium oxalate. Some studies suggest people who take supplemental calcium have a higher risk of developing kidney stones, and these findings have been used as the basis for setting the recommended daily intake for calcium in adults.

Answer is Option (3) for SSC MTS Chemistry MCQ

Bone ash is a white material produced by the calcination of bones. It is primarily composed of calcium phosphate. It is commonly used in fertilizers, polishing compounds and in making ceramics such as bone china. It also has historical uses in the manufacture of baking powders and assay cupels.

Answer is Option (2) for SSC MTS Chemistry MCQ

Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined. A well known but minor use is as a lifting gas in balloons and airships.

Answer is Option (3) for SSC MTS Chemistry MCQ

The gold content of alloys is measured in carats (k). Pure gold is designated as 24k where the ratio of pure gold is supposed to be 100 per cent. So 18 k gold will have pure gold ratio of 75 per cent.

Answer is Option (2) for SSC MTS Chemistry MCQ

The stomach is famous for its secretion of hydrochloric acid. It is secreted from parietal cells into the lumen where it establishes an extremely acidic environment. This acid is important for activation of pepsinogen and inactivation of ingested microorganisms such as bacteria.

Answer is Option (2) for SSC MTS Chemistry MCQ

Calcium sulfate is a common laboratory and industrial chemical. In the form of -anhydrite (the nearly anhydrous form), it is used as a desiccant. It is also used as a coagulant in products like tofu. The main sources of calcium sulfate are naturally occurring gypsum and anhydrite which occur at many locations worldwide as evaporates.

Answer is Option (33) for SSC MTS Chemistry MCQ

Slag is a partially vitreous by-product of the process of smelting ore, which separates the desired metal fraction from the unwanted fraction. A good example is steelmaking slag: quicklime and magnesite are introduced for refractory protection, neutralizing the alumina and silica separated from the metal, and assist in the removal of sulfur and phosphorus from the steel.

Answer is Option (1) for SSC MTS Chemistry MCQ

In order to give more strength and more elasticity, natural rubber is heated with sulphur or sulphur compounds at 150°C temperature. Vulcanized rubber has good tensile strength. The working temperature of vulcanized rubber is enhanced up to 100°C. It has good resistance to organic solvents.

Answer is Option (3) for SSC MTS Chemistry MCQ

In metallurgy, stainless steel is defined as a steel alloy with a minimum of 10.5 per cent to 11 per cent chromium content by mass. There are different types of stainless steels: when nickel is added, for instance, the austenite structure of iron is stabilized. This crystal structure makes such steels virtually non-magnetic and less brittle at low temperatures. For greater hardness and strength, more carbon is added.

Answer is Option (1) for SSC MTS Chemistry MCQ

Oxalic acid is a reducing agent and its conjugate base, known as oxalate (C₂O4^2– ), is a chelating agent for metal cations. Oxalic acid’s main applications include cleaning or bleaching, especially for the removal of rust, e.g. Bar Keepers Friend is an example of a household cleaner containing oxalic acid. Its utility in rust removal agents is due to its forming a stable, water soluble salt with ferric iron, ferrioxalate ion.

Answer is Option (1) for SSC MTS Chemistry MCQ

Phosphoric acid was the foundation of the softdrink industry, long before Coca-Cola’s popularity Phosphoric acid is deliberately added to soft drinks to give them a sharper flavor. It also slows the growth of molds and bacteria, which would otherwise multiply.

Answer is Option (3) for SSC MTS Chemistry MCQ

Galvanization is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting. Although galvanization can be done with electrochemical and electro-deposition processes, the most common method in current use is hot-dip galvanization, in which steel parts are submerged in a bath of molten zinc.

Answer is Option (4) for SSC MTS Chemistry MCQ

The basic calorific value for solid and liquid fuels is the gross calorific value at constant volume and for gaseous fuels it is the gross calorific value at constant pressure. The calorific value in Kcal/Kg: Coal: 4000- 7000; Natural gas: 8600; Coal gas: 4000; Water gas: 4600-4800; and LPG (liquefied petroleum gas such as Indane): 11,900 Kcal/Kg.

Answer is Option (4) for SSC MTS Chemistry MCQ

The Troposphere is the layer where the weather happens. Above this layer is the Stratosphere and in between them is the Ozone layer that absorbs the sun’s harmful ultraviolet rays. Above the Stratosphere is the Mesosphere, the Thermosphere including the Ionosphere – and the Exosphere.

Answer is Option (4) for SSC MTS Chemistry MCQ

Biomass is biological material from living, or recently living organisms, most often referring to plants or plant-derived materials. As a renewable energy source, biomass can either be used directly, or indirectly — once or converted into another type of energy product such as biofuel. Biomass can be converted to energy in three ways: thermal conversion, chemical conversion, and biochemical conversion.

Answer is Option (2) for SSC MTS Chemistry MCQ

Copper is one of very few elements that are found in essentially pure form in nature. But the bulk of the copper resource is found in other minerals.

Answer is Option (1) for SSC MTS Chemistry MCQ

Overflow of water or water stagnation damage tar roads. Water which penetrates the surface can get into the base course to cause trouble, and at the same time start oxidizing the binder inside the pavement.

Answer is Option (1) for SSC MTS Chemistry MCQ

Cannabis, also known as marijuana is a preparation of the Cannabis plant intended for use as a psychoactive drug and as medicine. Cannabis indica is known for sedative effects and preferred night time as medical cannabis.

Answer is Option (1) for SSC MTS Chemistry MCQ

Terylene is the name for a synthetic polyester fibre. It is a synthetic polyester fibre or fabric based on terephthalic acid, characterized by lightness and crease resistance and used for clothing, sheets, ropes, sails, etc.

Answer is Option (4) for SSC MTS Chemistry MCQ

The calorific values of different fuels (in Kcal/kg) in dry state are: Wood: 3500; Coal: 4000-7000; Coke: 6500; and Natural Gas: 8600 Kcal/kg.

Answer is Option (1) for SSC MTS Chemistry MCQ

Embalming fluids use formaldehyde as a preservative. Formaldehyde is the simplest aldehyde with the chemical formula HCHO. Formalin is a solution of formaldehyde in water, usually with a small amount of methanol added. Modern formaldehyde based embalming fluids are much kinder to the environment than those used in previous years.

Answer is Option (2) for SSC MTS Chemistry MCQ

All elements will be monatomic in the gas phase at sufficiently high temperatures. At standard temperature and pressure (STP), all of the noble gases are monatomic. These are helium, neon, argon, krypton, xenon and radon. Monatomic hydrogen comprises about 75% of the elemental mass of the universe.

Answer is Option (2) for SSC MTS Chemistry MCQ

Baking Soda is Sodium bicarbonate or sodium hydrogen carbonate. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, soda bread, and other baked and fried foods.

Answer is Option (4) for SSC MTS Chemistry MCQ

A fossil fuel, coal forms when dead plant matter is converted into peat, which in turn is converted into lignite, then sub-bituminous coal, after that bituminous coal, and lastly anthracite. This involves biological and geological processes that take place over a long period.

Answer is Option (2) for SSC MTS Chemistry MCQ

Vaseline is a brand of petroleum jelly based products owned by Anglo-Dutch company Unilever. While Vaseline can be used as a lubricant, it is also a useful moisture insulator for local skin conditions characterized by tissue dehydration. Vaseline helps protect minor cuts and burns.

Answer is Option (4) for SSC MTS Chemistry MCQ

A flame test is performed by introducing a sample into the blue flame of a bunsen burner and noting any change in the colour of the flame. The tests can be used to detect the presence of some metallic elements in salts. With strontium salt, the colour of Bunsen flame ranges from crimson to red.

Answer is Option (1) for SSC MTS Chemistry MCQ

The Iodine test is used to test for the presence of starch. Iodine solution — iodine dissolved in an aqueous solution of potassium iodide — reacts with the starch producing a purple black colour.

Answer is Option (2) for SSC MTS Chemistry MCQ

Tear gas, formally known as a lachrymatory agent, is a possibly lethal chemical weapon that stimulates the corneal nerves in the eyes to cause tears, pain, and even blindness. The compound 2- chlorobenzalmalononitrile (chemical formula: C₁₀H₅ ClN₂ ), is the defining component of a “tear gas” commonly referred to as CS gas, which is used as a riot control agent.

Answer is Option (1) for SSC MTS Chemistry MCQ

Magnesium sulfate is an inorganic salt (chemical compound) containing magnesium, sulfur and oxygen which is commonly called Epsom Salt. Because like other salts, it withdraws water from cells, Epsom salt is used as a fast-acting purgative in some types of poisoning, to draw water into the intestines, thus, reducing constipation; to withdraw toxins from the body; and to draw fluid from the brain in cases of cerebral edema.

Answer is Option (4) for SSC MTS Chemistry MCQ

Common refrigerants used in domestic refrigerators are freon, neon and nitrogen. It flows through four components of refrigerator again and again. These four components are cooling chamber, compressor, heat exchanger and expander.

Answer is Option (4) for SSC MTS Chemistry MCQ

Nitrous oxide, commonly known as laughing gas, is a chemical compound with the formula N2O. It is used in surgery and dentistry for its anesthetic and analgesic effects. It is known as “laughing gas” due to the euphoric effects of inhaling it, a property that has led to its recreational use as a dissociative anesthetic.

Answer is Option (2) for SSC MTS Chemistry MCQ

Brass is an alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties. By comparison, bronze is principally an alloy of copper and tin. Bronze does not necessarily contain tin, and a variety of alloys of copper, including alloys with arsenic, phosphorus, aluminium, manganese, and silicon, are commonly termed “bronze”.

Answer is Option (4) for SSC MTS Chemistry MCQ

Zinc phosphide is used as a rodenticide. A mixture of food and zinc phosphide is left where the rodents can eat it. The acid in the digestive system of the rodent reacts with the phosphide to generate the toxic phosphine gas.

Answer is Option (1) for SSC MTS Chemistry MCQ

Haematite is the mineral form of iron oxide (Fe₂O₃), one of several iron oxides. It is mined as the main ore of iron. Hematite is harder than pure iron, but much more brittle.

Answer is Option (3) for SSC MTS Chemistry MCQ

Common refrigerants used in domestic refrigerators are Freon, neon and nitrogen. It flows through four components of refrigerator again and again.

Answer is Option (1) for SSC MTS Chemistry MCQ

Denatured alcohol is ethanol that has additives to make it undrinkable (poisonous), to discourage recreational consumption. Different additives are used to make it difficult to use distillation or other simple processes to reverse the denaturation. Methanol is commonly used both because its boiling point is close to that of ethanol and because it is toxic.

Answer is Option (3) for SSC MTS Chemistry MCQ

A special characteristic of animal charcoal is its power to remove substances from solution. A brown solution of raw sugar is decolourized when boiled with animal charcoal. Other substances that are similarly removed from solution are indigo, litmus, iodine, the colouring-matter of red wine, the brown matter of peaty water or sewage, astringent principles, and certain basic salts, etc.

Answer is Option (3) for SSC MTS Chemistry MCQ

A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in the Earth’s atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

Answer is Option (4) for SSC MTS Chemistry MCQ

Radiocarbon dating (usually referred to as simply carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 ( ¹⁴C) to estimate the age of carbon-bearing materials up to about 58,000 to 62,000 years. After plants die or they are consumed by other organisms (for example, by humans or other animals), the incorporation of all carbon isotopes, including ¹⁴C, stops. Thereafter, the concentration (fraction) of ¹⁴C declines at a fixed exponential rate due to the radioactive decay of ¹⁴C.

Answer is Option (1) for SSC MTS Chemistry MCQ

Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, with other hydrocarbons, carbon dioxide, nitrogen and hydrogen sulfide. It is found in deep underground natural rock formations or associated with other hydrocarbon reservoirs in coal beds and as methane clathrates. Petroleum is also another resource found in proximity to and with natural gas.

Answer is Option (2) for SSC MTS Chemistry MCQ

Domestic gas is another name for Liquefied Petroleum Gas (LPG). Varieties of LPG bought and sold include mixes that are primarily propane (C₃H₈), primarily butane (C₄H₁₀) and, most commonly, mixes including both propane and butane, depending on the season — in winter more propane, in summer more butane.

51. Chemically ‘Quick Silver is known as

(1) Mercury

(2) Silver

(3) Gold

(4) Copper

Show Answer

Answer is Option (1) for SSC MTS Chemistry MCQ

Quicksilver is an alternative name for the element mercury. A heavy, silvery d-block element, mercury is the only metal that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine, though metals such as caesium, gallium, and rubidium melt just above room temperature.

Answer is Option (2) for SSC MTS Chemistry MCQ

More than 90% of world production of urea is destined for use as a nitrogen-release fertilizer. Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use. Therefore, it has the lowest transportation costs per unit of nitrogen nutrient.

Answer is Option (1) for SSC MTS Chemistry MCQ

Galvanization is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting. Although galvanization can be done with electrochemical and electro-deposition processes, the most common method in current use is hot-dip galvanization, in which steel parts are submerged in a bath of molten zinc.

Answer is Option (2) for SSC MTS Chemistry MCQ

For some diving, gas mixtures other than normal atmospheric air (21% oxygen, 78% nitrogen, 1% trace gases) can be used, so long as the diver is properly trained in their use. The most commonly used mixture is Nitrox, also referred to as Enriched Air Nitrox (EAN), which is air with extra oxygen, often with 32% or 36% oxygen, and thus less nitrogen, reducing the likelihood of decompression sickness or allowing longer exposure to the same pressure for equal risk.

Answer is Option (1) for SSC MTS Chemistry MCQ

Circling around outside the nucleus are tiny little particles called electrons. Electrons have a negative charge. Electrons spin as they circle the nucleus billions of times every second. They are arranged in energy levels around the nucleus. When electrons gain or lose energy, they jump between energy levels as they are rotating around the nucleus.

Answer is Option (1) for SSC MTS Chemistry MCQ

Gold is the least reactive in the reactivity series. Since it does not react with other elements, it is found in a free form. Only gold, silver, copper and the platinum metals occur in nature in larger amounts. Non-metallic elements occurring in the native state include carbon and sulfur.

Answer is Option (1) for SSC MTS Chemistry MCQ

Diamond is one well known allotrope of carbon. The hardness and high dispersion of light of diamond make it useful for both industrial applications and jewellery. Diamond is the hardest known natural mineral. This makes it an excellent abrasive and makes it hold polish and luster extremely well.

Answer is Option (1) for SSC MTS Chemistry MCQ

A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ethane. The manufacture of such compounds has been phased out (and replaced with products such as R-410A) by the Montreal Protocol because they contribute to ozone depletion in the upper atmosphere.

Answer is Option (3) for SSC MTS Chemistry MCQ

Nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei), often producing free neutrons and photons (in the form of gamma rays), and releasing a very large amount of energy, even by the energetic standards of radioactive decay. Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron.

Answer is Option (1) for SSC MTS Chemistry MCQ

A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. The primary greenhouse gases in the Earth’s atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

Answer is Option (3) for SSC MTS Chemistry MCQ

In order to give more strength and more elasticity, natural rubber is heated with sulphur or sulphur compounds at 150°C temperature. Vulcanized rubber has good tensile strength.

Answer is Option (3) for SSC MTS Chemistry MCQ

More than 90% of world production of urea is destined for use as a nitrogen-release fertilizer. Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use.

Answer is Option (3) for SSC MTS Chemistry MCQ

A battery is a form of chemical energy that can be converted to electrical energy. it is a device consisting of one or more electrochemical cells which performs this action. The first battery (or “voltaic pile”) was invented in 1800 by Alessandro Volta.

Answer is Option (1) for SSC MTS Chemistry MCQ

Nuclear power is now used in all large submarines, but due to the high cost and large size of nuclear reactors, smaller submarines still use diesel-electric propulsion. The ratio of larger to smaller submarines depends on strategic needs. The US Navy, French Navy, and the British Royal Navy operate only nuclear submarines.

Answer is Option (1) for SSC MTS Chemistry MCQ

Isoprene was first isolated by thermal decomposition of natural rubber. About 95% of isoprene production is used to produce cis-1,4- polyisoprene—a synthetic version of natural rubber. Natural rubber consists mainly of poly-cis-isoprene with a molecular weight of 100,000 to 1,000,000.

Answer is Option (2) for SSC MTS Chemistry MCQ

Polystyrene is a synthetic aromatic polymer made from the monomer styrene, a liquid petrochemical. It is one of the most widely used plastics. Uses include protective packaging (such as packing peanuts and CD and DVD cases), containers (such as “clamshells”), lids, bottles, trays, tumblers, and disposable cutlery.

Answer is Option (3) for SSC MTS Chemistry MCQ

Vinegar is a liquid substance consisting mainly of acetic acid (CH₃ CO₂H) and water, the acetic acid being produced through the fermentation of ethanol by acetic acid bacteria. It is today mainly used in the kitchen as a general cooking ingredient.

Answer is Option (3) for SSC MTS Chemistry MCQ

Corrosion is an oxidation reaction with atmospheric oxygen in the presence of water on the surface of a metal. Iron corrodes more quickly than most other transition metals to form an iron oxide. Aluminium also undergoes an oxidation reaction, but does not oxidize and corrode as quickly as its reactivity suggests. Once a thin oxide layer of Al₂O₃ has formed on the surface, it forms a barrier to oxygen and water to prevent further corrosion of the aluminium.

Answer is Option (2) for SSC MTS Chemistry MCQ

Early submarines used a direct mechanical connection between the engine and propeller, switching between diesel engines for surface running, and electric motors for submerged propulsion. Diesel- electric submarines have a stealth advantage over their nuclear counterparts.

Answer is Option (3) for SSC MTS Chemistry MCQ

The Bhopal disaster occurred on the night of 2–3 December 1984 at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh. Over 500,000 people were exposed to methyl isocyanate gas and other chemicals. The toxic substance made its way in and around the shantytowns located near the plant.

Answer is Option (1) for SSC MTS Chemistry MCQ

The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO) and volatile organic compounds (VOCs), such as xylene, react in the atmosphere in the presence of sunlight containing ultra violet rays. NOx, CO, and VOCs are called ozone precursors.

CO + 2O₂ + CO₂ +O₃

Answer is Option (1) for SSC MTS Chemistry MCQ

Molasses are the principal ingredient in the distillation of rum. Rum is therefore common in regions of the world where sugarcane or sugar beets are heavily cultivated. It is used in the manufacture of ethyl alcohol for industry and as an ingredient in cattle feed.

Answer is Option (2) for SSC MTS Chemistry MCQ

Silver Nitrate is stored in dark bottles in a laboratory to prevent chemical reactions as it is sensitive to light. It reacts to light to produce silver metal.

Answer is Option (2) for SSC MTS Chemistry MCQ

Sulfuric acid is produced from sulfur, oxygen and water via the conventional contact process (DCDA) or the wet sulfuric acid process (WSA). Sulfuric acid can be produced in the laboratory by burning sulfur in air and dissolving the gas produced in a hydrogen peroxide solution.

SO₂ + H₂O₂ → H₂ SO₄

Answer is Option (4) for SSC MTS Chemistry MCQ

Most pencil cores are made of graphite mixed with a clay binder, leaving grey or black marks that can be easily erased. Graphite pencils are used for both writing and drawing, and the result is durable: although writing can usually be removed with an eraser, it is resistant to moisture, most chemicals, ultraviolet radiation and natural aging.

Answer is Option (3) for SSC MTS Chemistry MCQ

Tin/lead solders, also called soft solders, are commercially available with tin concentrations between 5% and 70% by weight. The greater the tin concentration, the greater the solder’s tensile and shear strengths. Alloys commonly used for electrical soldering are 60/40 Tin/lead (Sn/Pb) which melts at 370 °F or 188 °C and 63/37 Sn/Pb used principally in electrical/electronic work.

Answer is Option (1) for SSC MTS Chemistry MCQ

A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. Semiconductor material (date first used): the metalloids germanium (1947) and silicon (1954) — in amorphous, polycrystalline and mono-crystalline form; the compounds gallium arsenide (1966) and silicon carbide (1997), the alloy silicon-germanium (1989), the allotrope of carbon graphene (research ongoing since 2004), etc.

Answer is Option (4) for SSC MTS Chemistry MCQ

The Sun is a main-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. Nuclear fusion is a nuclear reaction in which two or more atomic nuclei join together, or “fuse”, to form a single heavier nucleus. During this process, matter is not conserved because some of the mass of the fusing nuclei is converted to photons which are released through a cycle that even our sun uses.

Answer is Option (2) for SSC MTS Chemistry MCQ

Gelatine, being a colloid, has the property of preventing crystallization. In ice lollies and ice-cream this is demonstrated by the formation of a very fine crystal structure on freezing. This goes much further in that gelatine stabilized ice-cream does not become grainy or sandy due to the slow crystallisation of lactose with time.

Answer is Option (1) for SSC MTS Chemistry MCQ

Oxalic acid is a reducing agent and its conjugate base, known as oxalate (C₂O₂ ^–2), is a chelating agent for metal cations and stain removal. Oxalic acid’s main applications include cleaning or bleaching, removal of stains on clothes and the removal of rust.

Answer is Option (1) for SSC MTS Chemistry MCQ

The carbon-hydrogen bond (C-H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. Compound classes consisting solely of C-H bonds and C-C bonds are alkanes, alkenes, alkynes, and aromatic hydrocarbons. Collectively they are known as hydrocarbons.

Answer is Option (1) for SSC MTS Chemistry MCQ

Heliox is a breathing gas composed of a mixture of helium (He) and oxygen (O₂ ). Heliox has been used medically since the 1930s, and although the medical community adopted it initially to alleviate symptoms of upper airway obstruction, its range of medical uses has since expanded greatly, mostly because of the low density of the gas.

 Answer is Option (2) for SSC MTS Chemistry MCQ

Carbon monoxide (CO) is a colourless, odorless, non-irritating but very poisonous gas which is a product by incomplete combustion of fuel such as natural gas, coal or wood. Vehicular exhaust is a major source of carbon monoxide.

Answer is Option (3) for SSC MTS Chemistry MCQ

Yeasts are eukaryotic microorganisms classified in the kingdom Fungi. By fermentation, the yeast species Saccharomyces cerevisiae converts carbohydrates to carbon dioxide and alcohols – for thousands of years the carbon dioxide has been used in baking and the alcohol in alcoholic beverages.

Answer is Option (3) for SSC MTS Chemistry MCQ

Aqua regia or nitro-hydrochloric acid is a highly corrosive mixture of acids, a fuming yellow or red solution. It was named so because it can dissolve the so-called royal or noble metals, gold and platinum.

Answer is Option (2) for SSC MTS Chemistry MCQ

Silver bromide, a soft, pale-yellow, water insoluble salt well known for its unusual sensitivity to light. This property has allowed silver halides to become the basis of modern photographic materials.

Answer is Option (4) for SSC MTS Chemistry MCQ

Titanium is the hardest natural metal in the world. It is very strong, three times the strength of steel and much stronger than gold, silver and platinum and yet is very light weight. Tungsten carbide is the hardest metal alloy on Earth and is scratch proof under normal wear. Tungsten carbide is two times as hard as steel and four times as hard as titanium.

Answer is Option (1) for SSC MTS Chemistry MCQ

One end of a match is coated with a material that can be ignited by frictional heat generated by striking the match against a suitable surface. The coated end of a match, known as the match “head,” contains either phosphorus or phosphorus sesquisulfide as the active ingredient and gelatin as a binder.

Answer is Option (3) for SSC MTS Chemistry MCQ

The main source of Naphthalene is coal-tar. Naphthalene is derived from a kind of naphtha which is a broad term encompassing any volatile, flamable liquid hydrocarbon mixture, including coal-tar.

Answer is Option (2) for SSC MTS Chemistry MCQ

A solar cell (also called a photovoltaic cell) is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect. Materials presently used for photovoltaic solar cells include mono-crystalline silicon, polycrystalline silicon, amorphous silicon, cadmium telluride, and copper indium selenide/sulfide.

Answer is Option (3) for SSC MTS Chemistry MCQ

Quartz is made up of a continuous framework of SiO₄ silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO₄ . Tridymite and cristobalite are high temperature polymorphs of SiO₄ that occur in high silica volcanic rocks. Coesite is a denser polymorph of quartz found in some meteorite impact sites and in metamorphic rocks.

Answer is Option (3) for SSC MTS Chemistry MCQ

When baking soda and lemon juice are added together, the reaction of the two is an acid-based reaction because it involves an acid (citric acid in the lemon juice) reacting with a base (sodium bicarbonate, more commonly known as baking soda). Carbon dioxide, a gas, is produced by the reaction.

93. Which of the following is a super-cooled liquid?

(1) Ice-cream

(2) Ammonia

(3) Glass

(4) Wood

Show Answer

 Answer is Option (3) for SSC MTS Chemistry MCQ

Glass is considered to be a super-cooled liquid due to its lack of a first-order phase transition where certain thermodynamic variables such as volume, entropy and enthalpy are discontinuous through the glass transition range. However, the glass transition may be described as analogous to a second-order phase transition where the intensive thermodynamic variables such as the thermal expansivity and heat capacity are discontinuous.

Answer is Option (4) for SSC MTS Chemistry MCQ

Fertilizers typically provide, in varying proportions: (i) six macronutrients: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sulfur (S); and (ii) eight micronutrients: boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), zinc (Zn) and nickel (Ni).

95. In the electroplating of gold, the electrolyte used is

(1) Gold chloride

(2) Gold nitrate

(3) Gold sulphate

(4) Potassium aurocyanide

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Answer is Option (3) for SSC MTS Chemistry MCQ

Gold plating is a method of depositing a thin layer of gold onto the surface of another metal, most often copper or silver (to make silver-gilt), by chemical or electrochemical plating. Electroplating of gold is done using a sulphate/sulfite based electrolyte. This product is environment- and user friendly and moreover the electroplating rate is good.

Answer is Option (4) for SSC MTS Chemistry MCQ

Formic acid is the simplest carboxylic acid. It is an important intermediate in chemical synthesis and occurs naturally, most notably in the venom of bee and ant stings. In fact, its name comes from the Latin word for ant, Formica, referring to its early isolation by the distillation of ant bodies.

Answer is Option (4) for SSC MTS Chemistry MCQ

Bauxite is an aluminium ore and is the main source of aluminium. Approximately 70% to 80% of the world’s dry bauxite production is processed first into alumina, and then into aluminium by electrolysis as of 2010. Usually, bauxite ore is heated in a pressure vessel along with a sodium hydroxide solution at a temperature of 150 to 200 °C. At these temperatures, the aluminium is dissolved as an aluminate (the Bayer process).

Answer is Option (4) for SSC MTS Chemistry MCQ

In chemistry, pH is a measure of the activity of the (solvated) hydrogen ion. P [H], which measures the hydrogen ion concentration is closely related to, and is often written as, pH. Pure water has a pH very close to 7 at 25°C. Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline. A pH of 7 is treated as neutral.

Answer is Option (1) for SSC MTS Chemistry MCQ

Galvanization is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting. In current use, the term refers to the coating of steel or iron with zinc. This is done to prevent rusting of the ferrous item. The value of galvanizing stems from the corrosion resistance of zinc, which, under most service conditions, is considerably greater than that of iron and steel.

Answer is Option (3) for SSC MTS Chemistry MCQ

The first modern photoflash bulb (or flashbulb) was made by Austrian Paul Vierkotter, who used magnesium coated wire in an evacuated glass globe. It was later determined that aluminum foil in a low pressure oxygen atmosphere worked even better, and was cheaper to produce.