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SSC CGL Exam  >  SSC CGL Tests  >  SSC CGL Previous Year Papers  >  Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - SSC CGL MCQ

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - SSC CGL MCQ


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30 Questions MCQ Test SSC CGL Previous Year Papers - Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 for SSC CGL 2024 is part of SSC CGL Previous Year Papers preparation. The Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 questions and answers have been prepared according to the SSC CGL exam syllabus.The Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 MCQs are made for SSC CGL 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 below.
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Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 1
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Which mineral salt is dissolved in major amount in ocean water?
[SSC CHSL 03/08/2023 (2nd shift)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 1
Sodium chloride (NaCl). It is also known as table salt. Commonly used as a condiment and food preservative. Some of the minerals that are found in the ocean water - Chloride, Sodium, Magnesium, Sulphur, Calcium, Bromine, etc. About 97% of the Earth’s surface is found in Ocean.
Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 2
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Which sodium compound is the most popular additive to various items such as sauces, salad dressings, and beverages for its preservative action?
[SSC CGL 17/07/2023 (3rd shift)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 2

Sodium benzoate (C6H5COONa). Also known as benzoate of soda, a white crystalline chemical used in foods, such as soda, lemon juice, pickles, jelly, salad dressing, soy sauce. Sodium bicarbonate (NaHCO3), also known as baking soda used in cooking, disinfectant, pest control, teeth hygiene, indigestion. Sodium fluoride (NaF) a colourless or white solid that is readily soluble in water. It is soluble in water. Sodium hypochlorite (NaClO) : An inorganic chemical compound used as a disinfecting agent.

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Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 3
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Which compound is used to remove the skins from tomatoes, potatoes and other fruits and vegetables for canning and as an ingredient in food preservatives that helps prevent mould and bacteria from growing in food?
[Matric Level 27/06/2023 (Shift - 2)]

Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 3

Sodium hydroxide (NaOH) - It is a strong base and also known as caustic soda or lye. Magnesium bisulphite Mg(HSO3)2 is commonly used in the food industry as a preservative and antioxidant to prevent spoilage and discoloration in food products. Aluminium phosphide (AlP) is used as a fumigant (It reacts with water or acids to release phosphine gas) to control pests.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 4
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Which among the following gases is used as an anaesthetic in dental surgery.
[SSC MTS 04/05/2023 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 4

Nitrous Oxide (N2O). Radon (Rn, Atomic Number - 86) - An odourless, invisible, radioactive gas used in Cancer therapy. Argon (Ar, Atomic Number - 18) - Third-most abundant gas in Earth's atmosphere used in Electrical Light Bulbs. Helium (He, Atomic Number - 2) - Helium-oxygen (heliox) mixtures are used as a breathing medium during deep dives.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 5
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Silicon dioxide is found mostly in which of the following?
[SSC CHSL 13/03/2023 (3rd Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 5

Sand. Slaked lime or calcium hydroxide, Ca(OH)2 : Soluble in glycerol, high melting point (580° C), used in the paper industry, Pesticides. Silicon Dioxide or Silica, (SiO2) : Major constituent of Sand, used in food additives.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 6
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In what form is the energy derived from the food that we eat is stored in our body?
[SSC CGL 01/12/2022 (3rd Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 6

Glycogen (polysaccharide of glucose ; C24H42O21). Maltose (C12H22O11) is a disaccharide consisting of two units of glucose. Glucose (C6H12O6) is a simple sugar monosaccharide having two isoforms, alpha and beta. Starch {(C6H10O5)n} is a polysaccharide produced by most green plants for energy storage.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 7
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Which of the following are food preservatives?
[SSC CGL 07/12/2022 (3rd Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 7

Sugar, salt (NaCl), sodium nitrite (NaNO2), butylated hydroxy anisole (C11H16O2), butylated hydroxytoluene (C15H24O), tert-butylhydroquinone (C10H14O2), vinegar (CH3COOH), citric acid (C6H8O7), spices, and calcium propionate (C6H10CaO4) are all chemicals that preserve foods.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 8
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Which is the most popular coal in commercial use?
[SSC CGL 07/12/2022 (1st Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 8

Bituminous coal (Dark brown, 45–86%). This coal is reviewed based on versatility, dampness substance, instability and cinder content. Other types of coal: Peat ( precursor of coal, 40% carbon), Lignite (25–35%, brown coal), Anthracite (86–97% carbon).

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 9
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Which of the following is used in photography?
[SSC CGL 05/12/2022 (1st Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 9

Sodium thiosulphate (Na2S2O3) is used in photography to remove undecomposed AgBr as a soluble silver thiosulphate complex. It is also an antidote against cyanide poisoning and used for dechlorination of small water bodies like ponds and aquariums.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 10
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The lead chromate, which is toxic and carcinogenic, is used for the adulteration of __________ powder.
[SSC CPO 10/11/2022 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 10

Turmeric. Lead(II) chromate (PbCrO4) is carcinogenic (causes cancer). Food adulteration can be dened as the contamination or adulteration of food or food materials by adding harmful substances to it. Allicin compound (garlic's aroma). Phenolic compounds in ginger are gingerols, shogaols, and paradols. Capsaicin is a component of chili peppers. Turmeric bright yellow colour is due to the presence of curcumin.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 11
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Mozzarella, cheddar, and camembert are varieties of:
[Higher Secondary 03/08/2022 (Shift - 4)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 11

Cheese. Types of Bread :- Sourdough, Baguette, Brioche, Focaccia, Pita, Whole-Grain, Challah, Naan etc. Types of Yogurt :- Skyr/Icelandic, Lactose-free, Australian etc.
Types of vinegar :- Apple Cider, Red and White Vinegar, Balsamic, Malt etc.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 12
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Eugenol is a major component of:
[Higher Secondary 04/08/2022 (Shift - 3)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 12

Clove essential oil. It is an aromatic oil extracted from cloves that is used widely as a avouring for foods and to treat toothache.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 13
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Starch in potatoes reacts with _____, turning to a blue colour.
[SSC MTS 12/07/2022 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 13

Iodine. The group 17 elements include uorine(F), chlorine(Cl), bromine (Br), iodine(I) and astatine(At) from the top to the bottom. They are called “halogens” because they give salts when they react with metals.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 14
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Which vegetable contains a chemical called anthocyanin that turns pink/reddish in the presence of acid, turns purple when neutral and turns blue or green when mixed with alkaline substances?
[SSC CHSL 24/05/2022 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 14

Red Cabbage. Dietary sources of anthocyanins are generally easy to identify due to their red, blue, or purple color. Examples include red /purple cabbage, berries and red-skinned grapes, pears, and apples and various vegetables such as radishes etc. Purple fruits and vegetables are high in anthocyanin.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 15
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Which inorganic compound is used to manufacture soap, rayon, paper, explosives, dyes, and petroleum products?
[SSC CHSL 25/05/2022 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 15

NaOH (Sodium Hydroxide) . Sodium chlorite (NaClO2) is a chemical compound used in the manufacturing of paper and as a disinfectant. Calcium hypochlorite Ca(ClO)2 is the main active ingredient of commercial products called bleaching powder, chlorine powder, or chlorinated lime, used for water treatment and as a bleaching agent.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 16
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Which of the following compounds in petroleum can cause corrosion to parts of internal combustion engines and reneries?
[SSC CGL 11/04/2022 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 16

Sulphur is used in the vulcanisation of black rubber, as a fungicide and in black gunpowder.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 17
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Synthetic fibres catch fire easily. However, the uniforms of firemen have a coating of ______ plastic to make them flame resistant.
[SSC MTS 07/10/2021 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 17

Melamine. It is also used in airplanes, buses, etc. to prevent the spread of fire.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 18
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Whitewashed walls appear to be shiny after three to four days due to the formation of:
[SSC MTS 20/10/2021 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 18

Calcium carbonate (CaCO3) (also known as chalk), mined as calcite, is the most commonly used filler for PVC.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 19
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Which British scientist is known for developing the principle of holography in 1947 to improve the resolution of the electron microscope?
[SSC CPO 03/10/2023 (Afternoon)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 19
Dennis Gabor. Holography - It is a method of creating a unique photographic image without the use of a lens. Electron microscope - A microscope that uses a beam of electrons as a source of illumination.
Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 20
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In which year did Albert Einstein predict a new state of matter, the Bose-Einstein condensate (BEC), based on a quantum formulation by the Indian physicist Satyendra Nath Bose?
[SSC CPO 04/10/2023 (Morning)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 20
1924. Bose-Einstein condensates are described as the fifth state of matter, alongside solids, liquids, gases, and plasmas. This matter occurs when particles (bosons) are cooled to near absolute zero (-273.15 degrees Celsius, or -460 degrees Fahrenheit). Discoveries of Albert Einstein: Theory of Relativity, Photoelectric Effect, Mass-Energy Equivalence (E = mc²).
Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 21
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Which scientist synthesized an organic compound, urea, from an inorganic compound, ammonium cyanate?
[SSC CPO 04/10/2023 (Evening)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 21

F Wohler. Urea, also known as carbamide, is an organic compound with the chemical formula CO(NH2)2.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 22
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With which scientist did William Ramsay show in 1894 that air also contained an element unknown until then, which was named Argon?
[SSC CHSL 02/08/2023 (2nd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 22

Lord Rayleigh. Hermann Staudinger - A German organic chemist who demonstrated the existence of macromolecules, which he characterized as polymers. Harold Urey - An American physical chemist whose pioneering work on isotopes earned him the Nobel Prize in Chemistry in 1934 for the discovery of deuterium.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 23
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In 1950, which Russian astronomer revised the 'nebular hypothesis’, proposing that the sun is surrounded by a solar nebula consisting mainly of hydrogen and helium as well as dust?
[SSC CHSL 07/08/2023 (2nd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 23

Otto Schmidt. George Gamow - "Big Bang" theory of the origin of the universe and in 1954 his studies in biology led him to suggest that the genetic code was a triplet code. Naum Idelson - Soviet theoretical astronomer and expert in the history of physics and mathematics.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 24
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Who first introduced the idea of a relationship between molecular geometry and the number of valence electrons in the 1940s?
[SSC CHSL 14/08/2023 (2nd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 24

Sidgwick and Powell. VSEPR (Valence shell electron pair repulsion theory) - It is used to predict the shape of the molecules from the electron pairs. Limitation - It fails to explain isoelectronic species.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 25
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Which German chemist and physicist proposed that an aromatic compound must have an odd number of pairs of electrons, Which can mathematically be written as 4n + 2 (n = 0, 1, 2, 3 etc.) in 1931?
[SSC CGL 14/07/2023 (4th shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 25

Erich Huckel. Friedrich Kekule gave the Kekule structure in 1865, that is the ring structure (Benzene) with alternate double bonds. Diffraction data produced by Maurice Wilkins and Rosalind Franklin, proposed a very simple but famous Double Helix model for the structure of DNA. Antonie Lavoisier recognized hydrogen and named it and observed that air contains more than one gas.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 26
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Who received the Nobel Prize 'for his research in the stereochemistry of organic molecules and reactions' in 1975? [SSC CGL 24/07/2023 (2nd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 26

Vladimir Prelog. Stereochemistry: The study of the three-dimensional arrangement of atoms in molecules and the effects of this arrangement on chemical properties and reactions.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 27
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In which year did Antoine Lavoisier publish 'Methods of Chemical Nomenclature', which included the rules for naming chemical compounds that are still in use today?
[SSC CGL 26/07/2023 (2nd shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 27

1787. In 1774, Lavoisier (Father of modern chemistry) did many experiments investigating combustion that would discover oxygen. In 1789, he published the rst periodic table, his ndings describing the law of conservation of mass. Book - “Elementary Treatise of Chemistry”, “Elements of Chemistry”.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 28
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In 1931, who recognised that an aromatic compound must have an odd number of pairs of electrons, which can mathematically be written as 4n + 2 (n = 0,1,2,3 etc.)?
[SSC CGL 12/12/2022 (1st Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 28

Erich Huckel (1931). Two major contributions: the Debye–Huckel theory of electrolytic solutions and the Huckel method of approximate molecular orbital (MO) calculations on π electron systems.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 29
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In 1887, the Royal Society, London gave the Davy Medal for the ‘discovery of the periodic law of chemical elements’ to ____________.
[SSC CGL 09/12/2022 (3rd Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 29

John Alexander Newland stated the law of octaves (1865). The law of octaves states that every eighth element has similar properties when the elements are arranged in the increasing order of their atomic masses.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 30
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In which year Gay Lussac's Law of Gaseous Volumes was given by Gay Lussac?
[SSC CGL 09/12/2022 (1st Shift)]
Detailed Solution for Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 4 - Question 30

1808 . Four Gas Laws: Gay-Lussac's Law gives relation between the pressure exerted by a gas and the absolute temperature. Boyle's Law (1662) gives relation between the pressure and the volume of a gas, Charles's Law (1780) gives relation between the volume occupied by a gas and the absolute temperature. Avogadro's Law (1811) gives relation between the volume occupied by a gas and the amount of gaseous substance.

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