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SSC CGL Exam  >  SSC CGL Test  >   Previous Year Papers  >  Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - SSC CGL MCQ

SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 with solutions


MCQ Practice Test & Solutions: Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 (100 Questions)

You can prepare effectively for SSC CGL SSC CGL Previous Year Papers with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1". These 100 questions have been designed by the experts with the latest curriculum of SSC CGL 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 60 minutes
  • - Number of Questions: 100

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Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 1
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What does it mean when an object has a positive charge?
[SSC MTS 19/05/2023 (Morning)]

Detailed Solution: Question 1

An electron is a negatively charged particle and protons are positively charged particles.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 2
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What is the relative charge of a proton and neutron?
[SSC MTS 15/06/2023 (Afternoon)]

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Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 3
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Which of the following pairs of 'number - composition' is correct?
I. Atomic number - number of protons
II. Mass number - Sum of number of neutrons and protons
[SSC CHSL 09/03/2023 (4th Shift)]

Detailed Solution: Question 3

Both I and II. As atomic number increases, subsequently mass number also increases.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 4
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Which of the following pairs of 'elements - valency' is correct?
I. Boron - 2
II. Fluorine - 3
[SSC CHSL 21/03/2023 (4th Shift)]

Detailed Solution: Question 4

Valency - Combining power of an element. Valency of some elements : Aluminium (+3), Boron (+3), fluorine (-1).

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 5
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Which theory discusses the relationship between ligand bonding and degradation of d orbitals in metal complexes and the geometry of metal complexes and the splitting of d orbitals?
[SSC CGL 05/12/2022 (4th Shift)]

Detailed Solution: Question 5

Crystal field theory: (1929, developed by physicist Hans Bethe) describes the breaking of orbital degeneracy in transition metal complexes due to the presence of ligands.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 6
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In 1898, whose theory propounded that the ions/groups bonded to the metal by secondary bonding have spatial arrangements corresponding to different characteristics coordination numbers?
[SSC CPO 09/11/2022 (Afternoon)]

Detailed Solution: Question 6

Alfred Werner. Nobel Prize for Chemistry (1913). Henry Taube - Nobel Prize in Chemistry (1983 - “for his studies of the mechanisms of electron transfer in metal complexes”).

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 7
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What is the atomicity of Phosphorus?
[SSC CPO 10/11/2022 (Evening)]

Detailed Solution: Question 7

Tetra-atomic. Atomicity is the total number of atoms present in a molecule. Polyatomic (composed of three or more atoms). Phosphorus was first made by Hennig Brandt in 1669.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 8
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Which formula is used to represent the three-dimensional structures of molecules using a two-dimensional surface like a sheet of paper or a computer screen?
[SSC CPO 11/11/2022 (Evening)]

Detailed Solution: Question 8

Dash-wedge formula. Bond - line formula is used for every bond represented as a line in a zigzag manner.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 9
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Which of the following is NOT an alkaline earth metal?
[SSC Stenographer 12/10/2023 (Morning)]

Detailed Solution: Question 9

Na (Sodium) - It is an Alkali metal. Alkaline earth metals: Beryllium (Be, 4), Magnesium (Mg, 12), Calcium (Ca, 20), Strontium (Sr, 38), Barium (Ba, 56), Radium (Ra, 88). They have two electrons in their outermost shells. Alkali metals: Lithium (Li, 3), Sodium (Na, 11), Potassium (K, 19), Rubidium (Rb, 37), Caesium (Cs, 55), Francium (Fr, 87).

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 10
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What is the name of the seventh most abundant metal in the earth's crust, which is derived from the medieval Latin word 'Kalium'?
[SSC MTS 01/09/2023 (1st Shift)]

Detailed Solution: Question 10

Potassium. It makes up 2.4% by mass of the Earth crust. Aluminium is the most abundant metal and Oxygen is the most abundant non-metal found in the earth's crust. Eight most abundant elements in the Earth's crust are Oxygen (O), Silicon (Si), Aluminium (Al), Calcium (Ca), Iron (Fe), Magnesium (Mg), Sodium (Na), and Potassium (K).

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 11
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An image of which of the following elements is shown by the map of Cyprus from which the element got its name?
[SSC MTS 13/09/2023 (2nd Shift)]

Detailed Solution: Question 11

Copper (Cu, Atomic no 29). It is a good conductor of heat and electricity. It is in group 11, period 4 and block ‘d’ of the periodic table. It was the first metal used by man on earth.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 12
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Which radioactive isotope has a half-life of 5770 years, which is commonly used to estimate the age of organic materials such as paper and parchment?
[SSC CHSL 08/08/2023 (1st shift)]

Detailed Solution: Question 12

14C - It is an unstable and weakly radioactive isotope of carbon. Three Natural isotopes of carbon: 12C, 13C and 14C. Isotopes - Atoms of the same element having the same atomic number but different mass numbers. For example, take the case of hydrogen atom, it has three atomic species, namely protium (¹₁H), deuterium (²₁H or D) and tritium (³₁H or T). The atomic number of each one is 1, but the mass number is 1, 2 and 3, respectively.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 13
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What is the most stable mineral during the process of weathering?
[SSC CHSL 10/08/2023 (1st shift)]

Detailed Solution: Question 13

Quartz (felsic mineral). Iron oxides, Al-hydroxides, clay minerals and quartz are the most stable weathered products whereas highly soluble minerals like halite are the least stable. Silicates fall within the middle range. Mac silicates like olivine, pyroxene or amphibole breakdown relatively easily. Weathering - The breaking down or dissolving of rocks and minerals on Earth's surface. Types of weathering: Chemical, Physical and Biological Weathering.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 14
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From which Latin word is the s-block element calcium derived?
[SSC CGL 14/07/2023 (3rd shift)]

Detailed Solution: Question 14

Calx (calcium hydroxide). Formula - Ca(OH)₂. It is used in industrial settings, such as sewage treatment, paper production, construction, and food processing. Calum (calcium carbonate): Formula - CaCO₃.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 15
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Which of the following are metalloids?
[SSC CGL 18/07/2023 (2nd shift)]

Detailed Solution: Question 15

Boron, silicon, antimony. Metalloids - Chemical elements whose physical and chemical properties fall in between the metal and non-metal categories. Seven most widely recognized metalloids - Boron, germanium, silicon, antimony, arsenic, tellurium and polonium.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 16
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Which among the following alloys is a combination of gold and silver?
[SSC MTS 10/05/2023 (Evening)]

Detailed Solution: Question 16

Electrum. Some other alloys: Steel (Carbon and Iron). Stainless steel - (Iron with Chromium and Nickel). German silver - (copper, zinc and nickel). Rose Metal - (Bismuth, Lead and Tin). Gun Metal - (Cu + Sn + Zn + Pb). Dutch metal- (Cu and Zn). Constantan (Eureka) - Alloy of 55% Copper and 45% Nickel. Solder - It is made up of Tin and Lead.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 17
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What is the characteristic of isotopes?
[SSC MTS 18/05/2023 (Afternoon)]

Detailed Solution: Question 17

An example of a group of isotopes is hydrogen-1 (protium), hydrogen-2 (deuterium), and hydrogen-3 (tritium). Isodiaphers - They are atoms of different elements that have the same difference between the number of protons and the number of neutrons.
Example: Carbon-12 and Nitrogen-14.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 18
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Which of the following metals is always a component in an amalgam?
[SSC MTS 15/06/2023 (Morning)]

Detailed Solution: Question 18

Mercury. Amalgam is an alloy of mercury with one or more metals. The most common amalgam is dental amalgam, which is used to fill cavities in teeth. Dental amalgam is a mixture of mercury, silver, tin, and copper.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 19
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Which among the following alloys is made up of copper and zinc?
[SSC CHSL 13/03/2023 (3rd Shift)]

Detailed Solution: Question 19

Dutch Metal. Monel metal: Group of alloys of Copper and Nickel. Uses: marine engineering, chemical and hydrocarbon processing equipment, valves, pumps, shafts, fittings, fasteners, and heat exchangers. Magnalium: Mixture of magnesium and aluminium, used in making aircrafts and automobile parts. Rolled gold: An alloy of Copper and Aluminium, used for making cheap ornaments.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 20
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Which of the following statements is NOT correct regarding the alkali metals?
[SSC CPO 11/11/2022 (Afternoon)]

Detailed Solution: Question 20

Alkali metals have one electron in their valence shell. Group 1A of the periodic table are the alkali metals: Hydrogen (H, 1), Lithium (Li, 3), Sodium (Na, 11), Potassium (K , 19), Rubidium (Rb, 37), Cesium (Cs, 55), and Francium (Fr , 87).

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 21
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Which of the following metals having atomic number 3 is a soft, silvery metal with very low density that reacts vigorously with water and corrodes quickly in air?
[SSC CHSL 24/05/2022 (Morning)]

Detailed Solution: Question 21

Lithium. It has the lowest density of all metals. Lithium is the first of the alkali metals in the periodic table. It is highly reactive and does not occur freely in nature. Lithium is the only alkali metal that reacts with nitrogen.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 22
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The particles of which metal on heating to the boiling point of 357°C go from liquid state to gas state?
[SSC CHSL 26/05/2022 (Afternoon)]

Detailed Solution: Question 22

Mercury (Hg, Atomic Number-80) is also a good conductor of electricity, so it is a useful component of electrical switches. Mercury is also used in dental fillings, paints, soaps, batteries, and fluorescent lighting. It is commonly known as quicksilver and was formerly named hydrargyrum.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 23
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Identify the alloy among the following of which lead is a component.
[SSC MTS 26/10/2021 (Morning)]

Detailed Solution: Question 23

Solder is a metal alloy usually made of tin and lead. Alnico - aluminium (Al), nickel (Ni), and cobalt (Co). Constantan - A copper-nickel alloy used in electrical work for its high resistance.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 24
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What is the Atomic Number of the element Einsteinium?
[SSC CPO 23/11/2020 (Morning)]

Detailed Solution: Question 24

99. Einsteinium (Es), synthetic chemical element of the actinoid series of the periodic table.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 25
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Which of the following is an example of a pair of Isobars?
[SSC CHSL 17/03/2020 (Evening)]

Detailed Solution: Question 25

Calcium (Ca, 20) and argon (Ar, 18). The mass number of both these elements is 40u.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 26
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When the litmus solution is neither acidic nor basic, its colour is ______.
[SSC MTS 13/06/2023 (Afternoon)]

Detailed Solution: Question 26

Purple. Litmus solution - It is extracted from lichen. Litmus paper (pH paper) - Made by treating the paper with natural dyes from lichens. The base turns Red litmus to blue, while acid turns blue litmus to red. Some natural Indicators - Red cabbage leaves, turmeric, coloured petals of some flowers (Hydrangea, Petunia, and Geranium).

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 27
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Which of the following acids makes the pH of vinegar acidic?
[SSC MTS 14/06/2023 (Afternoon)]

Detailed Solution: Question 27

Acetic acid (CH3COOH). Vinegar is a liquid that is made by fermenting alcohol. The fermentation process produces acetic acid, which gives vinegar its sour taste and acidic properties. It has a pH of around 2.4. Some other acids and their sources: Citric acid - Lemons and Oranges. Linoleic acid - Vegetable oils. Tartaric acid - Tamarind. Lactic acid - Milk. Ascorbic acid - Tomatoes.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 28
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Acidic nature of soil is shown by high concentration of ______.
[SSC CGL 13/04/2022 (Morning)]

Detailed Solution: Question 28

Hydrogen is used in the synthesis of ammonia and the manufacture of nitrogenous fertilisers. The main function of phosphorus is in the formation of bones and teeth. Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 29
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Which of the following is NOT a natural acid-base indicator?
[SSC MTS 05/10/2021 (Morning)]

Detailed Solution: Question 29

Thyme leaves is a herb and also has medicinal uses. Geranium flowers, petunia flowers, and red cabbage act as pH indicators due to the presence of the water-soluble vacuolar pigment named Anthocyanin.

Test: SSC CGL Previous Year Questions: Chemistry (2023-20) - 1 - Question 30
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When an ant bites, it injects acidic liquid (formic acid) into the skin. What among the following should be applied to the skin to neutralise it?
[SSC MTS 08/10/2021 (Morning)]

Detailed Solution: Question 30

Moist baking soda should be applied to the skin to neutralize it. Because the base is present in baking soda and when an acid reacts with the base it neutralizes and we get relief.

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