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Chemistry - 2 (Railways - RRB)

Chemistry - 2 (Railways - RRB)

20 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is an element?

  1. Ruby
  2. Sapphire
  3. Emerald
  4. Diamond
Question 2 Multiple Choice (Single Answer)

The rare gas which is present most abundantly in air is

  1. helium
  2. krypton
  3. argon
  4. radon
Question 3 Multiple Choice (Single Answer)

Which of the following is a major constituent of LPG?

  1. Methane
  2. Octane
  3. Butane
  4. Ethane
Question 4 Multiple Choice (Single Answer)

Who discovered neutron?

  1. Thomson
  2. Chadwick
  3. Bohr
  4. Rutherford
Question 5 Multiple Choice (Single Answer)

Vinegar is an aqueous solution of

  1. oxalic acid
  2. citiric acid
  3. acetic acid
  4. hydrochloric acid
Question 6 Multiple Choice (Single Answer)

Which gas is used for artificial ripening of green fruits?

  1. Acetylene
  2. Ethane
  3. Carbon dioxide
  4. Hydrogen
Question 7 Multiple Choice (Single Answer)

Conversion of sugar into alcohol using yeast is called

  1. fermentation
  2. pasteurisation
  3. hydrogenation
  4. carbonisation
Question 8 Multiple Choice (Single Answer)

There is no reaction when steam is passed over heated

  1. copper
  2. carbon
  3. aluminium
  4. iron
Question 9 Multiple Choice (Single Answer)

Next to hydrogen, the lightest gas known is

  1. CO2
  2. He
  3. Ar
  4. O2
Question 10 Multiple Choice (Single Answer)

Atoms of an element differ from atoms of all the other elements in

  1. atomic number and electronic configuration
  2. atomic number and number of valence electrons
  3. number of neutrons and electronic configuration
  4. number of neutrons and number of valence electrons
Question 11 Multiple Choice (Single Answer)

Carbon dioxide can be prepared by

  1. the reaction of tin with sulphuric acid
  2. the reaction of carbon with hydrochloric acid
  3. the reaction of marble with sulphuric acid
  4. the reaction of zinc with hydrochloric add
Question 12 Multiple Choice (Single Answer)

Which of the following chemical compounds of sodium salt is used in making baking powder?

  1. Sodium carbonate
  2. Sodium hydroxide
  3. Sodium chloride
  4. Sodium nitrate
  5. Sodium acetate
Question 13 Multiple Choice (Single Answer)

Which of the following compounds is used as a building material in the form of marble?

  1. CaO
  2. CaSO4
  3. CaCO3
  4. CaSiO3
Question 14 Multiple Choice (Single Answer)

What should be the chemical nature of toothpastes?

  1. Highly acidic
  2. Mildly acidic
  3. Highly basic
  4. Mildly basic
Question 15 Multiple Choice (Single Answer)

Which of the following does not undergo sublimation?

  1. Ammonium chloride
  2. Sodium chloride
  3. Iodine
  4. Naphthalene
Question 16 Multiple Choice (Single Answer)

In which of the following pH ranges does our body work?

  1. 6 - 7
  2. 7.2 - 7.8
  3. 7.0 - 7.5
  4. 7.2 - 7.9
Question 17 Multiple Choice (Single Answer)

Which of the following gases is known as illuminating gas?

  1. Ethane
  2. Ethene
  3. Ethyne
  4. None of these
Question 18 Multiple Choice (Single Answer)

Why is it difficult to break an iron nail?

  1. Because of high kinetic energy
  2. Because of strong force of attraction
  3. Because of high mechanical energy
  4. Because of indivisibility of its particles
Question 19 Multiple Choice (Single Answer)

Why is sponge compressible although it is a solid?

  1. Because the bonds between the particles can be easily broken
  2. Because it has minute holes in which air is trapped
  3. Because its particles have weak force of attraction
  4. Because its particles have high kinetic energies
Question 20 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

(1) Mild hydrochloric acid is used to get relief from bee sting.
(2) Plaster of Paris is mainly an organic compound of calcium.

  1. Only (1)
  2. Only (2)
  3. Both (1) and (2)
  4. Neither (1) nor (2)
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