Chemistry MCQs with answers Page - 32

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A

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Q. Petroleum consists of a mixture of

  • (A) Carbohydrates
  • (B) Carbonates
  • (C) Hydrocarbons
  • (D) Carbides

A

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Q. What is the scientific name for washing soda?

  • (A) Sodium bicarbonate
  • (B) Calcium bicarbonate
  • (C) Calcium carbonate
  • (D) Sodium carbonate

A

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Q. The isotopes of chlorine with mass number 35 and 37 exist in the ratio of

  • (A) 2:3
  • (B) 3:1
  • (C) 3:4
  • (D) 1:2

A

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Q. Which of the following statements is true?

  • (A) Formic acid is a strong acid
  • (B) Water is neither acidic nor basic
  • (C) Hydrochloric acid is a weak acid
  • (D) Chloride ion is a weak base

A

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Q. What do we call the region of space around the nucleus where the probability of finding an electron is maximum?

  • (A) Shell
  • (B) sub-shell
  • (C) Orbital
  • (D) electron cloud

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Q. What will be the number of neutrons in an atom having atomic number 35 and mass number 80?

  • (A) 35
  • (B) 45
  • (C) 55
  • (D) 80

A

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Q. Which of the following reactions represents changing of green colour of ferrous sulphate?

  • (A) Double Displacement reaction
  • (B) Displacement reaction
  • (C) Combination reaction
  • (D) Decomposition reaction

A

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Q. What do we call the reaction when an acid and a base react together to form salt and water?

  • (A) Reduction Reaction
  • (B) Oxidation Reaction
  • (C) Neutralisation Reaction
  • (D) Combination Reaction

A

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Q. Which of these methods can be used to prevent rancidity?

  • (A) Adding antioxidants to the food
  • (B) Storing food at low temperature
  • (C) Replace the air with nitrogen in the packing material
  • (D) All of the above

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