Main Group and Inorganic Chemistry

JKPSC Assistant Professor (Chemistry) · Chemistry · 58 practice questions with answers and explanations: 11 Easy, 47 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Which compound is known as laughing gas?

  1. N₂O
  2. NO₂
  3. N₂O₅
  4. NO
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Answer: A. Nitrous oxide is used as a mild anaesthetic.

Sample Easy question 2

The ion that gives a violet flame colour is:

  1. Sodium
  2. Calcium
  3. Potassium
  4. Barium
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Answer: C. Sodium is golden yellow, calcium brick red, barium apple green.

Sample Easy question 3

The most electronegative element is:

  1. Nitrogen
  2. Fluorine
  3. Chlorine
  4. Oxygen
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Answer: B. Fluorine has the highest electronegativity.

Sample Medium question 4

The element that exhibits catenation to the greatest extent is:

  1. Sulphur
  2. Carbon
  3. Silicon
  4. Nitrogen
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Answer: B. C–C bonds are strong.

Sample Medium question 5

Group 1 metals impart characteristic flame colours. The colour of lithium is:

  1. Brick red
  2. Violet
  3. Crimson red
  4. Golden yellow
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Answer: C. Sodium is yellow and potassium is violet.

Sample Medium question 6

The most basic oxide among the following is:

  1. Cs₂O
  2. MgO
  3. Li₂O
  4. BeO
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Answer: A. Basicity increases down the group.

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