Chapter No 1 :Chemistry of s , p , d , Block Elements (84 MCQ`S)

  1. Which catalyst is used in contact process?
    1. Fe2O3
    2. V2O5
    3. SO3
    4. Ag2O
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  2. Which of the following specie has the maximum number of unpaired electron?
    1. O2
    2. O2+
    3. O2-2
    4. O2-
    5. Show Answer
      Answer: A
      Explanation:
      • N/A
  3. Which one of the following does not exhibit allotropy ?
    1. Bi
    2. As
    3. N
    4. P
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  4. Which of the following is the most abundant element on the earth crust
    1. Al
    2. B
    3. Si
    4. O
    5. Show Answer
      Answer: D
      Explanation:
      • N/A
  5. The anhydride of nitric acid is
    1. N2O4
    2. N2O3
    3. N2 O5
    4. NO2
    5. Show Answer
      Answer: D
      Explanation:
      • N/A
  6. Which of the following is the 2nd most abundant element on the earth crust
    1. Al
    2. B
    3. Si
    4. O
    5. Show Answer
      Answer: C
      Explanation:
      • N/A
  7. Which of the following gives brown ring with FeSO4
    1. NO3-
    2. NO2
    3. NO
    4. N2O3
    5. Show Answer
      Answer: A
      Explanation:
      • N/A
  8. Which of the following halogen halide is the weakest acid in the solution.
    1. HCl
    2. HF
    3. HI
    4. HBr
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  9. Chlorine heptaoxide reacts with water to form
    1. hypochlorous acid
    2. perchloric acid
    3. chloric acid
    4. chlorous acid
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  10. Hydrogen bond is the strongest between the molecules of :
    1. HF
    2. HCl
    3. HBr
    4. HI
    5. Show Answer
      Answer: A
      Explanation:
      • N/A

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