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  9. Q118

WBCS 2024 · Question 118 of 196

Formula of the Chloride of an element M is MCl4 and its Molecular weight is 154 (Cl = 35.5). The molecular weight of its oxide is:

Science - Chemistry

  1. A64
  2. B72
  3. C44Correct
  4. D40

Answer: C. 44

Explanation

Official WBPSC key (Series A): (C) 44. MCl4: M + 4(35.5) = 154, so M = 12 (carbon). The oxide MO2 = 12 + 2(16) = 44.

Source: WBCS (Exe) etc. (Prelim) 2024, Series A

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