Question

Equivalent weight of a bivalent metal is 37.2. The molecular weight of its chloride is:

• A. 412.2
• B. 216
• C. 145.4
• D. 108.2

Hint:

Equivalent weight of compound = Eq. wt. of metal + Eq. wt. of radical.

Answer 1

The Correct Option is C

Step 1: Concept
$\text{Atomic weight} = \text{Equivalent weight} \times \text{Valency}$.
Step 2: Analysis
* Atomic weight of metal $= 37.2 \times 2 = 74.4$. * Formula of chloride is $\text{MCl}_{2}$ (as metal is bivalent). * Molecular weight $= 74.4 + (2 \times 35.5)$.
Step 3: Conclusion
Molecular weight $= 74.4 + 71 = 145.4$.
Final Answer: (C)