Question

1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of the metal is:

• A. 1.52
• B. 0.995
• C. 190
• D. 9

Hint:

Equivalent weight is calculated using oxygen or hydrogen displacement.

Answer 1

The Correct Option is D

Step 1: Mass loss on ignition. Mass of water lost = 1.520 - 0.995 = 0.525 g
Step 2: Oxygen-hydrogen ratio. Equivalent weight of metal is calculated using oxygen combination.
Step 3: Final calculation. Using stoichiometric relation, equivalent weight comes out to be 9.