Question

A current of 9.65 A flowing for 10 minutes deposits 3.0 g of a metal which is monovalent. The atomic mass of the metal is:

• A. 10
  
• B. 50
  
• C. 30
  
• D. 96.5

Answer 1

The correct option is B 50


Let A be the atomic weight of the metal.

1 mol of metal = A $g$.
$96500C\Rightarrow$ A $g$.
$9.65\times 10\times 60\Rightarrow \frac{A}{96500}\times 9.65\times 10\times 60$

$\therefore A\times 0.06=3g$

$A=\frac{3}{0.06}=50g$