Question

For the preparation of a litre of $N/10$ solution of $H_{2}S{O}_4$, we need

• A. $9,8g$
• B. $4.9g$
• C. $10g$
• D. $98g$

Answer 1

Answer: (B)

$4.9g$

We require a N/10 solution i.e.0.1 Normal solution
$H_{2}S{O}_4\to 2H^{+}+S{O}_4^{-2}$
From the equation above 1 Molar solution of $H_{2}S{O}_4$ is equal 2 N solution
Molecular weight of H2SO4= 98 gms
For 1 M solution you would require 98 gms = 2 N solution
1 N solution would require 98/2 = 49 gms
For a 0.1 N solution = 4.9 gms (Observe decimal adjustment).
Hence option B is correct.