Question

The mass of $\text{C}{\text{l}}_2$ produced in grams when 1A current is passed through NaCl solution for 30 minute is:

• A. 0.35g
• B. 0.66g
• C. 0.23g
• D. 0.76g

Answer 1

Answer: (B)

0.66g

The charge (q) = $i\times t$
= $1\text{A}\times 30\times 60s$
= 1800 C

Current is passed through NaCl.

$\text{NaCl}\to \text{N}{\text{a}}^{+}+\text{C}{\text{l}}^{-}$

1 faraday of charge = 96500 C

96500C liberates 35.5g of $\text{C}{\text{l}}_2$ which is its equivalent weight.

1 C liberates $\frac{35.5\text{g}}{96500\text{C}}\text{of}\text{C}{\text{l}}_{\text{2}}$

1800 C liberates $\frac{35.5\text{g}}{96500\text{C}}\times 1800\text{C}\text{of}\text{C}{\text{l}}_{\text{2}}$

=0.66g

Thus, option (B) is the correct option.