Question

$10 \,cm^3$ of $0.1\, N$ monobasic acid requires $15 \,cm^3$ of sodium hydroxide solution whose normality is

• A. $1.5\, N$
• B. $0.15 \,N$
• C. $0.066\, N$
• D. $0.66\, N$

Answer 1

Answer: (C)

$0.066\, N$

Answer 2

Volume of monobasic acid $=10 \,cm ^{3}$

Normality of monobasic acid $=0.1 \,N$

Volume of $NaOH$ solution $=15 \,cm ^{3}$

Normality of $NaOH$ solution $=?$
$N_{1} V_{1}=N_{2}\, V_{2}$

(for monobasic acid ) (for $NaOH$ )

$10 \times 0.1\, N=15 \times N_{2}$
$N_{2}=\frac{1 N}{15}=0.066\, N$