Question

Given :-
(a) $0.005M{H}_{2}S{O}_4$
(b) $0.1MN{a}_{2}S{O}_4$
(c) ${10}^{-2}MNaOH$
(d) $0.01MHCl$
Choose the correct code having same $pH:$

• A. $a,c,d$
• B. $b,d$
• C. $a,d$
• D. $a,c$

Answer 1

Answer: (C)

$a,d$

$\left(a\right)$ $0.005$ $M$ $H_{2}S{O}_4$

$0.01$ $N$ so, $pH=2$

$\left(b\right)$ $0.1$ $M$ $N{a}_{2}S{O}_4$

Salt of $SA+SB\to Neutral$ so, $pH=7$

$\left(c\right)$ ${10}^{-2}$ $NaOH$

So, $pOH=2$ and $pH=12$

$\left(d\right)$ $0.01$ $M$ $HCl$

So, $pH=2$

Thus $a,d$ have same pH.