MCQ
If $4.0 \,gm $ $NaOH$ is present in $1$ litre solution, then its $pH$ will be
- A$6$
- ✓$13$
- C$18$
- D$24$
✓
Answer
Correct option: B.
$13$
(b) $[NaOH]=0{.4}/{40\,\,{mole}/{l.}\;=0.1\,M}\;$
$[O{H^ - }] = {10^{ - 1}}M$, $[{H^ + }] = {10^{ - 13}}M$, $pH = 13$
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