If 0.4 ,gm , ,NaOH is present in 1 litre solution, then its pH wi… - Vidyadip

MCQ

If $0.4\,gm\,\,NaOH$ is present in $ 1$ litre solution, then its $pH$ will be

A
$2$
B
$10$
C
$11$
✓
$12$

✓

Answer

Correct option: D.

$12$

(d) $[NaOH] = \frac{{0.4}}{{40}} = 0.01\,M;\,\,\,\,\,[O{H^ - }] = {10^{ - 2}}\,M$

$[{H^ + }] = {10^{ - 12}},\,\,pH = - \log [{H^ + }] = 12$

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