1.

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

Answer»

2
10
11
12

Solution :`[NAOH] =(0.4)/(40) = 0.01 M, [OH^(-)] = 10^(-2)M`
`[H^(+)] = 10^(-12), pH = -log[H^(+)] = 12`.


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