1.

To make a solution of `pH=12`, the amount of `NaOH` dissolved in one litre of the solution should beA. `0.1g`B. `0.2g`C. `0.4g`D. `1.2g`

Answer» Correct Answer - C
`pH=12 means [H^(+)]=10^(-12)`
or `[OH^(-)]=10^(-2) M`
or `[NaOH] =10^(-2) M (:pOH=2)`
`=(1)/(100)xx40gL^(-1)=0.4GL^(-1)`


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