DPP 7.2

Calculate the change in $\mathrm{pH}$ when $4 \mathrm{g}$ of solid $\mathrm{NaOH}$ and $10 \mathrm{mmol}$ of ${\mathrm{H}}_2{\mathrm{SO}}_4$ are added to a solution of volume $5$ $\mathrm{litre}$, which was prepared by mixing $20 \mathrm{mmol}$ of $\mathrm{HCl}$. $40 \mathrm{mmol}$ of ${\mathrm{H}}_2{\mathrm{SO}}_4$ and $2 \mathrm{g}$ of $\mathrm{NaOH}$ and sufficient water. Ignore the volume change.

 $\left(\log 2=0.3, \log 3=0.48\right)$

$\mathrm{pOH}$ of ${\mathrm{H}}_2\mathrm{O}$ is $7.0$ at $298 \mathrm{K}$. If water is heated at $350 \mathrm{K}$, then which of the following statements should be true?

A $50 \mathrm{mL}$ solution of strong acid of $\mathrm{pH}=1$ is mixed with a $50 \mathrm{ml}$ solution of strong acid of $\mathrm{pH}=2$. The $\mathrm{pH}$ of the mixture will be nearly $\left(\log 5.5=0.74\right)$

Which of the following solution will have $\mathrm{pH}$ close to $1.0$?

$0.1 \mathrm{mol} \mathrm{HCl}$ is dissolved in distilled water of volume $\mathrm{V}$, then at ${\lim }_{\mathrm{V}\to \infty } (\mathrm{pH}{)}_{\text{solution }}$ is equal to:

Which of the following expressions is not true?

Milliequivalent of $\mathrm{Ba}(\mathrm{OH}{)}_2,$ present in $100 \mathrm{mL}$ solution to have $\mathrm{pH}=13,$ is

Which of the following statements is/are not correct?