When $100 \ mL$ of $0.1 \ M$ $NaOH$ is added to $50 \ mL$ of $0.2 \ M$ $HCl$ at $25 \ ^oC$,the $pH$ of the resulting solution will be:

Equal volumes of two solutions $A$ and $B$ of a strong acid having $pH=6.0$ and $pH=4.0$ respectively are mixed together to form a new solution. The $pH$ of the new solution will be in the range

The gastric juice in our stomach contains enough $HCl$ to make the hydrogen ion concentration about $0.01 \, mole/litre$. The $pH$ of gastric juice is

Which of the following will have the highest $pH$?

The $pH$ of a solution obtained by mixing $10 \ mL$ of $0.1 \ M$ $HCl$ and $40 \ mL$ of $0.2 \ M$ $H_2SO_4$ is (Given $\log 17 = 1.23, \log 5 = 0.7, \log 10 = 1$)

The $pH$ of a $10^{-9} \ M$ solution of $HCl$ in water is