The pH of z solution at `25^(0)C` is `2`. If its pH is to be changed to 4, conc. of `H^(+)` of the original has to be

Options

A. Doubled
B. Halved
C. Increased by `100` times
D. Decreased by `100` times

Answer

D

Explanation

`pH = 2, :. [H^(+)] = 10^(-2)`
`pH = 4, :.[H^(+)] = 10^(-4)`
Decreased by `100` times