Hydrogen ion concentration in `mol//L` in a solution of `pH=5.4` will be:

The hydroxyl ion concentration in a solution having pH = 4 will be

The hydrogen ion concentration in a given solution is 6 xx 10^-4. Its pH will be:

The pH of a solution is 5. Its hydrogen ion concentration is increased 100 times. Its pH will be :

The concentration of H^+ ions in a solution whose pH is 8

The pH of a solution is 5.9. If the hydrogen ion concentration in decreased hundred times, the solution will be :