Answer variants:
Curd contains 'Acetic acid' which reacts with metals.
If concentration of \(H^+\) ions increases it becomes acidic whereas if the concentration of \(H^+\) ions decreases it becomes basic.
Dry slaked lime \(Ca(OH)_2\).
1. What effect does the concentration of \(H^+\) ions have on the nature of the solution?
2. Name the substance which on treatment with chlorine yields bleaching powder.