A chemical that donate proton (hydrogen ion) is called:

The chemical used as a 'fixer' in photography is –

When pH of rain water is less than ____, it is called acid rain

The chemical name for vinegar is :

The chemical used for destroying fungi in water tank is

In the reaction between hydrogen sulphate ion and water: HSO4⁻ + H₂O → H3O⁺ + SO4²⁻ the water acts as