Explain the following:

Lead carbonate does not react with dil. HCl

Explain the following:

Nitrogen dioxide is a double acid anhydride.

Give equations to show how the following are made from their corresponding anhydrides.

(a) sulphurous acid

(b) phosphoric acid

(c) carbonic acid

(d) sulphuric acid

Name an acid used:

(a) to flavour and preserve food;

(b) in a drink

(c) to remove ink spots

(d) as an eyewash.