A, B and C are all liquids. Liquid A has a comparatively low boilin...

A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid \( \mathrm{A} \) is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises
P completely on heating, without leaving any residue. Liquid \( B \) is a conductor of electricity and used in making thermometers. Liquid \( \mathrm{C} \) has a moderate boiling point. On heating, liquid \( \mathrm{C} \) vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from \( C \) give a liquid \( E \) which turns anhydrous \( \mathrm{CuSO}_{4} \) to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E?
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