State your observation when –

(a) Sugar crystals are added to a hard glass test tube containing conc. sulphuric acid.

(b) Conc. H₂SO₄ is added to a crystal of hydrated copper sulphate.

(a) Steam is evolved from the test tube and it becomes very hot. Black spongy mass of carbon is formed.

$\underset{\text{Cane Sugar}}{\text{C}${12}\text{H}{22}\text{O}{11}} \text{ (s)} \xrightarrow{\text{Conc. H}2\text{SO}4} \underset{\text{Sugar Charcoal}}{12\text{C (s)}} + 11\text{H}2\text{O}

(b) The blue coloured hydrous copper sulphate changes to white anhydrous copper sulphate as the water of crystallization is removed.

$\text{CuSO}$4\text{.5H}2\text{O} \xrightarrow{\text{Conc. H}2\text{SO}4} \text{CuSO}4 \text{ [White Anhydrous]} + 5\text{H}2\text{O}