State the reasons why

(i) boiled water tastes flat

(ii) a soda water bottle opens with a 'fizz'.

What is meant by the terms :

(a) crystal, (b) crystallization, (c) seed crystal.

Explain with examples

Differentiate between hydrated and anhydrous crystals with examples. State three defined changes which occur when hydrated copper sulphate is heated.

Washing soda and iron [III] chloride are separately exposed to the atmosphere. State

(i) the observations seen (ii) the phenomenon which occurs (iii) the reason for the phenomenon occurring in each case.

Would a similar phenomenon occur in case of exposure of common salt. Explain giving reasons.