There are four substance W, X, Y and Z. The substance W is a dark violet solid having diatomic molecules. A solution of W in alcohol is used as a common antiseptic C. The susbstance X is a white solid which is usually recovered from sea water on a large scale. The substance Y is a white solid which is insoluble in water and used in the form of small balls for the safe storage of woollen clothes. The substance Z is a yet another white solid which is used in making commonly used dry cells.
(a) Name (i) W (ii) X (iii) Y and (iv) Z.
(b) Out of W, X, Y and Z, which substance/substances can undergo sublimation ?
(c ) Which substance is organic in nature ?
(d) what is the name of substance C ?
(e) Which substance belongs to the halogen family ?

Answer

(a) (i) Iodine (ii) Sodium chloride (Common salt) (iii) Naphthalene (iv) Ammonium chloride (b) W (iodine), Y (naphthalene) and Z (ammonium chloride) (c ) Y (naphthalene) (d) Tincture iodine) (e) W (iodine)