Complete the following by choosing the correct answers from the bracket.

(a) The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is called …………… (electronegativity / electron affinity).

(b) Electrolysis of aqueous copper sulphate will form …………… (copper metal / copper (II) ions) at cathode.

(c) Quick lime is not used to dry HCl gas because it is …………… (alkaline/acidic) in nature.

(d) The fusible compound formed by the combination of flux and gangue is called …………….(mineral/slag).

(e) …………… (Hydrochloric acid/Acetic acid) is used in the digestion of proteins.

(a) Draw the structural formula for the following.

(1) 1,1-dichloroethane

(2) Butyne

(3) Ethan-1-al

(b) Name the following organic compounds in IUPAC system.

Distinguish between the following as directed.

(a) Calcium nitrate and lead nitrate using NaOH.

(b) Ferrous chloride and ferric chloride using NH₄OH.

Name the ions present in

(a) hydrogen chloride

(b) lead sulphate

(c) ammonium hydroxide