From the list of substances, choose one substance in each case which matches the descriptions given below:

(ethene, ammonia, acetylene, ammonium chloride, nitric oxide, copper nitrate, water, sodium nitrate)

(a) A compound with two lone pairs.

(b) A nitrate which does not produce a brown gas on heating.

(c) A covalent compound which produces ions when dissolved in water.

(d) A salt which does not contain a metal ion.

(e) An unsaturated hydrocarbon with a triple bond between carbon atoms.

(a) What do you mean by an acid salt ?

(b) Define the term 'Electronegativity'.

(c) State what do you see when a basic gas is passed over heated copper oxide.

(d) Write a balanced equation for the above reaction in (c).

(e) Draw an electron dot diagram of the negative ion formed when a basic gas is dissolved in water.

(a) State the type of bonding of the oxide of the element 'A' having electronic configuration 2, 8, 8. 1.

(b) Write the formula of the oxide of A.

This question relates to the preparation of Nitric acid on a large scale.

(a) Name the reactant used in this process.

(b) State the conditions under which the reactions occur.