Give one example for each of the following:

(a) An artificial sweetener whose use is limited to cold drinks.

(b) A non-ionic detergent.

(c) A pain reliever used for relief from severe pain like post-operative pain.

An aromatic compound A on treatment with ammonia followed by heating forms compound B which on heating with Br₂ and KOH forms compound C having molecular formula C₆H₇N. Give the structures of A,B and C.

(a) Identify the monomer in the following polymeric structure:

(b) Which one of the following is an Elastomer?

(c) On the basis of forces between their molecules in a polymer, to which class does polyester belong?

Aadik Behl was playing in the park with his friends. While running to catch a ball, one of his friends, Saurish fell down and he had a cut on his hand due to which lot of blood was coming out. Aadik took him to his house and applied alum on the cut due to which the blood stopped.

Answer the following questions:

(a) Why did the blood stop after applying alum on the cut?

(b) Alum is used for purification of water. Why?

(c) Artificial rain is caused by spraying silver iodide on clouds. Give reason.

(d) What are the values (any two) displayed by Aadik?

Calculate the emf and for the following cell at 298K:

OR

(a) Give reasons for the following:

(i) Iron does not rust even if zinc coating is broken in galvanized pipe.

(ii) Copper sulphate solution cannot be stored in zinc container.

(b) The molar conductivity of 0.025 mol L^-1 methanoic acid is 46.1S cm²mol^-1. Calculate its degree of dissociation and dissociation constant.

[Given: λ^o_H+ = 349.6 S cm² mol^-1 ; λ^o_HCOO- = 54.6 S cm² mol^-1]