Write the names and structures of the monomers of the following polymers:

(a) Terylene

(b) Teflon

(c) Nylon-6,6

(a) What is the radius of sodium atom if it crystallizes in bcc structure with the cell edge of 400 pm ?

(b) Examine the given defective crystal:

(i) Write the term used for this type of defect.

(ii) What is the result when XY crystal is doped with divalent (Z²⁺) impurity?

Give reasons:

(a) Propanone is less reactive than ethanal towards nucleophilic addition reactions.

(b) O₂N–CH₂–COOH has lower pK_a value than CH₃COOH.

(c) (CH₃)₂CH–CHO undergoes aldol condensation whereas (CH₃)₃C–CHO does not.

(a) Define crystal field splitting energy. On the basis of crystal field theory, write the electronic configuration for d⁴ ion if Δ_O < P.

(b) [Ni(CN)₄]^2– is colorless whereas [Ni(H₂O)₆]²⁺ is green. Why? (At. no. of Ni = 28)

What happens when?

(a) (CH₃)₃C–OH is treated with Cu at 573K,

(b) Anisole is treated with CH₃Cl / anhydrous AlCl₃,

(c) Phenol is treated with Zn dust.

Write chemical equations in support of your answer.