Conductivity of 2.5 × 10^-4 M methanoic acid is 5.25 × 10^-5 S cm^-1.

Calculate its molar conductivity and degree of dissociation.

Given:

λ_(H⁺₎ = 349.5S cm²mole^-1 and λ_(HCOO^-₎ = 50.5 Scm²mol^-1

How can the following conversion be carried out:

(i) Aniline to bromobenzene

(ii) Chlorobenzene to 2-chloroacetophenone

(iii) Chloroethane to butane.

OR

What happens when

(i) chlorobenzene is treated with Cl₂/FeCl₃.

(ii) Ethyl choride is treated with AgNO₂.

(iii) 2-bromopentane is treated with alcoholic KOH?

Write the chemical equations in support of your answer.

Examine the given defective crystal:

Answer the following questions:

(i) Is the above defect stoichiometric or non-stoichiometric?

(ii) Write the term used for this type of defect. Give an example of the compound which shows this type of defect.

(iii) How does this defect affect the density of the crystal?

Write any three differences between Physisorption and Chemisorption.

Give reasons for the following:

(i) Phenol is more acidic than methanol

(ii) The C – O – H bond angle in alcohols is slightly less than the tetrahedral angle (109⁰28’).

(iii) (CH₃)₃C – O – CH₃ on reaction with HI gives (CH₃)₃ C – I and CH₃ – OH as the main products and not (CH3)₃C – OH and CH₃ – I.