(a) Explain why an alkylamine is more basic than ammonia?
(b) How would you convert:
(i) Aniline to nitrobenzene
(ii)Aniline to iodobenzene

Write the name, stereochemistry and magnetic behaviour of the following:

(Atomic No: Mn = 25, Co = 27, Ni = 28)

(i) K₄[Mn(CN)₆]

(ii) [Co(NH₃)₅Cl]Cl₂

(iii) K₂[Ni(CN)₄]

Answer the following:

(i) Haloalkanes easily dissolves in organic solvents, why?

(ii)What is known as a racemic mixture? Give an example.

(iii)Of the two bromo-derivatives, C₆H₅CH(CH₃)Br and C₆H₅CH( C₆H₅)Br, which one is more reactive in SN₁ substitution reaction and why?

Describe the following giving one example for each:

i. Detergents

ii. Food preservatives

iii. Antacids

(a) Differentiate between molality and molarity of a solution. How does a change in temperature influence their values?
(b) Calculate the freezing point of an aqueous solution containing 10.50 g of MgBr₂ in 200 g of water. (Molar mass of MgBr₂ = 184 g) (K_ƒ for water = 1.86 K kgmol^-1

OR

(a) Define the terms osmosis and osmotic pressure. Is the osmotic pressure of a solution a colligative property? Explain
(b) Calculate the boiling point of a solution prepared by adding 15.00 g of NaCl to 250.0 g of water. (K_b for water = 0.512 K kg mol^-1, Molar mass of NaCl = 58.44 g)