R - CH₂ - CH₂ - OH can be converted into RCH2CH2COOH by the following sequence of steps.

• PBr₃, KCN, H₂ /Pt

• PBr₃, KCN, H₃O⁺

• HCN, PBr₃, H₃O⁺

• KCN, H₃O⁺

At equilibrium, the rate of dissolution of a solid solute in a volatile liquid solvent is

• less than the rate of crystallisation

• greater than the rate of crystallisation

• equal to the rate of crytallisation

• zero

pK_a of acetic acid and pK_b of ammonium hydroxide are 4.76 and 4.75 respectively. Calculate the pH of ammonium acetate solution.

• 6.02

• 7.005

• 8

• 5.602

The value of K_c for the reaction,

2A  B + C is 2 x 10^-3. At a given time, if the composition of reaction mixture is [A] = [B] = [C] = 3 x 10^-3 M. Which is true?

• The reaction will proceed in forward direction

• The reaction will proceed in backward direction

• The reaction will proceed in any direction

• None of the above

For the homogeneous reaction,

4NH₃ + 5O₂ $\rightleftharpoons$ 4NO + 6H₂O

the equilibrium constant K_c has the units

• conc.⁺¹⁰

• conc.⁺¹

• conc.^-1

• it is dimensionless

Ammonia is a Lewis base and it forms complexes with many cations. Which one of the following cations does not form a complex with ammonia?

• Ag⁺

• Cu²⁺

• Cd²⁺

• Pb²⁺

507.

Argol, a brown crust, formed during the fermentation of grape juice contains

• CO₂

• fused oil

• potassium hydrogen tartarate

• lye

The pH value of 0.001 M aqueous solution of NaCl is

• 7

• 4

• 11

• unpredictable

Which buffer solution comprising of the following has its pH value greater than 7?

• CH₃COOH + CH₃COONa

• HCOOH + HCOOK

• CH₃COONH₄

• NH₄OH + NH₄Cl

10^-6 M NaOH is diluted 100 times. The pH of the diluted base is

• between 7 and 8

• between 5 and 6

• between 6 and 7

• between 10 and 11