Explain the principle of electrolytic refining with an example.

Write a note on zeolites.

How will you convert boric acid to boron nitride?

Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.

A solution of [Ni(H₂O)₆]²⁺ is green, whereas a solution of [Ni(CN)₄]^2- is colorless -Explain

The rate constant for a first order reaction is 1.54 x 10^-3 s^-1. Calculate its half life time.

The rate constant of a reaction at 400 and 200K are 0.04 and 0.02 s^-1 respectively. Calculate the value of activation energy.

Calculate i) degree of hydrolysis, ii) the constant hydrolysis  and iii) pH of 0.1M CH₃COONa solution (pK_a for CH₃COOH is 4.74).

A copper electrode is dipped in 0.1M copper sulphate solution at 25^oC. Calculate the electrode potential of copper. [Given: E⁰_Cu²⁺|Cu = 0.34V].

Comment on the statement: Colloid is not a substance but it is a state of substance.

What is the difference between homogenous and hetrogenous catalysis?

Complete the following reactions

ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)

How would you distinguish between (i) methyl alcohol and ethyl alcohol (ii) benzyl alcohol and phenol, (iii) ethyl alcohol and benzyl alcohol?

Compound A with molecular formula C₇H₆O reduces Tollen's reagent and also gives Cannizaro reaction. A on oxidation gives the compound B with molecular formula C₇H₆O₂ Calcium salt of B on dry distillation gives the compound C with molecular formula C_I3H₁₀O. Find A, B and C. Explain the reaction.

An organic compound (A) of molecular formula C₇H₆O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C₇H₆O₂ which gives brisk effervescence with NaHCO₃ solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.

A dibromo derivative (A) on treatment with KCN followed by acid hydrolysis and heating gives a monobasic acid (B) along with liberation of CO₂ . (B) on heating with liquid ammonia followed by treating with Br₂ /KOH gives (c) which on treating with NaNO₂ and HCl at low temperature followed by oxidation gives a monobasic acid (D) having molecular mass 74. Identify A to D.

How do primary, secondary and tertiary amines react with nitrous acid?

What are different types of RNA which are found in cell

Elucidate the structure of glucose.

Explain the prepareation of Bakelite and Give its use.