Heating chloroform with aqueous sodium hydroxide solution forms-

• sodium acetate

• sodium oxalate

• sodium formate

• chloral

At T (K), the ratio of kinetic energies of 4g of H₂ (g) and 8 g of O₂ (g) is

• 1 : 4

• 4 : 1

• 2 : 1

• 8 : 1

Which one of the followng is an isotonic pair of solutions?

• 0.15 M NaCl and 0.11 M Na₂SO₄

• 0.2 M Urea and 0.1 M Sugar

• 0.1 M BaCl₂ and 0.2 M Urea

• 0.4 M MgSO₄ and 0.1 M NH₄Cl

The vapour pressure in mm of Hg, of an aqueous solution obtained by adding 18 g of glucose (C₆H₁₂O₆) to 180g of water at 100°C is

• 76.0

• 7.60

• 759

• 752.4

25.

During the electrolysis of copper sulphate aqueous solution using copper electrode, the reaction taking place at the cathode is

• Cu → Cu²⁺ (aq) + 2e^-

• Cu²⁺ (aq) + 2e^- → Cu (s)

• H⁺ (aq) + e^- → $\frac{1}{2}$ H₂ (g)

• SO${}_4^{2-}$ (aq) → SO₃ (g) + $\frac{1}{2}$O₂ (g) + 2e^-

The extent of charge of lead accumulator is determined by

• amount of PbSO₄ in the battery

• amount of PbO₂ in the battery

• specific gravity of H₂SO₄ of the battery

• amount of Pb in the battery

The number of octahedral and tetrahedral holes respectively present in a hexagonal close packed (hcp) crystal of 'X' atoms are

• X, 2X

• X, X

• 2X, X

• 2X, 2X

Which one of the following plots is correct for a first order reaction?

Match the following:

The correct match is

• A - iv; B - i; C - ii; D - iii

• A - iii; B - i; C - v; D - ii

• A - iii; B - i; C - ii; D - iv

• A - iv; B - i; C - v; D - iii

Which one of the following is not correct?

• Pyrophosphoric acid is a tetrabasic acid.

• Pyrophosphoric acid contains P-O-P linkage. Pyrophosphoric acrd contains two P-H bonds.

• Pyrophosphoric acid contains two P-H bonds.

• Orthophosphoric acd can be prepared by dissolvng P₄O₁₀ in water.