Carbocation as an intermediate is likely to be formed in the reaction

• Propene + Cl₂ $\stackrel{hv}{\to }$ 2-chloropropane

• Acetone + HCN $\stackrel{-OH}{\to }$ acetonecyano hydrin

• Ethylbromide + aq.KOH $\stackrel{∆}{\to }$ ethyl alcohol

• Hexane $\stackrel{\mathrm{anhy}. {\mathrm{AlCl}}_3/ \mathrm{HCl}}{\to }$ 2-methyl pentane

The IUPAC name of 'B' is

• 3-methylbutan-2-ol

• 2-methylbutan-3-ol

• 2-methylbutan-2-ol

• pentan-2-ol

The correct sequence of reactions to be performed to convert benzene into m-bromoaniline is

• nitration, reduction, bromination

• bromination, nitration, reduction

• nitration, bromination, reduction

• reduction, nitration, bromination

The compound that reacts the fastest with sodium methoxide is

The correct statement is

• Cyclohexadene and cyclohexene cannot be isolated with ease during controlled hydrogenation of benzene

• One mole each of benzene and hydrogen when reacted gives 1/3 mole of cyclohexane and 2/3 mole unreacted hydrogen

• Hydrogenation of benzene to cyclohexane is an endothermic process

• It is easier to hydrogenate benzene when compared to cyclohexene

The statement that is not correct is

• Hypophosphorous acid reduces silver nitrate to silver

• In solid state PCl₅ exists as [PCl₄]⁺ [PCl₆]^-

• Pure phosphine is non-inflammable

• Phosphorous acid on heating disproportionates to give metaphosphonic acid and phosphine

In which one of the pairs of ion given, there is an ion that forms a coordination compound with both aqueous sodium hydroxide and ammonia and an other ion that forms a coordination compound only with aqueous sodium hydroxide?

• Pb²⁺, Cu²⁺

• Zn²⁺, Al³⁺

• Cu²⁺, Zn²⁺

• Al³⁺, Cu²⁺

38.

A crystalline solid X reacts with dil. HCl to liberate a gas Y. Y decolourises acidified KMnO₄. When a gas 'Z' is slowly passed into an aqueous solution of Y, colloidal sulphur is obtained X and Z could be respectively

• Na₂S, SO₃

• Na₂SO₄, H₂S

• Na₂SO₃, H₂S

• Na₂SO₄, SO₂

A solution of 1.25 of 'P' in 50 g of water lowers freezing point by 0.3°0. Molar mass of 'P' is 94. K_f(water) = 1.86 K kg mol^-1. The degree of association of 'P' in water is

• 80%

• 60%

• 65%

• 75%

Volume occupied by single CsCl ion pair in a crystal is 7.014 × 10^-23 cm³. The smallest Cs-Cs internuclear distance is equal to length of the side of the cube corresponding to volume of one CsCl ion pair. The smallest Cs to Cs internuclear distance is nearly 

• 4.4 Å

• 4.3 Å

• 4 Å

• 4.5 Å