171.

In context with the industrial preparation of hydrogen from water gas (CO + H₂), which of the following is the correct statement?

• CO and H2 are fractionally separated using differences in their densities

• CO is removed by absorption in aqueous Cu2Cl2 solution

• H₂ is removed through occlusion with Pd

• H₂ is removed through occlusion with Pd

Number of hydrogen ions present in 10 milionth part of 1.33 cm³ of pure water at 25°C is

• 6.023 million

• 60 million

• 8.01 million

• 80.23 million

Some statements about heavy water are given below.
(i) Heavy water is used as moderator in nuclear reactors.
(ii) Heavy water is more associated than ordinary water.
(iii) Heavy water is more effective solvent than ordinary water.
Which of the above statements are correct?

• (i) and (ii)

• (i), (ii) and (iii)

• (ii) and (iii)

• (i) and (iii)

The heat of formation of water is 260 kJ. How much H₂O is decomposed by 130 kJ of heat?

• 0.25 mol

• 1 mol

• 0.5 mol

• 2 mol

What is the quantity of hydrogen gas liberated when 46 g sodium reacts with excess ethanol? (Given atomic mass of Na = 23)

• 2.4 × 10^-3 kg

• 2.0 × 10^-3 kg

• 4.0 × 10^-3 kg

• 2.4 × 10^-2 kg

Tert-butyl methyl ether on treatment with hydrogen iodide in cold gives

• tert-butyl iodide and methyl iodide

• tert-butyl alcohol and methyl alcohol

• tert-butyl alcohol and methyl iodide

• tert-butyl iodide and methyl alcohol

What is the actual volume occupied by water molecules present in 20 cm³ of water?

• 20 cm³

• 10 cm³

• 40 cm³

• 24.89 cm³

Which one of the following is reduced by H₂O₂ in alkaline medium?

• Fe²⁺

• HOCl

• KMnO₄

• PbS

The reaction of H₂ is given below

H₂ + CO + R - CH = CH₂ → R - CH₂

-CH₂-CHO is specifically called as

• hydrogenation

• reduction

• hydroformylation

• dehydration

Which of the following undergoes reduction with hydrogen peroxide in alkaline medium?

• Mn²⁺

• FeO

• PbS

• HOCl