Crude copper can be purified by the electrolysis of CuSO_4(aq) if?

A. platinum electrodes are used

B. the crude copper is made the anode of the cell

C. the crude copper is made the cathode of the cell

D. crude copper electrodes are used

Methylethanoate reacts with ammonia to yield?

A. mettylamine and ethanol

B. ethylamine and methanol

C. methanamide and ethanol

D. ethanamide and methanol

Alkanoates are formed by the reaction of alkanoic acid with?

A. Alkyl halides

B. alkanols

C. ethers

D. sodium

The four classes of hydrocarbons are?

A. ethane, ethene, ethyne and benzene

B. alkanes, alkenes, alkynes and aromatics

C. alkanes, alkenes, alkynes and benzene

D. methane, ethane , propane and butane

Which of the following compounds has the highest boiling point?

A. CH₃CH₂CH₂CH₂HO

B. CH₃CH₂CH₂CHO

C. CH₃CH₂CH₂CH₃

D. CH₃CH₂OCH₂CH₃

Detergents have the general formula?

A. R(CH₂)_nOH

B. RSO₃^-Na⁺

C. RSO^-₂Na⁺

D. RSO₂H

What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?

A. Steam distillation

B. Destructive distillation

C. Liquefaction

D. Hydrolysis

The formula of a compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is~?

A. MX

B. M₃X₄

C. M₄X₃

D. M₃X₂

2.25g of a sample of an oxide of copper on reduction gave 2.0g of copper. 2.50g of another oxide of copper on reduction also gave 2.0g of copper. These results are in accordance with the law of?

A. constant composition

B. conservation of matter

C. multiple proportions

D. definite proportions

One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at s.t.p?

(G.M.V = 22.4 dm³ mol^-1)

A. 112.0 dm³

B. 67.2 dm³

C. 56.0 dm³

D. 44.8 dm³