Which of the following represents saponification?

• A. Reaction of carboxylic acids with sodium hydroxide
• B. Reaction of alkanoates with acid
• C. Reaction of alkanoates with alcohols
• D. Reaction of alkanoates with sodium hydroxide

Carbon is tetravalent because

• A. The electrons in both the 2s and 2p orbitals are equivalent
• B. The electrons in all the orbitals of carbon are equivalent
• C. The 2s and 2p atomic orbitals hybridize
• D. All the atomic orbitals of carbon hybridize

A current of 4.0 amperes was passed through copper (ll) tetraoxosulphate (IV) solution for one hour using copper electrodes. What was the mass of copper deposited? (Cu = 64, 1F = 96500 C)

• A. 3.2g
• B. 4.8g
• C. 6.4g
• D. 48g

How many carbon atoms are present in one molecule of 2-methylpropane?

• A. 2
• B. 3
• C. 4
• D. 5

Which of the following statements is not correct?

• A) Carbon exhibits allotropy
• B) Sulphur exhibits allotropy
• C) Chlorine exhibits allotropy
• D) Hydrogen is a gas

Which of the following is NOT implicated as a major cause of global warming?

• A) NO₂
• B) CO₂
• C) CFCl₃
• D) CF₂Cl₂

The liquid product of the destructive distillation of coal is

• A. kerosene
• B. ethanol
• C. ammoniacal liquor
• D. paraffin oil

Given that the order of reactivity of four metals is P>Q>R>S, which of the following reactions is feasible?

• A. S⁺ P⁺ → P⁺ S⁺
• B. Q⁺ S⁺ → S⁺ Q⁺
• C. R⁺ P⁺ → P⁺ R⁺
• D. S⁺ Q⁺→ Q⁺ S⁺

Cancerous growths are cured by exposure to

• A. γ - rays
• B. β - rays
• C. α - rays
• D. infrared rays

The following are properties of transition metals except

• A. variable oxidation states
• B. tendency to form complext ions
• C. formation of coloured ions
• D. low melting points