Jamb Chemistry 2014 Past Questions and Answers

Question 41:

• JAMB 2014

The process of converting starch to ethanol is

A. Cracking
B. Distillation
C. Fermentation
D. Oxidation

Question 42:

• JAMB 2014

The polymer used in making car rear lights is

A. Perspex
B. Bakeelite
C. Polystyrene
D. Polyacrylonitrile

Question 43:

• JAMB 2014

CH₃COOC₂H₅(1) + H₂O₍₁₎ ⇌ CH ₃COOH _(aq) + C ₂H ₅OH _(aq)
The purpose of H⁺ in the reaction above is to

A. Increase the yield of products
B. Maintain the solution at a constant PH
C. Increase the rate of the hydrolysis
D. Decrease the rate of the reverse reaction

Question 44:

• JAMB 2014

A hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula.
[C = 12, H = 1]

A. C₂H₆
B. C₃H₈
C. C₃H₄
D. C₆H₆

Question 45:

• JAMB 2014

Polystyrene is widely used as packaging materials for fragile objects during transportation because of its

A. Ligjtness
B. Low density
C. High density
D. High compressibility