Jamb Chemistry 2003 Past Questions and Answers

Question 41:

• JAMB 2003

The leachate of a certain plant ash is used in local soap making because it contains

A. Sodium chloride and potassium hydroxide
B. Sodium hydroxide
C. Potassium hydroxide
D. Soluble carbonates and hydrogen carbonates

Question 42:

• JAMB 2003

The formula for ethyl butanoate is

A. C₃H₇COOC₂H₅
B. C₂H₅COOC₃H₇
C. C₄H₉COOC₂H₅
D. C₂H₅COOC₄H₉

Question 43:

• JAMB 2003

The type of reaction that is peculiar to benzene is

A. Addition
B. Hydrolysis
C. Polymerization
D. Substitution

Question 44:

• JAMB 2003

Ethanol reacts with excess acidified K₂Cr₂O to produce

A. Ethanedioic acid
B. Ethanal
C. Ethylethanoate
D. Ethanoic acid

Question 45:

• JAMB 2003

A compound contains 40.0% carbon 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, find the molecular formula.
[H = 1, C = 12, O = 16]

A. CH₂O
B. C₃H₆O₃
C. C₆H₁₂O₆
D. C₆H₁₂O₃