Waec Chemistry 2009 Past Questions and Answers

Question 41:

• WAEC 2009

The product of the reaction between C ₂H₅OH and concentrated H₂SO ₄ at 170^oC is

A. (C₂H₅)₂SO₄
B. CH ₃CH ₂HSO ₄
C. (C₂H₅)₂O
D. CH₂ = CH ₂

Question 42:

• WAEC 2009

When protein is heated to a high temperature it undergoes

A. Condensation
B. Denaturation
C. Hydrolysis
D. Polymerization

Question 43:

• WAEC 2009

What is the molecular formula of a compound with empirical CH₂O and vapour density of 90? [H = 1, C = 12, O = 16]

A. C₄H₈O ₂
B. C₄H ₈O₃
C. C₆H₁₀C₅
D. C₆H₁₂O₆

Question 44:

• WAEC 2009

What is the product of the reaction between propene and 1 mole of hydrogen iodide?

A. CH₃CHICH₃
B. CH ₃CH₂CHI₂
C. CH ₃CH ₂CI₃
D. CH ₃CHICH₂I

Question 45:

• WAEC 2009

Ethanol reacts with excess acidified K₂Cr ₂O₇ to produce

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