Chemistry 2007 Waec Past Questions and Answers

Question 26 :

• WAEC 2007

What product is formed at the cathode during the electrolysis of concentrated sodium chloride solution using carbon electrodes?

A. Chlorine
B. Hydrogen
C. Oxygen
D. Sodium

Question 27 :

• WAEC 2007

Which of the following substances is suitable solvent for perfumes?

A. Benzene
B. Ethanol
C. Turpentine
D. Water

Question 28 :

• WAEC 2007

The complete hydrogenation of C ₆
H ₆ in the presence of nicked catalyst at 200^oC gives

A. C₆H₈
B. C ₆H₁₀
C. C ₆H ₁₂
D. C ₆H ₁₄

Question 29 :

• WAEC 2007

Which of the following pairs of substances can be distinguished by use of NaHCO₃ solution?

A. CH ₃CH₂OH and HCOOCH₃
B. CH ₃CH₂OH and CH₃COOH
C. CH₃COOH and HCOOH
D. CH ₃CH₂OH and CH₃OH

Question 30 :

• WAEC 2007

Alkenes undergo the following reactions except

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