Jamb Chemistry Past Questions For Year 1998

Question 21

Terylene is synthesized from ethane- 1, 2-diol and benzene - 1, 4-dicarboxylic acid by?

jamb 1998

• A. addition reaction
• B. condensation reaction
• C. elimination reaction
• D. substitution reaction

Question 22

An example of aromatic compound is?

jamb 1998

• A. C₆H₁₃OH
• B. C₆H₁₃CI
• C. C₆H₅OH
• D. C₆H₁₄

Question 23

A mixture of iron and sulphur can be separated by dissolving the mixture in?

jamb 1998

• A. steam
• B. dilute hydrochloric acid
• C. dilute sodium hydroxide
• D. benzene

Question 24

The addition of water to calcium oxide leads to?

jamb 1998

• A. a physical change
• B. a chemical change
• C. the formation of a mixture
• D. an endothermic change

Question 25

If sulphur (IV) oxide and methane are released simultaneously at the opposite ends of a narrow tube, the rates of diffusion Rso₂ and Rch₄ will be in the ratio?

(S = 32, O = 16, C = 12, H = 1)

jamb 1998

• A. 4:1
• B. 2:1
• C. 1:2
• D. 1:4