Organic Compounds - Jamb Chemistry Past Questions and Answers

Question 111:

• JAMB 1990

Use the graph above to answer this question. The structure of cis-2-butene is

A. A
B. B
C. C
D. D

Question 112:

• JAMB 1990

What is the IUPAC name for the hydrocarbon

A. 2-ethyl-4-methylpent-2-ene
B. 3,5-dimethylhex-3-ene
C. 2,4-dimethylhex 3-ene
D. 2-methyl-4-ethylpent-3-ene

Question 113:

• JAMB 1991

The solubility of copper (II) tetraoxosulphate (Iv) is 75g in 100g of water at 100°C and 25g in 100g of water at 30°C. What mass of the salt would crystallize, if 50g of copper (II) tetraoxosulphate (VI) solution saturated at 100°C were cooled to 30°C ?

A. 57.5
B. 42.2
C. 28.6
D. 14.3

Question 114:

• JAMB 1991

How many structural isomers can be written for the alkyl bromide, C₄H₉Br?

A. 3
B. 4
C. 6
D. 8

Question 115:

• JAMB 1991

Which of the following compounds can exist as geometric isomers?

A. 2-methylbut-2ene
B. But-2-ene
C. But-1-ene
D. CI-C-Br