Organic Compounds - Jamb Chemistry Past Questions and Answers

Question 126:

• JAMB 1992

An organic compound containing 40.1% carbon and 6.6% hydrogen has an empirical formula of?

A. C₂H₄O₂
B. C₂H₃O₂
C. CH₂O
D. CH₃O

Question 127:

• JAMB 1992

The characteristics reaction of carbonyl compounds is?

A. Substitution
B. Elimination
C. Addition
D. Saponfication

Question 128:

• JAMB 1992

Alkanals can be differentiated from alkanones by reaction with?

A. 2,4-dinitrophenylhydrazine
B. Hydrogen cyanide
C. Sodium hydrogen sulphite
D. Tollen's reagent

Question 129:

• JAMB 1992

An example of a polysaccharides is?

A. —dextrose
B. Mannose
C. Glucose
D. Starch

Question 130:

• JAMB 1992

Which of the following compounds is a secondary alkanol?

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