Organic Compounds - Jamb Chemistry Past Questions and Answers

Question 171:

• JAMB 1999

When the two end alkyl groups ethyl ethanoate are interchange, the compound formed is known as

A. Methyl ethanoate
B. Ethyl propanaote
C. Methyl propanoate
D. Propyl ethanoate

Question 172:

• JAMB 2000

0.46g of ethanol when burned raised the temperature of 50g of water by 14.3K. Calculate the heat of combustion of ethanol.
[C = 12, O = 16, H = 1, Specific heat capacity of water = 4.2 jg^-1K^-1]

A. +3000 KJ mol^-1
B. +300 KJ mol^-1
C. -300 KJ mol^-1
D. -3000 KJ mol^-1

Question 173:

• JAMB 2000

Unsaturated organic compounds are identified by decolourization of

A. Silver bromine and potassium tetraoxomanganate (VII) solutions
B. Bromine water and acidified potassium tetraoxomanganate (VII) solution
C. Silver bromide solution and bromine water
D. Bromine water and alkaline potassium tetraoxomanganate (VII) solution

Question 174:

• JAMB 2000

The reaction of carbide with water gives

A. Ethyne
B. Ethene
C. Ethane
D. Ethanal

Question 175:

• JAMB 2000

Alkanones are generally obtained by the oxidation of

A. Primary alkanols
B. Secondary alkanols
C. Tertiary alkanols
D. Alkanoic acid