Jamb Chemistry 1998 Past Questions and Answers

Question 31:

• JAMB 1998

One mole of hydrocarbon contains 6g of hydrogen. If the molecular weight is 54, the hydrocarbon is an?

A. Alkanone
B. Alkane
C. Alkene
D. Alkyne

Question 32:

• JAMB 1998

On cracking medicinal paraffin, a gas is evolved which gives a pop sound with a lighted splinter and an oily liquid which decolourizes bromine solution is also obtained. The products of the cracking are ?

A. Carbon (IV) oxide and alkyne
B. Carbon (ll) oxide and alkene
C. Hydrogen gas and alkene
D. Hydrogen gas and alkane

Question 33:

• JAMB 1998

How many structural isomers can be drawn for the non-cyclic alkanol with molecular formula C ₄H₁₀O?

A. 1
B. 2
C. 3
D. 4

Question 34:

• JAMB 1998

An example of aromatic compound is?

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

Question 35:

• JAMB 1998

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

A. Addition reaction
B. Condensation reaction
C. Elimination reaction
D. Substitution reaction