Organic Compounds - Jamb Chemistry Past Questions and Answers

Question 156:

• JAMB 1998

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)

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

Question 157:

• JAMB 1998

A gas that turns a filter paper previously soaked in lead ethanoate solution black is?

A. Hyrogen chloride
B. Hydrogen sulphide
C. Sulphur (IV) oxide
D. Sulphur (VI) oxide

Question 158:

• 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 159:

• 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 160:

• 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