Question 481:

• JAMB 1986

Which of the following are made by the process of polymerization?

A. Nylon and soap
B. Nylon and artificial rubber
C. Soap and butane
D. Margarine and nylon

Question 482:

• JAMB 1986

Starch can be converted to ethyl alcohol by?

A. Distillation
B. Fermentation
C. Isomerization
D. Cracking

Question 483:

• JAMB 1986

The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as?

A. Brownian movement
B. Condensation
C. Evaporation
D. Liquefaction

Question 484:

• JAMB 1986

What mass of a divalent metal M (atomic mass = 40) would react with excess hydrogen gas measured at S.T.P?

A. 8.0 g
B. 4.0 g
C. 0.8 g
D. 0.4 g

Question 485:

• JAMB 1986

In the solubility curve above, water at 98^oC is saturated with KCL and KCIO ₃ What is the percentage of KCL impurity in the crystals formed when the solution is cooled to 30 ^oC?

A. 51.5
B. 45.5
C. 34.5
D. 26.5