Jamb Chemistry 2002 Past Questions and Answers

Question 11:

• JAMB 2002

The Arrhenius equation expresses the relationship between the speed of a reaction and its

A. Molecular collision
B. Heat of reaction
C. Catalyst
D. Activation energy

Question 12:

• JAMB 2002

When dissolved in water, NaOH flakes show

A. An endothermic change
B. An exothermic change
C. A slow reaction
D. A rapid reaction

Question 13:

• JAMB 2002

CU₂S_(s) + O_2(g) → 2CU_(s) + SO_2(g)
What is the change in the oxidation number of copper in the reaction above?

A. +1 to 0
B. 0 to +2
C. +2 to +1
D. 0 to +1

Question 14:

• JAMB 2002

The product of the electrolysis of dilute sodium hydroxide using platinum electrodes are

A. Hydrogen and oxygen gases
B. Water and hydrogen gas
C. Water and sodium metal
D. Sodium metal and oxygen gas

Question 15:

• JAMB 2002

The solubility of a salt of molar mass 101g at 20^oC is 0.34 mol dm^-3. If 3.40g of the salt is dissolved completely in 250cm³ of water in a beaker, the resulting solution is

A. A suspension
B. Saturated
C. Unsaturated
D. Supersaturated