Waec Chemistry 2017 Past Questions and Answers

Question 21:

• WAEC 2017

The use of diamond in abrasives is due to its

A. High melting point
B. Hardness
C. Octahedral shape
D. Durability

Question 22:

• WAEC 2017

Which of the following statements about endothermic reaction is correct?

A. Activation energy is high
B. A catalyst is required
C. It occurs reversibly
D. Heat energy is absorbed

Question 23:

• WAEC 2017

A 0.1\(moldm^{-3}\) solution of sodium hydroxide was diluted with distilled water to 0.001\(moldm^{-3}\). What is the dilution factor?

A. 1000.00
B. 100.00
C. 10.00
D. 0.01

Question 24:

• WAEC 2017

Graphite and Diamond are similar in that they

A. Have octahedral shape
B. Have same density
C. Form carbon(IV) oxide on combustion
D. Conduct electricity

Question 25:

• WAEC 2017

In a saturated solution at a given temperature, the undissolved solutes are in equilibrium with

A. The solvent
B. Dissolved solute particles
C. The saturated solution
D. Insoluble solute particles