Post Utme Chemistry Past Questions and Answers

Question 891:

The properties of electrovalent compounds include the following except ____________

A. A high melting and boiling point
B. Conduction of electricity in the molten state
C. High volatility at room temperature
D. Ionization of aqueous solution
E. Decomposition of their solutions by electric current

Question 892:

Alkanes are used mainly ____________

A. In the production of plastics
B. As domestic and industrial fuels
C. In the textile industry
D. In the hydrogenation of oils
E. As line chemicals

Question 893:

Which of the following solids has a network structure ____________

A. Diamond
B. Iodine
C. Sulphur
D. Graphite
E. Iron

Question 894:

Which of the following separation is routine applied in the petroleum industry?

A. Filtration
B. Chromatography
C. Fractional crystallization
D. Evaporation
E. Fractional distillation

Question 895:

Which of the following observation is not correct about the reaction of sodium metal with cold water?

A. The reaction is spontaneous
B. The reaction is endothermic
C. Hydrogen is produced
D. The sodium melts and dissolves
E. The resultant solution is alkaline