Post Utme Chemistry Past Questions and Answers

Question 771:

Which of these is used to hasten the ripening of fruits?

A. Ethyne
B. Ethane
C. Ethanol
D. Ethene

Question 772:

The gasification of coke is used in the manufacture of ____________

A. Producer gas
B. Natural gas
C. Synthetic gas
D. Industrial gas

Question 773:

Polyvinyl chloride is used in the production of ____________

A. Pipes
B. Gass
C. Alloy
D. Ceramics

Question 774:

The rate of reaction usually decrease with a decrease in a concentration of reactant because ____________

A. Kinetic energy decreases
B. Temperature increases
C. Speed increases
D. Reactant collision decreases

Question 775:

Which of the following is a physical change?

A. Freezing ice cream
B. Dissotving calcium in water
C. Burning kerosene
D. Exposing white phosphorus to air