Post Utme Chemistry Past Questions and Answers

Question 481:

Oxygen gas is collected in the laboratory by ____________

A. Upward displacement of ai
B. Upward displacement of wate
C. Downward displacement of wate
D. Using a gas laye

Question 482:

CuO + H₂ > Cu + H₂O In the reaction above CuO is ____________

A. Oxidized to coppe
B. Reduced to coppe
C. Chemically converted to coppe
D. Reversed to coppe

Question 483:

Isotopes are atoms if the same element with ____________

A. Different protons
B. Mass above 50
C. Inter convertible masses
D. Different masses

Question 484:

A reaction is in equilibrium when ____________

A. The rate of the forward reaction is equal to the rate of the reverse reaction
B. The reaction rates of the forward and backward reaction are zero
C. Its rate is reversible
D. It does not produce ant product again

Question 485:

The boiling point of a liquid such as methanol is the temperature at which its ____________

A. Vapour pressure is equal to 1 atmosphere
B. Vapour pressure is equal to the atmospheric pressure
C. Reactants and products are at standard states
D. Vapour pressure doubles atmospheric pressure