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Chemistry questions and answers

Chemistry Questions and Answers

Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.

736.

Consider the following reaction equation:
CuO(s) + H2(g) Cu(s) + H2O(1)

Which substance is oxidized?

A.

Cu

B.

CuO

C.

H2

D.

H2O

Correct answer is C

No explanation has been provided for this answer.

737.

Which of the following statements about an electrochemical cell is correct? Oxidation occurs

A.

At the anode

B.

At the cathode

C.

Through the salt bridge

D.

In the aqueous solution

Correct answer is A

No explanation has been provided for this answer.

738.

A change in the temperature of a saturated solution disturbs the equilibrium between the

A.

Undissolved solute and the solvent

B.

Dissolved solute and the solvent

C.

Dissolved solute and the undissolved solute

D.

Dissolved solute and the solution

Correct answer is C

No explanation has been provided for this answer.

739.

A substance which dissolves readily in organic solvent would

A.

Be a covalent compound

B.

Have strong electrostatic forces of attraction

C.

have a high melting point

D.

Conduct electricity in molten state

Correct answer is A

No explanation has been provided for this answer.

740.

Which of the following compounds is the least soluble in water?

A.

CaCl2

B.

CaSO4

C.

NaCl

D.

Na2SO4

Correct answer is B

No explanation has been provided for this answer.