Waec Chemistry 2016 Past Questions and Answers

Question 36:

• WAEC 2016

The quality of electricity required to discharge 1 mole of univalent ion is

A. 9600C
B. 48250C
C. 96500C
D. 193000C

Question 37:

• WAEC 2016

Chlorine water is used as a bleaching agent because it is

A. An acidic solution
B. An alkaline solution
C. An oxidizing agent
D. A reducing agent

Question 38:

• WAEC 2016

Which of the following substances is a non-electrolyte?

A. H₂SO₄
B. CH₃COOH
C. C₆H₁₂O₆
D. NH₄Cl

Question 39:

• WAEC 2016

The oxidation number of sulphur is +4 in

A. Na₂S>₂O₃
B. H₂SO₃
C. H₂SO₄
D. SO₃

Question 40:

• WAEC 2016

Consider the following ionic equation:
Cr₂O₇^2- + 14H⁺ + ne^- \(\to\) 2Cr³⁺ + 7H₂O.
The value of n in the equation is_______?

A. 7
B. 6
C. 3
D. 2