Waec Chemistry 2016 Past Questions and Answers

Question 46:

• WAEC 2016

Which of the following compounds is/are secondary alkanols?
i) CH₃CH(CH₃)CH₃OH
ii) CH₃CH₂CH(OH)CH₃
iii) CH₃C(OH)(CH₃)CH₃

A. I only
B. II only
C. I and III only
D. II and III only

Question 47:

• WAEC 2016

Consider the following reaction equation
C₂H_4(g) + 3O_2(g) \(\to\) 2CO_2(g) + 2H₂O_(l).
The volume of oxygen at s.t.p that will be required to burn 14g of ethene is
[C₂H₄ = 28; Molar volume of gas at s.t.p = 22.4dm³

A. 64.2dm³
B. 33.6dm³
C. 11.2dm³
D. 3.73dm³

Question 48:

• WAEC 2016

Which of the following sources of energy contributes to green-house effect?

A. Natural gas
B. Nuclear
C. Wind
D. Solar

Question 49:

• WAEC 2016

A consequences of global warming is

A. Air pollution
B. Flooding
C. Increased humidity
D. Water pollution

Question 50:

• WAEC 2016

Which of the following metals is common to both brass and bronze?

A. Aluminium
B. Copper
C. Lead
D. Iron