Waec Chemistry 2020 Past Questions and Answers

Question 1:

• WAEC 2020

Which of the following substances is an example of a fine chemical?

A. Sodium hydroxide
B. Hydrochloric acid
C. Ethylene
D. Ammonia

Question 2:

• WAEC 2020

Which of the following substances is an example of a fine chemical?

A. Sodium hydroxide
B. Hydrochloric acid
C. Ethylene
D. Ammonia

Question 3:

• WAEC 2020

The IUPAC name of the compound represented by the structure below is ?

A. 2- chloro but-I ,3-diene.
B. But-1,3-chlorodiene.
C. 2-chloro but-diene.
D. 3 -chloro but -1.3-diene.

Question 4:

• WAEC 2020

Which or the following substances is a polypeptide?

A. Starch
B. Glycogen
C. Protein
D. Fats

Question 5:

• WAEC 2020

Which or the following products could be formed during incomplete combustion of a hydrocarbon.
i.Carbon ii. Hydrogen III. Carbon (Il) oxide

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