Waec Chemistry 2020 Past Questions and Answers

Question 11:

• WAEC 2020

The most suitable process of obtaining water from an aqueous solution of sugar i

A. Crystallization
B. Distillation
C. Filtration
D. Decantation

Question 12:

• WAEC 2020

Group VIl elements in their combined states are called?

A. Halogens
B. Anions
C. Halide
D. Cations

Question 13:

• WAEC 2020

When an ionic bond is broken, bonding electrons are

A. Shared between participating atoms
B. Gained by the most electropositive atom
C. Gained by the most electronegative atom
D. Lost by both participating atoms.

Question 14:

• WAEC 2020

The oxidation state of chlorine in NaClO\(_3\) is?

A. +1
B. +3
C. +5
D. +6

Question 15:

• WAEC 2020

A balanced chemical equation is based on the law of?

A. Periodicity
B. Constant composition
C. Multiple proportion
D. Conservation of mass