Waec Chemistry 2017 Past Questions and Answers

Question 16:

• WAEC 2017

The oxidation number of X in \(XO_{4}^{3+}\) is

A. +1
B. +3
C. +4
D. +5

Question 17:

• WAEC 2017

The ionization energy is affected by the following factors except

A. Distance of the outermost electron(s) from the nucleus
B. Size of the positive nuclear charge
C. Ability to attract shared electron(s)
D. Screening effect of the inner electron(s)

Question 18:

• WAEC 2017

Which of the following statements is correct?

A. Covalent compounds would readily ionize in solution
B. Covalent compounds consist of ions
C. Hydrogen bond is formed between a metal and a non-metal
D. Ionic compounds in solution would conduct electricity

Question 19:

• WAEC 2017

The bond angle in tetrahedral molecules such as tetrachloromethane is

A. 180.0°
B. 109.5°
C. 105.5°
D. 90.0°

Question 20:

• WAEC 2017

The properties of a good primary standard include the following except

A. High molecular mass
B. Low molecular mass
C. High degree of purity
D. Readily available