Waec Chemistry 2005 Past Questions and Answers

Question 6:

• WAEC 2005

An element X has an atomic number of 16. What is its most likely oxidation state in its binary compounds?

A. -3
B. -2
C. +2
D. +4

Question 7:

• WAEC 2005

An element which can exist in two or more forms in the same physical state, exhibits

A. Isotopy
B. Structural isomerism
C. Allotropy
D. Variable valency

Question 8:

• WAEC 2005

Which of the following can be used to predict the type of bonding in HCI?

A. PH value
B. Electronegativity difference
C. Heat of neutralization
D. Heat of solution

Question 9:

• WAEC 2005

Which of the following molecules has a linear structure?

A. NH₃
B. H₂O
C. CO₂
D. CH₄

Question 10:

• WAEC 2005

The volume occupied by a given mass of gas depends on its

A. Diffusion rate
B. Temperature and pressure
C. Degree of solubility
D. Relative density