Waec Chemistry 2013 Past Questions and Answers

Question 1:

• WAEC 2013

Which of the following instruments is used in detecting the presence of radiation?

A. Cathode ray tube
B. Geiger-Muller counter
C. Mass spectrometer
D. X-ray tube

Question 2:

• WAEC 2013

Which of the following instruments is used in detecting the presence of radiation?

A. Cathode ray tube
B. Geiger-Muller counter
C. Mass spectrometer
D. X-ray tube

Question 3:

• WAEC 2013

The molecule which has a linear shape is

A. CH₄
B. NH₃
C. H₂S
D. CO₂

Question 4:

• WAEC 2013

The formula of the compound formed between a trivalent metal, M and a divalent non-metal, Y is

A. M₂Y₃
B. M₃Y₂
C. MY
D. M₃Y

Question 5:

• WAEC 2013

An atom of an element X gains two electrons. The symbol of the ion formed is

A. X ⁺
B. X ²⁺
C. X ^2-
D. X ^-