Jamb Chemistry 2017 Past Questions and Answers

Question 36:

• JAMB 2017

The densities of two gases, X and Y are 0.5gdm^-3 and 2.0gdm^-3 respectively. What is the rate of diffusion of X relative to Y?

A. 0.1
B. 0.5
C. 2.0
D. 4.0

Question 37:

• JAMB 2017

The carbon atoms on ethane are

A. Sp² hybridized
B. Sp³ hybridized
C. Sp⁴ hybridized
D. Sp hybridized

Question 38:

• JAMB 2017

According to Charle's law, the volume of a gas becomes zero at

A. −100°c
B. −273°c
C. −373°c
D. 0°c

Question 39:

• JAMB 2017

An oxide XO₂ has a vapour density of 32. What is the atomic mass of X?

A. 20
B. 32
C. 14
D. 12

Question 40:

• JAMB 2017

The gas that can be collected by downward displacement of air is

A. Chlorine
B. Sulphur (IV) oxide
C. Carbon (IV) oxide
D. Ammonia