Jamb Chemistry Past Questions and Answers

Question 1651:

• JAMB 2012

An increase in the pressure exerted on gas at a constant temperature results in

A. A decrease in the number of effective collisions
B. A decrease in volume
C. An increase in the average intermolecular distance
D. An increase in volume

Question 1652:

• JAMB 2012

2H_2(g) + O_2(g) → 2H₂ O_(g)
In the reaction above, what volume of hydrogen would be left over when 300 cm³ of oxygen and 1000 cm³ of hydrogen are exploded in a sealed tube?

A. 200 cm³
B. 400 cm³
C. 600 cm³
D. 700 cm³

Question 1653:

• JAMB 2012

l . Evaporation. ll. Sublimation. lll. Diffusion. IV. Brownian motion.
Which of the above can correctly be listed as evidences for the particulate nature of matter?

A. I and lll only
B. Ll and lV only
C. L, ll and lll only
D. L, ll, lll and lV

Question 1654:

• JAMB 2012

If the elements X and Y have atomic numbers 11 and 17 respectively, what type of bond can they form?

A. Dative
B. Covalent
C. Lonic
D. Metallic

Question 1655:

• JAMB 2012

A hydrogen atom which has lost an electron contains

A. One proton only
B. One neutron only
C. One proton and one neutron
D. One proton, one electron and one neutron