Jamb Chemistry Past Questions and Answers

Question 651:

• JAMB 1990

The volume occupies by 1.58g of a gas at s.t.p is 500cm³. What is the relative molecular mass of the gas?
(G.M.V at s.t.p = 22.40dm³)

A. 28
B. 32
C. 44
D. 71

Question 652:

• JAMB 1990

Equal volumes of CO,SO₂, and H₂S were released into a room at the same point and time. Which of the following gives the order of diffusion of the gases to the opposite corner of the room?
(S = 32, C = 12, O = 16, N = 14, H = 1)

A. CO, SO₂,NO₂,H₂S
B. SO₂,NO₂,H₂S,CO
C. CO,H₂S,SO₂,NO₂
D. CO,H₂S,NO₂,SO₂

Question 653:

• JAMB 1990

A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that?

A. Collisions are perfectly elastic
B. Forces of repulsion exist
C. Forces of repulsion are in equilibrium
D. Collision are inelastic

Question 654:

• JAMB 1990

.....................P....Q.....R......S
Proton..............13....16....17.....19
Electron............13....16....17.....19
Neutron.............14....16....35.....20
Which of the four atoms P,q,R and in S in the above data can be described by the following properties relative atomic mass is greater than 30 but less than 40; it has an odd atomic number and forms a unipositive ion in solution?

A. P
B. Q
C. R
D. S

Question 655:

• JAMB 1990

Which of the following terms indicates the number of bonds that can be formed by an atom?

A. Oxidation number
B. Valence
C. Atomic number
D. Electronegativity