Jamb Chemistry 1988 Past Questions and Answers

Question 31:

• JAMB 1988

One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at s.t.p?
(G.M.V = 22.4 dm³ mol^-1)

A. 112.0 dm³
B. 67.2 dm³
C. 56.0 dm³
D. 44.8 dm³

Question 32:

• JAMB 1988

An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?

A. Average velocity of the molecules
B. Number of collisions between the molecules
C. Density of the molecules
D. Free mean path between each molecules and other

Question 33:

• JAMB 1988

The forces holding naphthalene crystals together can be overcome when naphthalene is heated to a temperature of 354K resulting in the crystal to melting. These forces are known as?

A. Coulombic
B. Ionic
C. Covalent
D. Van der waals

Question 34:

• JAMB 1988

A metallic ion X²⁺ with an inert gas structure contains 18 electrons. How many protons are there in this ion?

A. 20
B. 18
C. 16
D. 2

Question 35:

• JAMB 1988

Which of the following physical properties decreases across the Periodic Table?

A. Ionization potenial
B. Electron affinity
C. Electronegativity
D. Atomic radius