Jamb Chemistry 2013 Past Questions and Answers

Question 21:

• JAMB 2013

Calculate the volume in cm³ of oxygen evolved as s.t.p. when a current of 5 A is passed through acidified water for 193s
{F = 96500 Cmol^-1, Molar volume of a gas at s.t.p. = 22.4 dm³}

A. 224.000 dm³
B. 0.056 dm³
C. 0.224 dm³
D. 56.000 dm³

Question 22:

• JAMB 2013

In an endothermic reaction, if there is a loss in entropy the reaction will

A. Be indeterminate
B. Be spontaneous
C. Not be spontaneous
D. Be at equilibrium

Question 23:

• JAMB 2013

the minimum amount of energy required for a reaction to take place is

A. Lattice energy
B. Ionization energy
C. Activation energy
D. Kinetic energy

Question 24:

• JAMB 2013

Which of the following compounds is a neutral oxide?

A. Carbon (IV) oxide
B. Sulphur (Vl) oixide
C. Sulphur (IV) oxide
D. Carbon (ll) oxide

Question 25:

• JAMB 2013

In the laboratory preparation of ammonia, the flask is placed in a slanting position so as to

A. Prevent condensed water from breaking the reaction flask
B. Enable the proper mixing of the reactions in the flask
C. Enhance the speed of the reaction
D. Prevent formation of precipitate