Jamb Chemistry 2007 Past Questions and Answers

Question 26:

• JAMB 2007

Which experiment led to the measurement of the charge on an electron?

A. Mass spectrometric experiment
B. Oil-drop experiment
C. Scattering α - particles
D. Discharge-tube experiment

Question 27:

• JAMB 2007

What is the volume of oxygen required to burn complete 45 cm³ of methane at s.t.p?

A. 135.0 cm³
B. 180.0 cm³
C. 45.0 cm³
D. 90.0 cm³

Question 28:

• JAMB 2007

How many electrons are in the L shell of ³¹₁₅P?

A. 5
B. 8
C. 18
D. 2

Question 29:

• JAMB 2007

If the electron configuration of a element is p1s² 2s² 2P⁵, how many unpaired electron are there?

A. 2
B. 8
C. 1
D. 4

Question 30:

• JAMB 2007

Which of the following decrease when a given mass of gas is compressed to half its initial volume?

A. Atomic radius of each
B. Average intermolecular distance
C. Frequency of collisions
D. Number of molecules presents