Jamb Chemistry 2013 Past Questions and Answers

Question 1:

• JAMB 2013

The presence of an impurity in substance will cause the melting point to

A. Be zero
B. Reduce
C. Increase
D. Be stable

Question 2:

• JAMB 2013

The presence of an impurity in substance will cause the melting point to

A. Be zero
B. Reduce
C. Increase
D. Be stable

Question 3:

• JAMB 2013

What volume of carbon (ll) oxide is produced by reacting excess carbon with 10 dm³ of oxygen?

A. 5 dm ³
B. 20 dm ³
C. 15 dm ³
D. 10 dm ³

Question 4:

• JAMB 2013

The rate of diffusion of a gas Y is twice that of Z If the relative molecular mass of Y is 64 and the two gases diffuse under the same conditions, find the relative molecular mass of Z

A. 32
B. 4
C. 8
D. 16

Question 5:

• JAMB 2013

The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is

A. Carbon-14
B. Phosphorus-32
C. Cobalt-60
D. Iodine-131