Jamb Chemistry Past Questions and Answers

Question 1691:

• JAMB 2012

Ethanol reacts with concentrated tetraoxosulphate (V) acid at a temperature above 170 ^oC to form

A. Ethanone
B. Ethene
C. Ethyne
D. Ethanal

Question 1692:

• 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 1693:

• 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 1694:

• 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 1695:

• 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