Post Utme Chemistry Past Questions and Answers

Question 626:

Which of the following processes leads to increase in entropy?

A. Mixing a sample of NaCl and sand
B. Condensation of water vapour
C. Boiling a sample of water
D. Cooling a saturated solution

Question 627:

Sulphur exists in six forms in the solid state.
This property is known as ____________

A. Ismoerism
B. Allotropy
C. Isotopy
D. Isomorphism

Question 628:

Which of the following compounds will impart a brick-red colour to a non-luminous Bunsen Flame?

A. NaCl
B. NCl
C. CaCl2
D. MgCl2

Question 629:

Which of the following types of bonding does not involve the formation of new substances?

A. Metallic
B. Covalent
C. Co-ordinate
D. Electrovalent

Question 630:

The knowledge of half-life can be used to ____________

A. Create an element
B. Detect an element
C. Split an element
D. Irradiate an element