Post Utme Chemistry Past Questions and Answers

Question 401:

Which of the following, when heated strongly in air will leave a metal as residue?

A. Sodium trioxnirate (V)
B. Potassium trioxinitrate (V)
C. Silver trioxonitrate (V)
D. Lead trioxonitrate (V)

Question 402:

____________ Which of the following methods is suitable for the preparation of an insoluble salt?

A. Action of an acid on a metal
B. Double decomposition
C. Neutralization
D. Action of an acid on a trioxocarbonate
\((\mathrm{IV})\) salt

Question 403:

The shape of the s-orbital is ____________

A. Spherical
B. Elliptical
C. Spiral
D. Circular

Question 404:

A carcinogenic substance is ____________

A. Asbestos dust
B. Sawdust
C. Nitrogen (II) oxide
D. Carbon (II) oxide

Question 405:

In the electrolysis of brine, the anode is ____________

A. Platinum
B. Copper
C. Zinc
D. Carbon