Post Utme Chemistry Past Questions and Answers

Question 316:

Oil spillage in pond and creek can be cleared by ____________

A. Burning of the oil layer
B. Spraying with detergent
C. Spraying with common salt
D. Spraying with oil

Question 317:

Which of the following is a chemical compound?

A. Soap
B. Milk
C. Urine
D. Gold

Question 318:

Crystallization is a separation method used ____________

A. Where purity of the product is important
B. Where beauty of the product is important
C. Where the product is a solid
D. Where the product cannot be
destroyed by heat

Question 319:

Which hydroxide dissolves in water to form an alkaline

A. Aluminium hydroxide
B. Calcium hydroxide
C. Copper hydroxide
D. Iron hydroxide

Question 320:

A mixture contains 20cm3 of hydrogen, 35cm³ of oxygen, 15cm³ of carbon dioxide and 10cm³of nitrogen at S.T.P which of the following gives the mole fraction of hydrogen in this mixture?

A. 0.02
B. 0.16
C. 0.20
D. 0.25
E. 2.0