Post Utme Chemistry Past Questions and Answers

Question 101:

Which of the following elements will burn in excess oxygen to form a product that is neutral to litmus?

A. Carbon
B. Hydrogen
C. Sulphur
D. Sodium

Question 102:

A current was passed for 10 mins and 0.2 mole of Cu was deposited. How many grams of Ag will it deposit? (Cu = 64, Ag = 108)

A. \(43.2 \mathrm{~g}\)
B. \(21.6 \mathrm{~g}\)
C. \(10.8 \mathrm{~g}\)
D. \(5.4 \mathrm{~g}\)

Question 103:

Pollution of underground water by metal ions is very likely in a soil that has high ____________

A. Acidity
B. Alkalinity
C. Chloride content
D. Nitrate content

Question 104:

11 . Producer gas is a gas with low calorific value beçạse it contains more ____________

A. \(\mathrm{CO}_{2}\) than \(\mathrm{O}_{2}\)
B. \(\mathrm{N}_{2}\) than \(\mathrm{CO}\)
C. \(\mathrm{CO}_{2}\) than \(\mathrm{N}_{2}\)
D. \(\mathrm{N}_{2}\) than \(\mathrm{CO}_{2}\)

Question 105:

For most reversible reactions, ____________

A. The reaction rate increase with time
B. The reaction rate decreases with time
C. The rate stabilizes with time
D. The rate produces a curve with time