Post Utme Ahmadu Bello University Chemistry Past Questions and Answers

Question 1:

Which of the following in a molar solution would be the product conductor of electricity?

A. Ammonia
B. Sodium chloride
C. Hydrochloric acid
D. Zinc tetraoxosulphate (VI)

Question 2:

How many moles of oxygen atoms are presented in 4.0g of the gas. (O= 16)

A. 0.25
B. 0.50
C. 1.00
D. 4.00

Question 3:

In the periodic table, the entire element within the same group has the same ____________

A. Atomic number
B. Number of electrons in the nuclei of their atoms
C. Number of electron available for bonding
D. Number of isotopes

Question 4:

How many atoms are there in 0.3mole of an element?
{Avogadro's constant =6.0 x1023)

A. \(2.0 x 1024\)
B. \(1.8 x1024\)
C. \(1.8 x1023\)
D. \(3.0 x 1022\)

Question 5:

Milk exposed to air for a few days tastes sour due to the presence of ____________

A. Ethanoic acid
B. Citric acid
C. Lactic acid
D. Tartaric acid