Post Utme Chemistry Past Questions and Answers

Question 601:

How many moles of oxygen are required to burn one mole of C₆H₁₂ completely?

A. 5
B. 6
C. 7
D. 8
E. 9

Question 602:

The maximum number of electrons that can be accommodated in the shall having the principal quantum number 3 is ____________

A. 3
B. 6
C. 9
D. 18
E. 32

Question 603:

2Na + 2H20 2NaOH + H2. In the equation above, what mass in gram of sodium is required to produce, 0.40g of sodium hydroxide?
(H =1, 0 =16, Na=23).

A. 0.12
B. 0.23
C. 46
D. 2.30
E. 4.60

Question 604:

The number of hydrogen ions in 5.3g of trioxonitrate (v) acid is (H = 1, N =14, 0 =16), (Avogadro’s No = 6.02x 1023).

A. 6.02x10²³
B. 6.02x 10²²
C. 6.02x10²⁴
D. 16.02x10²⁵

Question 605:

Alkanes react with halogens mainly by ____________

A. Oxidation
B. Polymerization
C. Addition
D. Substitution