Jamb Chemistry Past Questions and Answers

Question 2151:

• JAMB 2020

Helium is used in observation of ballons because it is?

A. Light and combustible
B. Light and non-combustible
C. Heavy and combustible
D. Heavy and non-combustible

Question 2152:

• JAMB 2020

32g of anhydrous copper(ii)tetraoxosulphate(vi) dissolved in 1dm\(^3\) of water generated 13.0kj of heat. The heat solution is?

A. 26.0kj/mol
B. 65.0kj/mol
C. 130.0kj/mol
D. 260.0kj/mol

Question 2153:

• JAMB 2020

A gaseous metallic chloride MCl consists of 20.22% of M by mass. The formula of the chloride is?
[ M = 27, Cl = 35.5]

A. MCl
B. MCl\(_2\)
C. MCl\(_3\)
D. M\(_2\)Cl\(_6\)

Question 2154:

• JAMB 2020

What quantity of electricity will liberate 0.125 mole of oxygen molecules during the electrolysis of dilute sodium chloride solution?

A. 24,125 C
B. 48,250 C
C. 72,375 C
D. 96,500 C

Question 2155:

• JAMB 2020

Which of the following types of bonding does not involve the formation of new substances?

A. Metallic
B. Covalent
C. Co-ordinate
D. Electrovalent