Jamb Chemistry 2020 Past Questions and Answers

Question 26:

• 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 27:

• 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 28:

• 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

Question 29:

• JAMB 2020

An organic compound that does not undergo a reaction with both hydrogen cyanide and hydroxylamine can be?

A. Alkene
B. Alkanal
C. Alkanone
D. Alkanoic Acid

Question 30:

• JAMB 2020

The substance often used for vulcanization of rubber is?

A. Chlorine
B. Hydrogen peroxide
C. Sulphur
D. Tetraoxosulphate(vi) acid