Jamb Chemistry 2020 Past Questions and Answers

Question 6:

• JAMB 2020

The best treatment for a student who accidentally poured conc tetraoxosulphate(vi) on his skin in the laboratory is to wash his skin with?

A. With cool running water
B. Sodium hydroxide solution
C. Iodine solution
D. Sodium trioxonitrate(v) solution

Question 7:

• JAMB 2020

Which of the gas laws does this graph illustrate?

A. Boyle
B. Charles
C. Gay-Lussac
D. Graham

Question 8:

• JAMB 2020

What are the possible oxidation numbers of an element if its atomic number is 17?

A. -1 and 7
B. -1 and 6
C. -3 and 5
D. -2 and 6

Question 9:

• JAMB 2020

What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?

A. Steam distillation
B. Destructive distillation
C. Liquefication
D. Hydrolysis

Question 10:

• JAMB 2020

Liquid black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the ?

A. Acid
B. Ester of alkanoic acid
C. Alkali
D. Alkanol