Jamb Chemistry Past Questions and Answers

Question 1986:

• JAMB 2018

What volume of oxygen will remain after reacting 8cm of hydrogen gas with 20cm of oxygen gas

A. 10cm\(^3\)
B. 12cm\(^3\)
C. 14cm\(^3\)
D. 16cm\(^3\)

Question 1987:

• JAMB 2018

If one of the following oxides is heated with hydrogen or carbon using a bunsen burner. it is not reduced to the metal, Which one is it?

A. Lead oxide
B. Magnesium oxide
C. Copper oxide
D. Tin oxide

Question 1988:

• JAMB 2018

The lUPAC name for

A. 1-methyl pentane
B. 3-methylbutane
C. 2-methylbutane
D. 1-dimethyl propane

Question 1989:

• JAMB 2018

An aqueous solution of a metal salt, M. gives a white precipitate with NaOH which dissolves in excess NaOH. With aqueous ammonia, the solution of M also gives a white precipitate which dissolves in excess ammonia Therefore the cation in M is

A. Zn
B. Ca
C. Al
D. Po

Question 1990:

• JAMB 2018

What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution? [Na = 23, O =16, H = 1]

A. 0.40 moldm\(^{-3}\)
B. 0.50 moldm\(^{-3}\)
C. 0.05 moldm\(^{-3}\)
D. 0.30 moldm\(^{-3}\)