Jamb Chemistry 2018 Past Questions and Answers

Question 26:

• JAMB 2018

Suitable reagents for the laboratory preparation nitrogen are

A. Sodium dioxonitrate(III) and ammonium chloride
B. Sodium trioxonitrate(V) and ammonium chloride
C. Sodium chloride and ammonium trioxonitrate(V)
D. Sodium chloride and ammonium di-ozonitrate(III)

Question 27:

• JAMB 2018

The number of electrons in the valence shell of an element of atomic number 14 is?

A. 1
B. 2
C. 3
D. 4

Question 28:

• 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 29:

• 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 30:

• JAMB 2018

The lUPAC name for

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