Jamb Chemistry 2019 Past Questions and Answers

Question 111:

• JAMB 2019

What mass of magnesium would be obtained by passing a current of 2 amperes for 2 hours 30 mins, through molten magnesium chloride?
[1 faraday = 96500C, Mg = 24]

A. 1.12g
B. 4.48g
C. 1.80g
D. 2.00g

Question 112:

• JAMB 2019

Which important nitrogen-containing compound is produced in Haber's process?

A. NH\(_3\)
B. NO\(_2\)
C. NO
D. HNO\(_3\)

Question 113:

• JAMB 2019

Elements in the periodic table are arranged in the order of their

A. Atomic numbers
B. Metallic character
C. Mass number
D. Relative atomic mass

Question 114:

• JAMB 2019

What volume of 0.100M sodium trioxonitrate (V) solution contains 5g of solute.
[Na = 23, N = 14, O = 16]

A. 1.7 litres
B. 0.420 litres
C. 0.588 litres
D. 2.35 litres

Question 115:

• JAMB 2019

The two ions responsible for hardness in water are

A. Ca\(^{2+}\) and / or Mg\(^{2+}\)
B. K\(^+\) and / or Mg\(^{2+}\)
C. Ca\(^{2+}\) and / or Li\(^+\)
D. Ca\(^{2+}\) and / or Na\(^+\)