Jamb Chemistry Past Questions and Answers

Question 1956:

• JAMB 2017

The furring of kettles is caused by the presence in water of

A. Calcium hydrogentrioxocarbonate (IV)
B. Calcium trioxocarbonate (IV)
C. Calcium tetraoxosulphate (VI)
D. Calcium hydroxide

Question 1957:

• JAMB 2017

Water for town supply is chlorinate to make it free from

A. Bad colour
B. Bacteria
C. Temporary hardness
D. Permanent hardness

Question 1958:

• JAMB 2017

Ca(OH)_2(s) + 2NH₄Cl_(g) → CaCl_2(s) + 2H₂O_2(l) + X. In the reaction above X is

A. NO₂
B. NH₃
C. N₂O
D. NO₂

Question 1959:

• JAMB 2018

A given amount of gas occupies 10.0dm5 at 4atm and 273°C. The number of moles of the gas present is [Molar volume of gas at s.t.p = 22.4dm\(^3\)]

A. 0.89 mol
B. 1.90 mol
C. 3.80 mol
D. 5.70 mol

Question 1960:

• JAMB 2018

A given amount of gas occupies 10.0dm5 at 4atm and 273°C. The number of moles of the gas present is [Molar volume of gas at s.t.p = 22.4dm\(^3\)]

A. 0.89 mol
B. 1.90 mol
C. 3.80 mol
D. 5.70 mol