Water - Chemistry Jamb Past Questions and Answers

Question 86 :

• 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 87 :

• 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 88 :

• JAMB 2018

Which of these sources of water may likely contain the least concentration of Ca\(^{2+}\) and Mg\(^{2+}\)?

A. Spring water
B. River water
C. Tap water
D. Sea water

Question 89 :

• JAMB 2018

The conductivity of an acid solution depends on the

A. Amount of ions present and their mobilities
B. Mobilities of the ions present
C. Amount of ions present
D. Temperature of the solution

Question 90 :

• JAMB 2018

Which of the following metals cannot replace hydrogen from water or steam?

A. Sodium
B. Magnesium
C. Iron
D. Copper