Jamb Chemistry 2003 Past Questions and Answers

Question 16:

• JAMB 2003

The structural component that makes detergent dissolve more quickly in water than soap is

A. -SO₃- Na⁺
B. -COO-Na^-
C. -SO₄- Na⁺
D. -COO-K⁺

Question 17:

• JAMB 2003

A liquid that will dissolve fat is?

A. Hydrochloric acid
B. Calcium hydroxide
C. Kerosene
D. Water

Question 18:

• JAMB 2003

What mass of K₂CrO₄ is required to prepare 250cm³ of 0.020 mol dm³ solution?
[K₂CrO₄ = 194.2g mol^-1]

A. 0.97g
B. 9.70g
C. 19.42g
D. 97.10g

Question 19:

• JAMB 2003

Farmlands affected by crude-oil spillage can be decontaminated by

A. Adding acidic solution
B. Using aerobic bacteria
C. Pouring water on the affected water area
D. Burning off the oil from the area

Question 20:

• JAMB 2003

When 10g of sodium hydroxide is dissolved in 1000cm³ of water, the sodium formed is approximately
[Na = 23, H = 1, O = 16]

A. 0.01 mol dm^-3
B. 0.10 mol dm^-3
C. 0.25 mol dm^-3
D. 0.50 mol dm^-3