Jamb Chemistry 1980 Past Questions and Answers

Question 11:

• JAMB 1980

How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm³ of 6M HCl?
(Mg=24, H=1, Cl=35.5)

A. 1.2 g
B. 0.7 g
C. 0.5 g
D. 0.3 g
E. 0.12 g

Question 12:

• JAMB 1980

Which of the following statements is an exception in the assumptions of the kinetic theory of gases?

A. Gases are composed of many elastic particles
B. The particles are of negligible size
C. The particles are in constant random motion
D. The particles are of negligible mass
E. The particles collide with each other

Question 13:

• JAMB 1980

Which of the following statements is true?

A. Metals conduct electricity while non-metals do not
B. Metals have high density, non-metals have low density
C. Metals form basic oxides, non-metals form acidic oxides
D. In the electro chemical series, metals are above hydrogen while non-metals are below hydrogen
E. Metals lose elections while non-metals gain electron during normal reactions

Question 14:

• JAMB 1980

The boiling point of water is higher than that of methanol because?

A. Water is oxide while methanol is an alcohol
B. Inter molecular forces in water are stronger than those in methanol
C. Water is an inorganic compound while methanol is organic
D. Water is an ionic compound while methanol is a covalent compound
E. Water is more reactive than methanol

Question 15:

• JAMB 1980

Chlorine, bromine and iodine resemble each other in that all?

A. Dissolve in alkalis
B. React violently with hydrogen without heating
C. Displace each other from solutions of their salts
D. Are gases
E. Are liquids