Jamb Chemistry 1992 Past Questions and Answers

Question 1:

• JAMB 1992

There is a large temperature interval between the melting point and the boiling point of a metal because?

A. Metals have very high melting points
B. Metals conduct heat very repaidly
C. Melting does not break the metalic bond but boiling does
D. The crystal lattice of metals is easily broken

Question 2:

• JAMB 1992

There is a large temperature interval between the melting point and the boiling point of a metal because?

A. Metals have very high melting points
B. Metals conduct heat very repaidly
C. Melting does not break the metalic bond but boiling does
D. The crystal lattice of metals is easily broken

Question 3:

• JAMB 1992

How many moles of (H+) are there in 1 dm³ of 0.5 M solution of H₂SO₄?

A. 2.0 moles
B. 1.0 moles
C. 0.5 mole
D. 0.25 mole

Question 4:

• JAMB 1992

wH₂SO₄ + xAI(OH)₃ → yH₂O + = zAI₂(SO₄)₃. The respective values of w.x.y and z in the equation above are?

A. 2,2,5 and 1
B. 3,2,5 and 2
C. 3,2,6 and 1
D. 2,2,6 and 2

Question 5:

• JAMB 1992

A given mass of gas occupies 2 dm³ at 300k. At what temperature will its volume be doubled keeping the pressure constant?

A. 400 k
B. 480 k
C. 550 k
D. 600 k