Jamb Chemistry Past Questions and Answers

Question 331:

• JAMB 1983

Which of these metals, Mg, Fe, Pb and Cu will dissolve in dilute HCI?

A. All the metals
B. Mg ,Fe and Cu
C. Mg, Fe and Pb
D. Mg and Fe only
E. Mg only

Question 332:

• JAMB 1983

Stainless steel is an alloy of

A. Carbon, iron and lead
B. Carbon, iron and chromium
C. Carbon, iron and copper
D. Carbon, iron and silver
E. Carbon and iron only

Question 333:

• JAMB 1983

Which volume of 0.5 M H ₂SO₄ will exactly neutralize 20 cm ³ of 0.1 M NaOH solution?

A. 2.0 cm ³
B. 5.0 cm ³
C. 6.8 cm ³
D. 8.3 cm ³
E. 10.4 cm ³

Question 334:

• JAMB 1983

Which of the following pair of gases will NOT react further with oxygen at a temperature between 30^oC AND 400^oC

A. SO₂ and NH₃
B. CO₂ and H₂
C. NO₂ and SO₃
D. SO₃ and NO
E. CO and H₂

Question 335:

• JAMB 1983

Some metals are extracted from their ores after some preliminary treatments by electrolysis (L), some of both processes (TL). Which set-up in the following for the extraction of ion, copper and aluminium is correct?

A. Lron (L), copper (L) aluminium (T)
B. Lron (T) copper (L) aluminium (T)
C. Lron (TL) copper (TL) aluminium (TL)
D. Iron (L) copper (T) aluminium (T)
E. Lron (T) copper (L), aluminium (TL)