Question 596:

• JAMB 1989

Which of the following represents the balanced equation for the reaction of copper with concentrated trioxonitrate (V) acid?

A. Cu _(s) + 2HNO _3(aq) → Cu (NO ₃) _2(aq) + H _2(g)
B. Cu _(s) + 4HNO _3(aq) → Cu (NO ₃) _2(aq) + 2H ₂O ₍₁₎ + 2NO _2(g)
C. 3Cu _(s) + 8HNO_3(aq) → 3Cu (NO₃)_2(aq) + 4H₂O₍₁₎ + 2NO_(g)
D. 3Cu_(s) + 4HNO_3(aq) → 3Cu(NO ₃) _2(aq) + 2H ₂O ₍₁₎ + 2NO _(g)

Question 597:

• JAMB 1989

The catalyst used in the contact process for the manufacture of tetraoxosulphate (VI) acid is

A. Manganes (IV) oxide
B. Manganese (ll) tetraoxosulphate (VI)
C. Vanadium (V) oxide
D. Iron metal

Question 598:

• JAMB 1989

Some products of destructive distillation of coal are

A. Carbon (IV) oxide and ethanoic acid
B. Trioxocarbonate (IV) acid and methanoic acid
C. Producer gas and water gas
D. Coke and ammonia liquor

Question 599:

• JAMB 1989

Gunpower is made from charcoal, sulphur and potassium trioxonitrate (V) The salt in the mixture performs the function of

A. An oxidant
B. A reductant
C. A solvent
D. A catalyst

Question 600:

• JAMB 1989

Which of the following reactions is (are) feasible?
I Br ₍₁₎ + 2CI _2(aq) 2Br _(aq) + CI _2(g)
ll 21 _(aq) + Br ₂₍₁₎ 2Br _(aq) + 1 _2(s)
lll 2F _(aq) + CI _2(g) 2CI _(aq) + F _2(g) IV 2F _(aq) + Br ₂₍₁₎ 2Br _(aq) + F _2(g)

A. L
B. Ll
C. L and lll
D. Lll and lV