JAMB Chemistry Past Questions & Answers - Page 297

1,481.

Which of the following equilibria shows little or no net reaction when the volume of the system is decreased?

A.

H2(g) + I2(g) ≈ 2HI(g)

B.

2NO2(g) ≈ N2O4(g)O4(g)N2O4(g)

C.

PCI5(g) ≈ PCI3(g) + CI2(g)

D.

ZnO(s) + CO2(g) ≈ ZnCO3(g)

Correct answer is D

No explanation has been provided for this answer.

1,482.

In what way is equilibrium constant for the forward reaction related to that of the reversed reaction?

A.

The additional of the two is expected to be one

B.

The product of the two is expected to be one

C.

The two equilibrium constants are identical

D.

The product of the two is always greater than one

Correct answer is A

No explanation has been provided for this answer.

1,483.

In which of the following is the entropy change positive?

A.

H2O(I) → H2O(g)

B.

Cu2+(aq) + Fe(s) → Fe(2+) + Cu(s)

C.

N2(g) + 3H2(g) → 2NH3(g)

D.

2HCI(s) → H2(g) + CI2(g)

Correct answer is A

No explanation has been provided for this answer.

1,485.

S2O2-3 + I2 → S2O62- + 2I-. In reaction above, the oxidizing agent is?

A.

S2O32-

B.

I2

C.

S4O62-

D.

I-

Correct answer is B

No explanation has been provided for this answer.