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UTME Chemistry 2008 JAMB Past Questions and Answers, Jamb, Pre-degree, Nursing, Waec, Neco

UTME Chemistry 2008 JAMB Past Questions and Answers, Jamb, Pre-degree, Nursing, Waec, Neco

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UTME Chemistry 2008 JAMB Past Questions and Answers

1.    What is the IUPAC nomenclature of the compound NaCIO?

Options

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A) sodium oxochlorate (I)

B) sodium chloro (I) oxide             

C) sodium monooxochlorate (II)

D) sodium chloro (I) monoxide

The correct answer is A.

2.    In recharging a lead-acid accumulator, the reaction at the cathode can be represented as

Options

A) Pb2+(aq) + SO2-4(aq) →PbSO4(s)

B) Pb2+(aq) + 2e →Pb(s)

C) Pb2+(aq) + 2H2O(l) → PbO2(s) + 4H+(aq) + 4e

D) Pb(s) → Pb2+(aq) + 2e

The correct answer is D.

3.    If a given quantity of electricity liberates 0.65g of Zn2+, what amount of Hg2+ would be liberated by the same quantity of current?

[Zn = 65, Hg = 201]

Options

A) 1.00g

B) 2.10g

C) 4.02g

D) 8.04g

The correct answer is B.

NH3(g) + HCl(s) → NH4Cl(s)

4.    The entropy change in the system above is

Options

A) positive

B) zero

C) negative

D) indeterminate

The correct answer is C.

5.    Which of the following reaction is endothermic?

Options

A) C(s) + O2(g) → CO2(g)

B) CaO(s) + H2O(l) → Ca(OH)2(s)

C) C(s) + H2O(g) → CO(g) + H2(g)

D) HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

The correct answer is C.

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