BUK Chemistry 2016/2017 Past Questions

Practice each question, then open it to see the full details.

In the electrolysis of brine, the anode is

A.Zinc
B. Platinum
C. Carbon
D. Copper

In the endothermic reaction N₂O_4(g) ⇋ 2NO_2(g) more product formation will be favoured by

A.A decrease in pressure
B. A decrease in volume
C. A constant volume
D.An increase in pressure

The oxidation state of chlorine in HClO is

A.-1
B. -5
C. +7
D. +1

Which of the following hydrogen halides has the highest entropy value

A.HBr
B. HF
C. HI
D. HCl

When a substance disappears completely as a gas on heating, the substance is said to have undergone

A.Sublimation
B. Crystallization
C. Distillation
D. Evaporation

Vulcanization involves the removal of

A.The single bond
B. The double bond
C. A polymer
D. A monomer

What volume of gas is evolved at s.t.p. If 2g of calcium trioxocarbonate(iv) is mixed with 2g of calcium trioxocarbonate(iv) acid

A.224cm³
B. 112cm³
C. 2240cm³
D. 448cm³

The IUPAC nomenclature of the compound below is
$\table , , H, , CH_3, , , , , ,; , , ∣, , ∣, , , ,, ,; H_2C, -, C, -, C, -, CH_2, -, CH_2, -, CH_3; , , ∣, , ∣, , , ,, ,;, , CH_3, , H, , , , , ,;$

A.3,4-dimethylhexane
B. 2,3-dimethylhexane
C. 2-ethylhexane
D. 2-ethylpentane

The property of chlorine which causes hydrogen chloride to be more ionic than the chlorine molecule is its

A.Electro negativity
B. Electro positivity
C. Electro affinity
D. Electro valency

The allotrope of carbon used in the decolourization of sugar is

A.Soot
B. Lampblack
C. Graphite
D. Charcoal