UNIZIK Chemistry 2010/2011 Day 2 Past Questions

Question 1

Glucose reduces fehling's solution on warming to

A.copper(I) oxide
B.copper (II) oxide
C.copper (I) chloride
D.copper (II) hydroxide

Objective

Question 2

Pig-iron is brittle because it contains

A.a high percentage of carbon as impurity
B.calcium trioxosulphate (VI) acid
C.lead (IV) tetraethyl
D.sodium hydroxide.

Objective

Question 3

Which of the following is normally used for drying ammonia gas?

A.Concentrated tetraoxosulphate (VI) acid
B.Calcium oxide
C.Anhydrous calcium chloride
D.Phosphorus (V) oxide

Objective

Question 4

The following metals are extracted by the electrolytic method except

A.potassium
B.calcium
C.tin
D.magnesium

Objective

Question 5

Nuclear reactions can be used in the following except

A.gauging the thickness of objects
B.making atomic bombs
C.curing cancer
D.purifying water

Objective

Question 6

To what temperature must a gas be raised from 273k in order to double both its volume and pressure?

A.298k
B.300k
C.546k
D.1092K

Objective

Question 7

Which of the following is not a direct petroleum product?

A.Ethanol
B.Petrol
C.Methane
D.Vaseline.

Objective

Question 8

Compounds that have the same molecular formula but different structures are said to be

A.allotropic
B.isomeric
C.isotropic
D.polymeric

Objective

Question 9

In which of the following crystals are the particles held by Van der Waal's force only?

A.sodium chloride
B.Ice
C.Diamond
D.Iodine.

Objective

Question 10

Hydrogen is used for the following except

A.manufacture of ammonia
B.synthesis of hydrochloric acid
C.extinguishing fire
D.manufacture of margarine

Objective

Question 11

Under high pressure, real gases do not obey gas laws because their molecules

A.have become manufacture of margarine. more energetic
B.have become less energetic
C.have becomes smaller in size
D.decompose into atoms

Objective

Question 12

Which of the following silver halides is readily soluble in ammonium hydroxide?

A.AgI
B.AgBr
C.AgCl
D.AgF.

Objective

Question 13

Hardening of an oil may be achieved by

A.boiling the oil with water
B.Boiling the oil with a catalyst
C.treating the oil with hydrogen and a catalyst
D.distilling the oil under reduced pressure

Objective

Question 14

Starch can be converted to ethyl alcohol by

A.distilling
B.fermentation
C.cracking
D.isomerization

Objective

Question 15

The oxidation state of manganese in potassium per rnanganate is

A.+ 5
B.+3
C.+7
D.+2

Objective

Question 16

Which of the following substances are all made by the process of polymerization?

A.Nylon and soap
B.Ethanoic acids , Margarine and ethanol
C.Nylon and artificial rubber
D.Nylon and margarine.

Objective

Question 17

Zinc oxide is a

A.basic oxide
B.acids oxide
C.amphoteric oxide
D.neutral oxide.

Objective

Question 18

When sodium chloride and metallic sodium are each dissolved in water

A.both processes are endothermic
B.both processes are exothermic
C.the dissolution of metallic sodium is exothermic
D.the dissolution of metallic sodium is endothermic.

Objective

Question 19

The oxidation state of chlorine in potassium chlorate is

A.+1
B.+2
C.+3
D.+5.

Objective

Question 20

The nucleus of an atom contains

A.protons only
B.neutrons only
C.protons and neutrons
D.neutrons and electrons.

Objective