UNIZIK Chemistry 2009/2010 Day 1 Past Questions

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

Question 1

An acid present in proteins is

A.lactic acid
B.amino acid
C.palmitic acid
D.stearic acid

Objective

Question 2

The following are uses of sulphur except

A.manufacture of tetraoxosulphate (vi) acid
B.prevention of the growth of fungi
C.vulcanization of rubber
D.coating of steel to prevent rusting

Objective

Question 3

A salt which loses mass when exposed to air is

A.hygroscopic
B.deliquescent
C.efflorescent
D.effervescent

Objective

Question 4

Detergents are better than soaps for laundry because

A.detergents are synthetic while soaps are not
B.detergents are more soluble in water than soaps
C.scum is precipitated when soaps are used with hard water but not with detergents
D.soaps form soluble salts with ions causing hardness of water while detergents do not.

Objective

Question 5

Which of the following compounds is aromatic?

A.Benzene
B.Cyclobutane
C.Hexane
D.Ethane

Objective

Question 6

Which of the following substances is used as an anesthetic?

A.CHI₃
B.CHCI₃
C.CHBr₃
D.C₂H₅OH

Objective

Question 7

Which of the following is a neutral oxide

A.Nitrogen (vi) oxide
B.carbon (iv) oxide
C.sulphur (vi) oxide
D.nitrous oxide

Objective

Question 8

Which of the following statements is not correct?

A.carbon exhibits allotropy
B.sulphur exhibits allotropy
C.chlorine exhibits allotropy
D.argon is a noble gas

Objective

Question 9

The following are heavy chemicals except

A.tetraoxosulphate (VI) acid
B.caustic soda
C.dyes
D.sodium trioxocarbonate (iv)

Objective

Question 10

Which of the following is not true of the rusting of iron?

A.Rusting is a reduction process
B.Rusting of iron takes place in the presence of oxygen and moisture
C.the rust formed is reddish brown
D.the major constituent of rust is hydrated iron (iii) oxide.

Objective

Question 11

The most suitable method to use when separating an insoluble solid from a liquid is:

A.evaporation
B.filtration
C.magnetization
D.distillation

Objective

Question 12

When an element can exists in two or more forms in the same physical state, the element is said to exhibit:

A.isotropy
B.isomerism
C.allotropy
D.hygroscopy

Objective

Question 13

Which of the following carbohydrates does not usually occur in the crystalline form?

A.fructose
B.glucose
C.cellulose
D.maltose

Objective

Question 14

Copper can best be purified by

A.roasting the impure copper in a blast furnace
B.heating the oxide with coke
C.electrolyzing a copper (ii) salt solution using the impure copper as the anode
D.washing the impure copper with sodium hydroxide solution

Objective

Question 15

A sample of orange juice is suspected to have been contaminated with a yellow dye. Which of the following methods can be used to detect the dye?

A.Decantation
B.Chromatography
C.Distillation
D.Evaporation

Objective