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Science Form 4 Chapter 9

Total questions: 50

Worksheet time: 50mins

Name
Class
Date
1.

The diagram 1 shows an experiment carried out to compare the formation of rust by

pure iron and an alloy iron.

Predict the correct observation after three days.

a)

Iron nail does not rust.

b)

Iron nail becomes more shiny.

c)

Steel nail does not rust.

d)

Steel nail becomes rusty.

2.

The properties of alloy P are listed above. Alloy P can be used to make

a)

cars

b)

trumpet

c)

bridges

d)

aeroplane

3.

Which diagram shows the structure of an alloyl?

a)
b)
c)
d)
4.

The main component in clay is

a)

aluminium silicate

b)

silica

c)

silicon dioxide

d)

lead oxide

5.

These apparatus are made from

a)

Lead crystal glass

b)

Soda-lima glass

c)

Fused silica glass

d)

Borosilicate glass

6.

Ceramic can be used to make these except

a)

bulb

b)

tableware

c)

tiles

d)

dentures

7.

The following information is about an alloy.

What is the alloy?

a)

Duralumin

b)

Superconductor alloy

c)

Pewter

d)

Steel

8.

Which of the following is NOT a characteristic of glass?

a)

Hard and brittle

b)

Transparent

c)

Porous

d)

Does not conduct heat and electricity

9.

Starch is made from monomers of

a)

cellulose

b)

glucose

c)

amino acids

d)

isoprene

10.

Polythene is made from monomers of

a)

ethene

b)

methyl methacrylate

c)

chloropylene

d)

plastic

11.

This diagram shows the process of

a)

polymerisation

b)

sublimation

c)

depolymerisation

d)

addition

12.

Which of the following is a natural polymer?

a)

Nylon

b)

Protein

c)

Glucose

d)

Amino acid

13.

Natural rubber is made up of many units of

a)

glucose

b)

neoprene

c)

isoprene

d)

methyl methacrylate

14.

‘Bronze is harder than copper’. Which of the following is the best to explain the statement?

a)

Atoms in bronze are arranged closely packed and less empty spaces.

b)

Layers of atoms in bronze are not easily slide over each other.

c)

Atomic size of copper and tin is different.

d)

Bronze is a mixture of copper and tin

15.

What is the composition of brass?

a)

30% tin and 70% copper

b)

10% tin and 90% copper

c)

30% zinc and 70% copper

d)

10% zinc and 90% copper

16.

Which of the following statements below is true?

a)

Copper is more ductile than brass

b)

Brass is more malleable than copper

c)

Iron is shinier than stainless steel

d)

Iron is more resistant to corrosion than steel

17.

Which of the following mixture forms a light and strong alloy to make the body of a speeding boat?

a)

iron and carbon

b)

Aluminium and copper

c)

Copper and nickel

d)

Tin and lead

18.

Alloying can harden the metals because

a)

the foreign atoms can prevent layers of atoms from sliding over each other

b)

the foreign atoms produce stronger attractive forces between the metal atoms

c)

the foreign atoms are stronger and harder

d)

the foreign atoms increase the energy of the metal atoms

19.

Which of the following characteristics belong to pure metals?

I. Ductile

II. Malleable

III. Brittle

IV. Good conductor of electricity

a)

I and II

b)

I and IV

c)

I, II and IV

d)

I, II, III and IV

20.

Which of the following properties does not belong to an alloy as compared to its pure metal?

a)

Stronger

b)

More corrosion resistant

c)

Harder

d)

More malleable

21.

Diagram above shows the arrangement of atoms in brass. Which of the following could be atoms X and Y?

a)

X : Copper Y: Tin

b)

X: Zinc Y: Copper

c)

X: Iron Y: Carbon

d)

X: Copper Y: Zinc

22.

Which of the following alloy is used to make the body of an aeroplane?

a)

Brass

b)

Duralumin

c)

Steel

d)

Pewter

23.

The main element present in brass and bronze is

a)

copper

b)

lead

c)

zinc

d)

tin

24.

Alloy is a ...

a)

A chemical compound with combination between metal and non-metal

b)

A salt contain of two or more elements where the main element is non-metal

c)

Mixture of two or more elements where the main element is metal

25.

Ceramic materials have high melting points.

a)

True

b)

False

26.

Most ceramic materials have good insulation properties.

a)

False

b)

True

27.
What is the main ingredient in glass?
a)
soda ash
b)
limestone
c)
borax
d)
silica
28.
Which type of glass has the highest melting point?
a)
soda lime glass
b)
borosilicate glass
c)
Pyrex glass 
d)
fused silica glass
29.
Which type of glass is most commonly used in cookware?
a)
soda lime glass
b)
borosilicate glass
c)
laminated glass
d)
fused silica glass
30.

2. Silica is a compound that contains silicon dioxide and exists naturally in _________________.

a)

clay

b)

sand

c)

air

31.

3. What are the properties of soda -lime glass?

a)

chemically inert

b)

easy to shape

c)

low melting point

32.

Which types of glass has high resistance to heat and chemicals compared to soda-lime glass?

a)

soda-lime glass

b)

lead crystal glass

c)

borosilicate glass

33.

8. The main component of clay is _________________.

a)

boron silicate

b)

aluminium silicate

c)

boron oxide

d)

lead oxide

34.

9. Bulb is made up of _______________.

a)

fused silica glass

b)

lead crystal glass

c)

soda-lime glass

35.

10. Laboratory apparatus are made up of _________________.

a)

lead crystal glass

b)

soda-lime glass

c)

borosilicate glass

36.

11. What are the examples of applications of ceramic?

a)

dentures

b)

glass prism

c)

bulb

d)

glass window

e)

tiles for flooring

37.

Large molecules made up of small monomers are called

a)

polymers

b)

peptides

c)

peptones

d)

monomers

38.

Monomers of ethene in thousand numbers react together in addition polymerization to produce

a)

polyamides

b)

polyesters

c)

poly(ethene)

d)

all of them

39.

Which of these is an example of synthetic polymer?

a)

cotton fibers

b)

rubber

c)

wool

d)

polyvinyl chloride (PVC)

40.

What is the name of the reaction used to make polymers?

a)

polymerization

b)

cracking

c)

polygonization

d)

precipitation

41.

Which polymers occur naturally?

a)

Starch and Nylon

b)

Starch and Cellulose

c)

Proteins and Nylon

d)

Proteins and PVC

42.

A rubber tapper finds that latex coagulates after several hours. What substance should be added into the latex to prevent it from coagulating?

a)

Formic acid

b)

Sodium chloride solution

c)

Ammonia solution

d)

Nitric acid

43.

Charles Goodyear (December 29, 1800 – July 1, 1860) was an American self-taught chemist and manufacturing engineer who developed vulcanized rubber.

Nowadays in industrial vulcanization, latex is heated or exposed to _______________ to produced vulcanized rubber.

a)

ammonia solution

b)

disulphur dichloride

c)

concentrated hyrdochloric acid

d)

methanoic acid

44.

The aircraft tyres are made from vulcanized rubber. What property of vulcanized rubber makes it suitable to be used for making these aircraft tyres?

a)

it resist to oxidation

b)

it is harder and stronger

c)

it can maintain their elasticity

d)

it can take the tremendous stress and strength

45.

Substance P turns white latex milk into yellow solid. What is substance P?

a)

Ammonia solution

b)

Ethanoic acid

c)

Potassium hydroxide solution

d)

Potassium chloride solution

46.

A lorry wants to transfer latex from a rubber estate to a rubber factory. Which substance can be added to the latex to prevent it from coagulating?

a)

Distilled water

b)

Tetrachloromethane

c)

Acetic acid

d)

Diluted sodium hydroxide solution

47.

Which of the following is the correct structure of vulcanised natural rubber?

a)
b)
c)
d)
48.

The protein membrane of natural rubber is surrounded by negative charge. What is the name of a process if the natural rubber is added with ethanoic acid?

a)

Vulcanisation

b)

Polymerisation

c)

Coagulation

d)

Hydrogenation

49.

What is vulcanization?

a)

A process whereby rubber is reacted with oxygen.

b)

A process whereby rubber is reacted with sulphur

c)

A process whereby rubber is reacted with methanoic acid

d)

A process whereby rubber is reacted with ammonia

50.

Fresh latex will coagulate if left overnight because

a)

Latex produce lactic acid

b)

Latex oxidised by oxygen in the air

c)

The bacteria in the air react on the protein membrane to produce lactic acid

d)

The bacteria in the air react on the protein membrane to produce alkaline solution

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