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Chem-HALF YEAR EXAM REVISION-2020

Total questions: 51

Worksheet time: 26mins

Name
Class
Date
1.

Cellulose is made up of large number of _______ units.

a)

sucrose

b)

glucose

c)

amino acids

d)

dacron

2.

Mention the type of polymer.

a)

linear

b)

natural

c)

cross linked

d)

synthetic

3.

The synthetic fibre best suited to make this is ______ and is due to its _____property.

a)

Polyester, Elasticity

b)

Nylon,Elasticity

c)

Polyester, High tensile strength

d)

Nylon, High tensile strength

4.

Which of the following plastics objects can be recycled?

i). Electric socket ii). Polythene bag iii).PVC pipe iv). Ashtray

a)

A and B

b)

B and C

c)

A and D

d)

C and D

5.

Synthetic fibres are made from raw materials called (a)  

6.

Which of the following is a thermosetting plastic?

a)

Formica

b)

Polyester

c)

PVC

d)

Thermocol

7.

Out of the following materials ::

a. Which materials are polyesters? b. Which material is a polyamide?

a)

cotton, nylon

b)

terylene, wool

c)

cotton,wool

d)

terylene, nylon

8.
Which is the correct statement about nylon?
a)
It is a natural fibre
b)
It is obtained from cellulose
c)
It is a strong fibre
d)
it is a mixture of polyester and cotton
9.
Jute is
a)
a man made fibre
b)
an animal fibre
c)
it melts on heating
d)
it is a plant fibre
10.
Tick the wrong statement about cotton
a)
a plant fiber
b)
it is a form of polymer called cellulose
c)
it is wrinkle free
d)
it absorbs sweat
11.
Tick the correct option about PET bottles
a)
Its full form is poly-ethylene terephthalate
b)
It is bio degradable
c)
it  corrodes easily
d)
All of the above options
12.
Tick the correct option :
Acrylic fiber is
a)
is man made fiber
b)
it is soft and light weight
c)
it is artificial wool
d)
All of the above
13.
Nylon is not used for making
a)
ropes for climbing
b)
blankets
c)
parachutes
d)
seat belts in cars
14.
synthetic fiber made from coal, water and air is
a)
rayon
b)
nylon
c)
acrylic
d)
polyester
15.
Bakelite is an example of
a)
thermosetting plastic
b)
thermoplastic
c)
synthetic fiber
d)
none of the above
16.
Electrical switches are made up of
a)
melamine
b)
bakelite
c)
PVC
d)
polythene
17.
which of the following is the source of rayon?
a)
wool
b)
PET
c)
wood pulp 
d)
silk
18.
polycot is obtained by mixing
a)
nylon and wool
b)
polyester and wool
c)
nylon and cotton
d)
polyester and cotton
19.
which is a thermosetting plastic?
a)
melamine
b)
polythene
c)
PVC
d)
nylon
20.
the material similar to silk in appearance is
a)
nylon
b)
rayon
c)
polyester
d)
terylene
21.
the most suitable material used for the preparation of handles of cooking utensils is
a)
polythene 
b)
PVC
c)
nylon
d)
bakelite
22.
which of the following groups contain all synthetic substances
a)
nylon.terylene,wool
b)
cotton,polycot,rayon
c)
pvc,polythene,bakelite
d)
acrylic silk wool
23.
the material which is commonly used for making kitchen containers is
a)
PVC
b)
acrylic
c)
teflon
d)
PET
24.

Name the plastic used for making water pipes

a)

Polythene

b)

PVC

c)

Acrylic

d)

Bakelite

25.

Select 2 polyester fibres

a)

Polythene

b)

PET

c)

Terylene

d)

Melamine

26.

Name the plastic used for non - stick coating

(a)  

27.

Many small unit combine together to form a large unit called (a)  

28.

Cooking pans have plastic handles because

a)

They are light, durable and strong

b)

They are non- reactive

c)

They are poor conductors of heat and electricity

d)

They do not catch fire

29.

Poly + Cot = ______

a)

Polycotton

b)

Polcot

c)

Polycot

d)

Terrycot

30.

Special cookwares are used in microwave ovens for cooking because

a)

They have non - stick coating

b)

The heat cooks the food but does not affect the plastic vessel

c)

They are fire resistant

31.

The plastics which gets deformed easily on heating and can be bent easily is called (a)  

32.

1. Identify the product based on the given features.

I. It is a man-made product.

II. It has a linear arrangement of monomer units.

III. It is used for making goods like toys, combs, containers, etc.

a)

Lycra

b)

Rayon

c)

Thermosets

d)

Thermoplastics

33.

_________ is the first fully synthetic fibre.

a)

Acrylic

b)

Polyester

c)

Nylon

d)

Rayon

34.

Paheli Is Taking Preparation For Her Final Examination. She Is Writing Some Statements About “Nylon” But She Confused To Know Whether The Statements Are Correct Or Not? Would You Help Her?

a)

Nylon is the first fully synthetic fibre.

b)

Nylon is made up of the repeating units of amide chemical.

c)

Nylon is a thermosetting polymer.

d)

Nylon fibres absorb very little water.

35.

Firefighters’ uniform is coated with a plastic that is fire resistant. Identify the plastic from the given options.

a)

Teflon

b)

Melamine

c)

PET

d)

Polyester

36.

Identify the type of plastic that can best be used to make electrical switches.

a)

PVC

b)

Polythene

c)

PET

d)

Bakelite

37.

Modern non-stick cookware and the flat end of an electric iron has a coating of a polymer. Identify the name of the polymer.

a)

PVC

b)

Rayon

c)

Teflon

d)

Polyester

38.

Nylon was made in _____.

a)

1930

b)

1932

c)

1931

d)

1934

e)

1937

39.

Steel is an example of an

a)

Metal

b)

Non-Metal

c)

Alloy

40.

Where would you find a list of all of the Metals and Non-metals that scientists have discovered?

(a)  

41.
Which of these is a property of metals?
a)
It's malleable
b)
It can't conduct electricity
c)
They are used in food
d)
It's very brittle
42.
Which type of elements are used in computer chips, lasers, and transistors?
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Metals and Metalloids
43.
When an object changes shape when struck by a hammer.
a)
luster
b)
malleable
c)
brittleness
d)
ductile
44.

The property of metals by which it can be drawn into wires is

a)

Malleability

b)

Sonority

c)

Lustrous

d)

Ductility

45.

Metals are

a)

Hard

b)

Lustrous

c)

Sonorous

d)

Non ductile

46.

Sodium is very reactive metal because it reacts vigorously with oxygen and water and

a)

Generate heat

b)

Catches fire

c)

Stored in kerosene

d)

All of the above

47.

Name the metal which is in liquid state.

a)

Iron

b)

Mercury

c)

Zinc

d)

Aluminium

48.
The approximate number of elements we know about today is .......
a)
18
b)
48
c)
118
d)
1018
49.
The list which contains only metals is .......
a)
aluminium, copper, nitrogen
b)
iron, oxygen, hydrogen
c)
iron, silver, aluminium
d)
iron, sulphur, copper
50.
zinc + hydrochloric acid ---->
a)
zinc chloride
b)
zinc chloride + hydrogen
c)
zinc chloride + oxygen
d)
zinc chlorine + hydrogen
51.

Which of the following are all examples of METALS?

a)

glass, gold, copper, silver

b)

copper, gold, bronze, plastic

c)

wood, iron, aluminium, steel

d)

copper, silver, iron, gold

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