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Separation of Substances - Grade 6 ANNUAL EXAMS

Total questions: 40

Worksheet time: 26mins

Name
Class
Date
1.

How are grain seeds removed from their stalks?

a)

Sieving

b)

Winnowing

c)

Threshing

d)

All of the above

2.

What is a mixture?

a)

A chemical combination of two or more different substances.

b)

A physical combination of two or more different substances.

c)

A chemically pure substance.

d)

A special type of solution

3.

Lemonade is a special mixture called a

a)

substance

b)

solution

c)

plasma

d)

ingredient

4.

A fruit salad is a

a)

solution

b)

mixture

5.

Which of the following is essential to perform winnowing activity?

a)

Wind

b)

Water

c)

Magnet

d)

Filter paper

6.

While preparing chapatis, Nitya found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

a)

Threshing

b)

Sieving

c)

Winnowing

d)

Filtration

7.

Hand picking method is effective in

a)

solid mixture

b)

Liquid mixture

c)

Gaseous mixture

d)

None of these

8.

The process of settling down of particles of a solid in a liquid is

a)

Sublimation

b)

Sedimentation

c)

Filtration

d)

Decantation

9.

The process of changing solid to gas directly is ______

a)

Evaporation

b)

Condensation

c)

Melting

d)

Sublimation

10.

The solubility ____________ with increase in temperature.

a)

doesn't change

b)

decreases

c)

increases

11.

Salt is obtained from sea water by __________

a)

Sublimation

b)

Filtration

c)

Evaporation

d)

Hand picking

12.

Name the given process.

a)

Sublimation

b)

Threshing

c)

Distillation

d)

Magnetic separation

13.
The diagram shows the apparatus for separating soil and water. What are the labelled parts?
a)
A = distillate, B = filtrate
b)
A = filtrate, B = residue
c)
A = residue, B = filtrate
d)
A = residue, B = distillate
14.
Filtration can be used to separate...
a)
an insoluble solid from a solution
b)
a soluble solid from a solution
c)
a dissolved solid from a solution
15.

What separation technique does the picture show?

a)

Sieving

b)

filtering

c)

magnetic separation

d)

Distillation

16.

Sawdust is not soluble in water. If, accidentally some particles of sawdust drop into a glass of water. How would you separate them from water?

a)

Decanting

b)

Filtering

c)

Sieving

d)

Distillation

17.
Which technique is shown the diagram below
a)
seiving
b)
filtration
c)
decanting
d)
crystallization
18.
Which one of the following is the name for separation technique in the picture below
a)
distillation
b)
dissolving
c)
evaporation
d)
decanting
19.
The drops of water that appear on the outside of a glass of cold water on a warm day are an example of?
a)
sublimation
b)
condensation
c)
evaporation
20.

What is the purpose of Filtration?

a)

Separating and insoluble solid from a liquid

b)

Separation of a mixture of 2 solids

c)

Separates heavier substances from a suspension

21.
Statement A: A mixture of cement and pebbles can be separated by using the sieve with small pores Statement B: A sieve with small pores will allow only small cement particles to pass through and will hold back the pebbles
a)
a. Statement A is true only
b)
b. Statement B is true only
c)
c. Both are false
d)
d. Both are true
22.

A material that allows liquids to pass through it, while very small solids remain behind as residue

a)

Filter

b)

Sieve

c)

Funnel

d)

Spoon

23.
Chocolate milk is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
24.
Soil is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
25.

A student collects seashells at the beach when they werre on a picnic. Teacher will not allow the student to take any sand on the bus. If the student wishes to take the seashells home he must separate the seashells from the sand. Which of the following would be most helpful when trying to separate the sand from the sea shells?

a)

hot plate

b)

water

c)

sieve

d)

magnet

26.

A group of students in Eco club collected empty cans for recycling. They have several large bins with aluminum and steel cans, all mixed together. The two types of cans must be separated. Which of the following techniques could the students use to separate the two types of cans?

a)

Place the cans in water, and the aluminum cans will float

b)

Crush the cans to make them easier to carry

c)

Test the cans for their ability to conduct electricity

d)

Use a magnet to find and remove the steel cans

27.

A solution in which no more solute can be added is called

a)

Saturated solution

b)

Unsaturated solution

c)

True Solution

d)

Mixture

28.

Rain water is kind of

a)

Saline water

b)

Distilled water

c)

Carbonated water

d)

Sieving

29.

Butter is separated by curd

a)

Filtration

b)

churning

c)

heating

d)

sieving

30.

Separation of kerosene oil from water is done by

a)

Decantation

b)

Filtration

c)

Condensation

d)

Crystallisation

31.

The method that is used to obtain pure salt from impure salt is

a)

Decantation

b)

Crystallisation

c)

Evaporation

d)

Condensation

32.

When milk, cooled after boiling, is poured onto a piece of cloth the cream (malai) is left behind on it. This process of separating cream from milk is an

example of (a)   .

33.

Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called (a)   .

34.

A mixture of milk and water can be separated by filtration.

a)

TRUE

b)

FALSE

35.

Choose the incorrect statement from the following:

a)

Separation helps in removing impurities

b)

Separation leads to complexities

c)

Separation of grain from stalk can be done only manually

d)

Sand will get dissolved in water

36.

Choose a method of separation for the mixture bought by Aryan

a)

Sieving

b)

Handpicking

c)

Threshing

d)

Filtration

37.

Ramaira wants to make low fat Lassi, which method shall she use for separating the fat?

a)

Filtration

b)

Sedimentation

c)

Decantation

d)

Churning

38.

Choose the mixtures which cannot be separated by filtration

a)

Cornflakes in milk

b)

Sugar in Milk

c)

Chocolate syrup in milk

d)

Tea leaves from water

39.

Property which forms the basis of sieving

a)

Difference in colour

b)

Difference in weight

c)

Difference in shape

d)

Difference in Size

40.

Identify the separation technique

a)

Threshing

b)

Winnowing

c)

Sieving

d)

Handpicking

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