Compound Test

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Compound Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is the basis of separation of substances used in the process of sieving?

A
Weight of particles

B
Size of particles

C
Density of particles

D
Quality of particles

E
Solubility of particles

Solution

Size is the basis of separation of substances used in the process of sieving. In this process, the smaller components of the mixture can pass through the pores of the sieve whereas bigger components of the mixture are retained by the sieve.
Question 2
1 / -0

Teacher wrote the following definitions on the black board for the students of grade VI. There is an error in one of the definitions. Tick the option which you think has an error

A
Separation of substances by hand is called handpicking.

B
Winnowing is the process of separation of substances using wind as a factor.

C
Sedimentation is the process of separating substances based on the weight of the substances mixed.

D
Decantation is the process of separating substances by tilting the liquid into another container.

E
Threshing is the process of separating roots from stalks by beating them on a hard surface.

Solution

This option is incorrect, the correct option is threshing is the process of separating stalks from stalks by beating them on a hard surface.
Question 3
1 / -0

Jaiveer saw a lady with metallic structure which she used to scroll on road. One day he saw her separating a few substances stuck on to it. Which property you think is she using to sort metal objects from all the objects on the road?

A
Electrical conductivity

B
weight of substances

C
magnetic properties

D
quality of substances

E
size of substances

Solution

This option is correct, magnetic properties are possessed by some metallic substances like iron, due which the metallic substances get attracted towards magnet.
Question 4
1 / -0

Which of the following methods would you use to separate sand from water?

A
Sedimentation and decantation

B
Seiving

C
Threshing

D
Winnowing

E
Handpicking

Solution

This option is correct as this method can be used to separate sand from water. The process of separating insoluble substances like sand, which is heavier than liquid by allowing them to settle down on their own due to gravity is called sedimentation. Decantation follows sedimentation, in this process the clear upper liquid is poured out from the container without disturbing the sediment (sand).
Question 5
1 / -0

Rahul accidentally mixed oil and water. What should he do to separate the two?

A
Stir them and pass them through a sieve.

B
Stir them and pass them through a filter paper.

C
Wait for it to settle so that they separate out in layer.

D
stir them and decant off the upper liquid

E
none of the above

Solution

This option is correct as this method would lead to sedimentation and will separate the two layers which can later be separated
Question 6
1 / -0

Which of the following statements is correct?

A
After preparing tea, sieving is used before decantation.

B
Before preparing tea, sieving is used before decantation.

C
Before preparing tea, decantation is used before seiving.

D
After preparing tea, decantation is used before sieving.

E
None of the above

Solution

This statement is correct -after preparing tea, decantation is used before sieving.
Question 7
1 / -0

Unjumble the following words to form a word which is an important natural factor for winnowing from the options given below

A
rperseru

B
dwin

C
temperuaret

D
ainr

E
mihiuytd

Solution

This option is correct as wind is important for winnowing.
Question 8
1 / -0

Name the process by which mud settles at the bottom of the water tanks. Choose the correct option from the ones given below

A
Sieving

B
Threshing

C
Decantation

D
Filtration

E
Sedimentation

Solution

Due to sedimentation, mud had collected at the bottom of the tank.
Question 9
1 / -0

By which of the following methods, butter is seperated from milk?

A
Churning

B
Handpicking

C
Threshing

D
Sieving

E
None of the above

Solution

This is correct, this method is used to separate butter from milk.
Question 10
1 / -0

Which of the following criteria can be used to separate salt and sand? Choose from the options given below

A
Density

B
Evaporation

C
Filtration

D
Sieving

E
Stirring

Solution

Evaporation can be used to separate substances in case one is soluble and the other is insoluble in water, sand and salt can be separated by evaporation.

Question 11

1 / -0

Match the following:

Column (I) - Method of separation	Column (II) - Type of particals
1. Evaporation	i. Separation of stalk and grains
2. Threshing	ii. Separation of mud and water from muddy water
3. Filtration	iii. Separation of sand and stones
4. Handpicking	iv. Extracting salt from sea water

Choose the correct options from below which correctly match the two columns:

1 - iv, 2 - i, 3 - iii, 4 - ii

1 - i, 2 - iv, 3 - ii, 4 - iii

1 - iv, 2 - i, 3 - ii, 4 - iii

1 - i, 2 - ii, 3 - iv, 4 - iii

1 - i, 2 - ii, 3 - iii, 4 - iv

Solution

This option is correct, as the columns are correctly matched.

Column (I) - Method of separation	Column (II) - Type of particals
1. Evaporation	iv. Extracting salt from sea water ( due difference in solubility)
2. Threshing	i. Separation of stalk and grains (due to small size of grains)
3. Filtration	ii. Separation of mud and water from muddy water (due to Sedimentation)
4. Handpicking	iii. Separation of sand and stones (due large size difference)

Question 12
1 / -0

Choose the correct statement from the options given below

A
In filtration of flour, fine flour particles pass through the hole of the sieve while the bigger particles remain on the sieve.

B
In filtration of flour, bigger flour particles pass through the hole of the sieve while the fine particles remain on the sieve.

C
In sieving of flour, bigger flour particles pass through the hole of the sieve while the fine particles remain on the sieve.

D
In sieving of flour, fine flour particles pass through the hole of the sieve while the bigger particles remain on the sieve.

E
None of the above

Solution

This option is correct,in sieving of flour, fine flour particles pass through the hole of the sieve while the bigger particles remain on the sieve
Question 13
1 / -0

Which of the following factors is of great importance used during winnowing?

A
Difference of weight of particles

B
Difference of quality of particles

C
Difference in magnetic properties of particles

D
Difference in density of particles

E
None of the above

Solution

Winnowing uses difference of weight of particles as factor to separate substances.
Question 14
1 / -0

What is the use of husk separated from grains after winnowing?

A
It is used as manure.

B
It is used as fodder.

C
It is used as food by the farmer's family.

D
It is used as cooking material.

E
None of the above

Solution

This option is correct, it is used as fodder for its nutritional value.
Question 15
1 / -0

Name the two crops which are used for the process of threshing during separation of substances. Choose the correct option from below to answer the question

A
Wheat and cotton

B
Cotton and paddy

C
Wheat and paddy

D
Wheat and jute

E
None of the above

Solution

This option is correct as wheat and paddy are used for threshing process.

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Compound Test - 4

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Compound Test - 4

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Question 1

Weight of particles

Size of particles

Density of particles

Quality of particles

Solubility of particles

Solution

Question 2

Separation of substances by hand is called handpicking.

Winnowing is the process of separation of substances using wind as a factor.

Sedimentation is the process of separating substances based on the weight of the substances mixed.

Decantation is the process of separating substances by tilting the liquid into another container.

Threshing is the process of separating roots from stalks by beating them on a hard surface.

Solution

Question 3

Electrical conductivity

weight of substances

magnetic properties

quality of substances

size of substances

Solution

Question 4

Sedimentation and decantation

Seiving

Threshing

Winnowing

Handpicking

Solution

Question 5

Stir them and pass them through a sieve.

Stir them and pass them through a filter paper.

Wait for it to settle so that they separate out in layer.

stir them and decant off the upper liquid

none of the above

Solution

Question 6

After preparing tea, sieving is used before decantation.

Before preparing tea, sieving is used before decantation.

Before preparing tea, decantation is used before seiving.

After preparing tea, decantation is used before sieving.

None of the above

Solution

Question 7

rperseru

dwin

temperuaret

ainr

mihiuytd

Solution

Question 8

Sieving

Threshing

Decantation

Filtration

Sedimentation

Solution

Question 9

Churning

Handpicking

Threshing

Sieving

None of the above

Solution

Question 10

Density

Evaporation

Filtration

Sieving

Stirring

Solution

Question 11

1 - iv, 2 - i, 3 - iii, 4 - ii