Science [1 Marks Each] QUE - ANS

Does the water dissolve equal amount of different soluble substances?

Fill in the blanks with appropriate words:
Small pieces of stone can be removed from rice by __________.

Fill in the blanks with appropriate words:
Husk from wheat flour is generally removed by ___________.

State whether the following statements are true or false.
A mixture of tea leaves and milk can be separated by decantation.

State whether the following statements are true or false.
A mixture of iron filings and rice flour can be separated by magnet.

Fill up the blank:
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 ___________.

Which type of impurities can be separated by hand picking?

When is handpicking used?

Define loading.

Which types of mixtures are separated by evaporation?

What is decantation?

Which substance is used for loading?

What do you mean by winnowing? Explain with example.

How can we separate salt from water?

Give one example of sieving used in everyday life.

Why does visibility increase after rain?

Differentiate between saturated and unsaturated solutions.

State whether the following statements are true or false.
Water can be separated from salt by evaporation.

Activity.Collect some muddy water from a pond or a river. If it is not available, mix some l soil to water in a glass. Let it stand for half an hour. Observe the water carefully ‘ and note your observations.
Does some soil settle at the bottom of water? Why? What will you call this j process?

How can sand be separated from water?

What happens when steam comes in contact with the metal plate cooled with ice?

What is a saturated solution?

If a salt is completely dissolved in water, is it possible to separate salt from water by filtration?

Name any two methods used for separation of substances.

Name the device by which cream can be separated from milk at home.

What is done in threshing? How it can be done?

Which method is used to separate stones from grains?

Name the method by which you can separate butter from milk.

Which method is used to separate heavier and lighter component of a mixture by wind or blowing air?

What is strainer?

During centrifugation, which particles settle down at the bottom?

What are the main reasons for separation of components of a mixture?

Why does visibility increase after rains?

True or false?
Separation of sugar from tea can be done with filtration.

Which method of separating tea leaves from prepared tea is better. filtration or decantation?

Fill up the blank:
The method of separating seeds of paddy from its stalks is called _______.

Define evaporation.

What is the effect of temperature on solubility?

Which method is used to separate tea leaves from tea?

Raghav is given a glass bottle with some white substances in it that is either chalk or sugar. How can he find out which of the two is sugar or chalk, without tasting it?

What is sedimentation?

How is a solution prepared?

Fill in the blanks with appropriate words:
Filtration is helpful in separating an insoluble __________ from a __________.

State whether the following statements are true or false.
A mixture of oil and water can be separated by filtration.

What is a solution?

Among the following which is the separation technique used to separate a solid-solid mixture.
Filtration, decantation, hand picking.

Name some materials that are used as filters.

State whether the following statements are true or false.
A mixture of wheat grains and wheat flour can be separated by sieving.

True or false?
Grain and husk can be separated with the process of decantation.