EASY
Earn 100

Can all solids dissolve in water?

Important Questions on A River’s Tale

EASY
Fill in the blank using the right word:
We should drink _____ (clean/distilled) water.
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_____ is the substance that dissolves in a solvent.
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Daily human activities like bathing in the river does not cause pollution.
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The process of filtration is used to remove
EASY

Correct the following sentence by changing the underlined word.

Filtration and condensation are used to remove soluble impurities from water.

EASY

Write [G] for good habits and [B] for bad food habits.

We should not drink enough water. [ ]

MEDIUM
Describe how water can become polluted. What can we do to keep water clean?
MEDIUM

Distinguish between.

Soluble and Insoluble impurities.

EASY
Which of the following is not soluble in water?
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Chemicals like chlorine, bleaching powder or potassium permanganate are added to the water to make it 
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The process by which the water droplets melt in the clouds and fall on the ground is called _____.
MEDIUM
Write three ways to make water safe for drinking.
EASY

Fill in the blank with an appropriate word:

Water is used to put out _____ (fire/air).

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The solute and solvent together form a _____.
MEDIUM
Why do we need to filter or boil water before drinking?
EASY

Choose the right word and fill in the blank:

We should not throw waste in _____. (dustbin/water bodies)

EASY

Fill in the blank with an appropriate word:

Mixing of jelly crystals in water is _____ (illusion/solution/pollution).

EASY
Which of the following diseases is caused due to regular drinking of polluted water?