Classify the following as chemical or physical changes:- Boiling of water to form steam - Science

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Classify the following as chemical or physical changes:- Boiling of water to form steam

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Solution

Boiling of water to form steam → Physical change

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Chapter 2: Is Matter around us Pure - Intext Questions [Page 24]

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NCERT Science Class 9
Chapter 2 Is Matter around us Pure
Intext Questions | Q 1.4 | Page 24

RELATED QUESTIONS

Classify the following as chemical or physical changes:-Burning of paper and wood


Try segregating the things around you as pure substances or mixtures.


Which of the following are chemical changes?

(a) Growth of a plant

(b) Rusting of iron

(c) Mixing of iron fillings and sand

(d) Cooking of food

(e) Digestion of food

(f) Freezing of water

(g) Burning of candle


Classify the changes involved in the following processes as physical or chemical changes:

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Dissolving sugar in water

Burning of coal

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Changes in which only _____ __ properties of a substance change are called physical changes.


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A natural change can also be a desirable change


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burning of sugar — 


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Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
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Classify the following as physical or chemical changes :

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  2. Boiling of water
  3. Cutting of trees
  4. D0issolving salt in water
  5. Digestion of food
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Which of the following are physical changes and which are chemical changes ?

Freezing of water


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Drying of wet clothes


Classify the following as a physical or a chemical change.

Boiling of water


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Given reason:

Freezing of water to ice and evaporation of water are physical changes.


Given reason:

Cutting of a cloth piece is a physical change, though it cannot be reversed.


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Physical change and chemical change


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A physical change in a substance.


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A chemical change in a substance.


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It was nearing six o'clock in the evening. The sun was setting. A breeze was blowing. Leaves on the tree were shaking. Sahil was sitting in the courtyard, rolling balls of wet soil, and shaping them into various toys. Then he felt hungry and went into the house. Mother made a dough from wheat flour and fried purees. While eating hot purees, his attention was drawn outside the window. It had started raining. There was lightning, too. Sahil was enjoying his dinner in the dim light.


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The term involved in the change of state from – ‘water to ice’ – which is a physical change.


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Name the following.

A form of energy required for a chemical change.


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3. Evaporation Change of state from solid to liquid Collecting flowers
4. Freezing Change of state from gas to liquid Ice cube to water
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6. Non-periodic change Occurs at regular time intervals Steam to water drops

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______ is the Universal Solvent.


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Metallic sodium is soft enough to be cut with a knife.


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