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प्रश्न
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
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उत्तर
Physical Change.
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संबंधित प्रश्न
Try segregating the things around you as pure substances or mixtures.
Fill in the blank.
A new substance is formed in a ............... change.
Two chemical substances X and Y combine together to form a product P which contains both X and Y X + Y P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning X, Y and P are correct ?
- P is a compound
- X and Y are compounds
- X and Y are elements
- P has a fixed composition
Given reason:
Burning of paper is a chemical change.
What will you take into account while identifying the following?
A physical change in a substance.
Read the paragraph and note down the various types of changes it mentions.
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.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Name the following.
A form of energy required for a chemical change.
