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प्रश्न
State whether the following is physical or chemical changes.
burning of sugar —
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उत्तर
chemical change,
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संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
Fill in the blank.
When a candle burns, wax melts. Melting of wax is a ________ change.
True or false
In a physical change no net energy change is involved.
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.
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
State whether the following statement is true or false. If false write the correct statement.
Melting of butter and wax are examples of chemical changes.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
When ice melts to form water, change occurs in its
Which of the following is a physical change?
The change of state of a substance from solid to liquid and liquid to gas is ______.
