Advertisements
Advertisements
प्रश्न
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
पर्याय
physical
chemical
Advertisements
उत्तर
A change in which matter undergoes a change but the total mass of the substance is unaltered is a physical change.
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
How do you say that the process of digestion is a chemical change ?
State whether the following is physical or chemical changes.
cutting wood into small pieces —
Fill in the blank
Changes that occur in nature are called ______
Write true or false
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Classify the following as a physical or a chemical change.
Boiling of water
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 – Nature of change is temporary and reversible or permanent and irreversible.
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Water is the universal solvent. Why?
