Advertisements
Advertisements
प्रश्न
Try segregating the things around you as pure substances or mixtures.
Advertisements
उत्तर
- Pure substance: Distilled water, diamond; graphite, gold, sulphur.
- Mixture: Curd, ice cream, kerosene oil, cooking oil, steel, vulcanised rubber, solder wire (an alloy of lead and tin).
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
Fill in the blank.
When a candle burns, wax melts. Melting of wax is a ________ change.
State whether the following is physical or chemical changes.
mixing oil with water —
Tick the most appropriate answer.
Photosynthesis requires
Classify the following as a physical or a chemical change.
Burning of paper
Fill in the blank.
A change, which alters the composition of a substances, is known as a___________ change.
When ice melts to form water, change occurs in its
______ is the substance that is dissolved in a solvent.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
Grinding of wheat grain changes its size. It is a ____________ change.
