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प्रश्न
Fill in the blank
Revolution of the earth around the sun is a ________ change.
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उत्तर
Revolution of the earth around the sun is a natural periodic change.
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संबंधित प्रश्न
How do you say that the process of digestion is a chemical change ?
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.
glowing of a bulb -
State whether the following is physical or chemical changes.
water cycle in nature —
Write true or false
Burning of sugar is a temporary change.
Tick the most appropriate answer.
Physical changes are
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
