Advertisements
Advertisements
प्रश्न
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
विकल्प
Physical change
Chemical change
Advertisements
उत्तर
Glowing of electric bulb – Physical change
APPEARS IN
संबंधित प्रश्न
Match the columns
| column A | coulmn B |
| 1. A change which cannot be easily reversed | a. man-made change |
| 2.A change that repeats itself at regular intervals | b. chemical change |
| 3. A change that is made by humans | c. physical change |
|
4. A change in which the original substance cannot be obtained |
d. periodic change |
| 5. A change where no new substance is formade | e. irreversible change |
| f. slow change |
Photosynthesis cannot take place at night.
Classify the following changes as physical or chemical:- photosynthesis in plants
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
What type of energy changes is associated when ice melts?
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
Classify the following as physical or chemical properties
The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.
