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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
पर्याय
common salt
petrol
water
milk
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उत्तर
petrol
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संबंधित प्रश्न
Explain the following giving an example.
Pure substance
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
True or false
Change of seasons is a non-periodic change.
What is a physical change ? Give two examples of physical changes.
The rusting of an iron object is called :
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:
Which of the following is not a physical change?
