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प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Condensation of steam is not a chemical change.
विकल्प
True
False
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उत्तर
This statement is True.
Explanation:
Steam condensation is a physical change, as it involves a change of state from gas to liquid without altering the chemical composition.
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संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron and rust are the same substances.
What do you observe when Iron nail is kept in copper sulphate solution for sometime.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
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Distillation is a method of obtaining pure ............. from a solution.
When lithium metal is placed in hydrochloric acid, _______ gas is evolved.
______ change results in the change of the substance.
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
Match the following:
| Column I | Column II | ||
| 1. | Burning of coal | a. | Rusting |
| 2. | Painting of a surface | b. | Evaporation |
| 3. | Dipping iron in the water | c. | Chemical change |
| 4. | Salt from seawater | d. | Prevention of rusting |
Chemical changes are important in our day-to-day life. Give examples.
