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प्रश्न
A chemical change may involve –
पर्याय
change in colour only
change in temperature only
evolution of gas only
any or all of the above
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उत्तर
any or all of the above
Explanation:
A chemical change may involve a change in colour, temperature, smell or evolution of gas, heat, etc.
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संबंधित प्रश्न
State four conditions necessary for a chemical reaction to take place.
Balance the following equation :
Fe + H2O → Fe3O4 + H2
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
Write the chemical reaction where the following changes are observed.
Gas is evolved
Give an example of a photochemical reaction.
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
Burning of paper is the best example of ______ change.
State whether the following statement is true or false:
When a candle burns, both physical and chemical changes take place.
Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.
