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प्रश्न
Name the following:
The type of change physical or chemical involved – ‘during respiration in human beings’.
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उत्तर
Chemical Change.
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संबंधित प्रश्न
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Balance the following equation :
Fe + H2O → Fe3O4 + H2
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Explain by writing a word equation.
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Pb(NO3)2 + KI →
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\[\ce{CuCO3 ->[\Delta]}\]
Give a word equation for the following reaction.
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- Colour change
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- Evolution or absorption of heat
- Formation of a precipitate.
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Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
Complete the table given below.
| Heat on copper carbonate | Test for gas evolved |
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\[\ce{H->H+}\]
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
______ is not a chemical change.
Chemical change is a temporary change.
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- It changes colour.
- It changes taste.
- The change cannot be reversed.
Choose the correct option from below:
Which of the following statement is incorrect for a chemical reaction?
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______ is the chemical name of limestone.
What are the chemical reactions that occur in everyday life?
