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प्रश्न
Which of the following statement is incorrect for a chemical reaction?
पर्याय
Heat may be given out but never absorbed.
The sound may be produced.
A colour change may take place.
A gas may be evolved.
उत्तर
Heat may be given out but never absorbed.
Explanation:
Heat may be given out or absorbed during a chemical reaction.
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संबंधित प्रश्न
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
| Reactants | Products | Type of chemical reaction |
| BaCl2(aq) + ZnSO4(aq) | H2CO3(aq) | Displacement |
| 2AgCl(s) | FeSO4(aq) + Cu(s) | Combination |
| CuSO4(aq) + Fe(s) | BaSO4↓ + ZnCl2(aq) | Decomposition |
| H2O(l) + CO2(g) | 2Ag(s) + Cl2(g) | Double displacement |
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Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
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\[\ce{Ag->Ag+}\]
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