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प्रश्न
Give an example of the following chemical changes.
A photochemical reaction involving silver salt.
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उत्तर
\[\ce{2AgNO3->[sunlight] 2Ag + 2NO2 + O2}\]
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संबंधित प्रश्न
Define endothermic reactions. Give two examples of each.
Name a carbonate which do not decompose on heating.
State the following reaction whether heat is evolved or absorbed –
Two neutral gases combine to give a basic gas.
Complete the statement by filling in the blank with the correct word:
The reaction of coke with steam to give water gas is an example of an __________ reaction.
Give an example with a balanced equation, of the following reaction:
endothermic reaction
Give an example with a balanced equation, of the following reaction:
electrochemical reaction
Respiration is a ______ change.
Match the following:
| Colum I | Column II | ||
| 1. | Alloying | a. | Exothermic change |
| 2. | Crystallization | b. | Periodic change |
| 3. | Soap powder + water | c. | Mixing of molten solids |
| 4. | Seasonal changes | d. | Pure solid |
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
