Advertisements
Advertisements
प्रश्न
Give an example of the following chemical changes.
A photochemical reaction involving silver salt.
Advertisements
उत्तर
\[\ce{2AgNO3->[sunlight] 2Ag + 2NO2 + O2}\]
APPEARS IN
संबंधित प्रश्न
Give scientific reasons.
While preparing dil. Sulphuric acid from concentrated conc. sulphuric acid in the laboratory the concentrated sulphuric acid is, add slowly to water with constant stirring.
Name a carbonate which do not decompose on heating.
State which type of chemical reaction proceeds with the absorption of heat energy.
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.
Chemical reactions may proceed with absorption of heat. Give an example.
True or False. If false, give the correct answer.
Tarnishing of silver is an example of endothermic 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 a 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.
