Advertisements
Advertisements
प्रश्न
Give an example of a photochemical reaction.
Advertisements
उत्तर
\[\ce{6CO2 + 6H2O -> C6H12O6 + 6O2}\]
संबंधित प्रश्न
Give a reason.
Wasp sting is treated with vinegar.
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Thermal decomposition of mercury [II] oxide.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Copper nitrate.
Heat may evolve or be absorbed during a ______ change.
Photosynthesis is a chemical charge. Justify your answer.
The reaction of H2 gas with oxygen gas to form water is an example of ______.
