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प्रश्न
Photosynthesis is a chemical reaction that takes place in the presence of ______.
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उत्तर
Photosynthesis is a chemical reaction that takes place in the presence of Sunlight.
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संबंधित प्रश्न
Name three biochemical catalysts found in the human body.
Write the missing reactants and products and balance the equations.
................+ HCI `→` NaCI + `"H"_2"O"` + .........................
FILL IN THE BLANK
Negatively charged ions are called ..........
Give an example of a reaction where the following are involved:
Close contact
What do you observe? When
Barium chloride is added to sodium sulphate solution
What do you observe? When
Water is added to the quick lime.
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
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.
True or False. If false, give the correct answer.
Taking a glass of water and freezing it by placing it in the freezer is a chemical change.
Classify the following processes into physical or chemical changes:
- Beating of aluminium metal to make aluminium foil.
- Digestion of food.
- Cutting of a log of wood into pieces.
- Burning of crackers.
