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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
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Formation of manure from leaves is a physical change.
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Condensation of steam is not a chemical change.
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
How is a strong electrolyte different from a weak electrolyte?
Fill in the blank.
Melting of ice is a _______ change.
What do you observe? When
Barium chloride is added to sodium sulphate solution
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
Give reason for the following:
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
Water boiling into water vapour is an example of chemical change.
