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प्रश्न
Photosynthesis cannot take place at night.
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उत्तर
Photosynthesis requires sunlight which is not available at night time. Therefore the process stops at night.
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संबंधित प्रश्न
State three differences between evaporation and boiling
Write true or false
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Name two reversible changes.
Give two examples of periodic changes.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Stretching gold coin into a ring is a ______ change.
Water is the universal solvent. Why?
A physical change is generally____________.
Mention some of the different conditions needed for chemical changes to occur.
