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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
Changes in which only ______ properties of a substance change are called physical changes.
Write short answer.
Give an example of desirable change which can also be undesirable
A burning candle shows both physical and chemical changes. Explain ?
Fill in the blank.
When a candle burns, wax melts. Melting of wax is a ________ change.
Tick the most appropriate answer.
Physical changes are
Write true or false
Deforestation is a man-made change.
Which of the following are physical changes and which are chemical changes ?
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
______ is the substance that is dissolved in a solvent.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
