Photosynthesis Cannot Take Place at Night. - Chemistry

Photosynthesis cannot take place at night.

One Line Answer

Photosynthesis requires sunlight which is not available at night time. Therefore the process stops at night.

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Chapter 2: Physical and Chemical Changes - Additional questions 6

Chapter 2 Physical and Chemical Changes
Additional questions 6 | Q 5

Try segregating the things around you as pure substances or mixtures.

Write short answer.

Give an example of desirable change which can also be undesirable

Classify the following changes as physical or chemical: curdling of milk

Fill in the blank

Changes that occur in nature are called ______

State one instance where water undergoes a physical change and one in which it undergoes a chemical change.

Classify the following as physical or chemical change :

Formation of curd from milk

Is a change of state of matter – a physical or a chemical change. Give reasons.

Select the chemical changes from the following list of changes

Vaporisation of water into water vapour.

Select the correct answer from the choice given below to complete the sentence

A change in which a substance retains its identity is a

______ change.

Select the correct answer from the choice given below to complete the sentence

The dissolution of lead nitrate in water is deemed as a _________ change.