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Question
Classify the following as physical or chemical change :
Formation of curd from milk
Options
Physical change
Chemical change
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Solution
Formation of curd from milk – Chemical change
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Solve this crossword by using the clues that follow.

Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1. It is the change that takes place in case of swinging pendulum of a clock.
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
True or false
In a physical change no net energy change is involved.
Classify the following as a physical or a chemical change.
Drying of wet clothes
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
Select the chemical changes from the following list of changes
Respiration in mammals.
Select the chemical changes from the following list of changes
Butter turning rancid
Select the chemical changes from the following list of changes
Change of seasons
In a solution of salt in water, water is the solute
Water is known as a universal solvent. Why?
