Identify the correct statement(s).

P: The burning of coal does not produce a new substance.
Q: Heating of ammonium chloride is an irreversible chemical change.
R: Baking of cake is a chemical change.
S: Beating of aluminium to form thin foils is a physical change.

Q, R, and S

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Q and R

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R and S

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P, Q, and S

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Solution

The correct option is C R and S

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Identify the correct statement(s).​ P: The burning of coal does not produce a new substance.​ Q: Heating of ammonium chloride is an irreversible chemical change. ​ R: Baking of cake is a chemical change.​ S: Beating of aluminium to form thin foils is a physical change.​

The correct option is C R and S

Identify the correct statement(s).

P: The burning of coal does not produce a new substance.
Q: Heating of ammonium chloride is an irreversible chemical change.
R: Baking of cake is a chemical change.
S: Beating of aluminium to form thin foils is a physical change.