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Q.

Which of the following factors indicate that a chemical reaction has taken place?

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a

Change of state

b

Color change

c

Change in temperature

d

All of above

answer is D.

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Detailed Solution

  • Any of the following alterations can be used to prove that a chemical reaction has occurred.
  • Creation of new materials, state change, color change, change in temperature, development of a precipitate, and growth of a gas
  • For instance, we can state that a chemical reaction occurs if a gas is produced after combining two substances.
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