Which of the following is not a sign that a chemical reaction has occurred? a) Change in temperature b) Change in shape c) Change in colour d) Forma9on of a gas
Answers
Answered by
6
b) change in shape is not the sign of chemical reaction
Answered by
2
The option which is not a sign of a chemical reaction's occurrence is (b) Change in Shape
Explanation:
- A chemical reaction is the transformation of one chemical substance into another chemical substance which leads to alteration in molecules chemically. It changes a substance's chemical composition.During a chemical reaction, the following changes can occur:
⇒ Change in temperature: When Calcium oxide reacts with water
⇒ Change in color: Displacement of copper by iron in copper sulphate solution.
⇒ Formation of gas: Photosynthesis
⇒ But, change in shape is a physical reaction which just changes the structure of molecules physically. For example: molding of clay.
Hence, the option which is not a sign of a chemical reaction's occurrence is (b) Change in Shape
Similar questions