Subject :NSO Class : Class 7
Which of the following statements is false regarding physical and chemical properties?
A The composition of matter need not be changed for observing a physical change.
B During a chemical reaction, molecules undergo a change and their concentration keeps decreasing along with time.
C Chemical property is the ability of matter to undergo some chemical change because of its composition.
D During a chemical reaction, same molecules are present throughout the change.
Ans 1: (Master Answer)
Class : Class 1
The correct answer is D.