Assertion (A) : It is impossible to determine the exact position and exact momentum of an electron simultaneously.

Reason (R) : The path of an electron in an atom is clearly defined.

(i) Both A and R are true and R is the correct explanation of A.

(ii) Both A and R are true and R is not the correct explanation of A.

(iii) A is true and R is false.

(iv) Both A and R are false.

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Answered by

Vishal Baghel | Contributor-Level 10

4 months ago

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: option (iii)

According to Heisenberg's uncertainty principle it is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron. Thus, it implies that determining the trajectory of

an electron is impossible as it requires exact position and velocity which is not possible as per the uncertainty principle.

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