JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason
R.
Assertion A: Energy of 2s orbital of hydrogen atom is greater than that of 2s orbital of lithium.
Reason R : Energies of the orbitals in the same subshell decrease with increase in the atomic number.
In the light of the above statements, choose the correct answer from the options given below.

View answer and explanation

Correct option: A

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

Option A is correct because both the assertion and reason are true, and the reason correctly explains the assertion. The energy of a 2s orbital decreases with increasing atomic number due to the increased nuclear charge.

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