Assertion (A): Hydrogen has one electron in its orbit but it produces several spectral lines.
Reason (R): There are many excited energy levels available.

Both A and R are rue and R is the correct explanation of A

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Both A and R are true and R is not correct explanation of A

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A is correct and R is incorrect.

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A is incorrect and R is correct.

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Solution

The correct option is A Both A and R are rue and R is the correct explanation of A
$A \to$ different lines correspond to different transitions.
$B \to$ different transitions are due to different excited states available.

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Assertion (A): Hydrogen has one electron in its orbit but it produces several spectral lines.Reason (R): There are many excited energy levels available.

The correct option is A Both A and R are rue and R is the correct explanation of AA→ different lines correspond to different transitions. B→ different transitions are due to different excited states available.

Assertion (A): Hydrogen has one electron in its orbit but it produces several spectral lines.
Reason (R): There are many excited energy levels available.

The correct option is A Both A and R are rue and R is the correct explanation of A
$A \to$ different lines correspond to different transitions.
$B \to$ different transitions are due to different excited states available.