Assertion :Total energy of an electron in an hydrogen atom is negative. Reason: It is bounded to the nucleus.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Electron is bound to nucleus by electrostatic force of attraction. Now, that it revolves in an orbit as well, its kinetic energy is not enough so that it can break free form the orbit. Hence the total energy of electron is negative. Therefore, both assertion and reason are correct and reason is the correct explanation of assertion.

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