Assertion :The energy bands in a solid correspond to the energy levels in an atom. Reason: An electron in a solid can have only energies that fall with these energy bands.

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
In a solid, the energy levels of atoms in a crystal gets modified due to the interaction between atoms forming the solid. Since there are several atoms in a solid. The energy levels of inner orbit electrons of an atom are not influenced by the neighboring atoms as these electrons are tightly bound to their parent nucleus. However, the energy levels of outer orbit electrons of an atom are altered as these are influenced by the neighboring atoms. Hence, outer orbit electrons of an atom are common to several neighboring atoms. Therefore, energy levels corresponding to outer shell electrons spread up to form a band of energy. A band of energy consists of very closely spaced energy levels.

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Similar questions

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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