Select the option that is correct regarding the following two statements labelled Assertion (A) and Reason (R).
Assertion: In insulators, the energy gap between the valence band and conduction band is less than 3 eV.
Reason: The valence electrons in an insulator are very loosely bound to the nucleus.
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A.
Both assertion and reason are false.
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B.
Assertion is true but reason is false.
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C.
Both assertion and reason are true and reason is the correct explanation of assertion.
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D.
Assertion is false but reason is true.
Correct Answer:
A. Both assertion and reason are false.
Explanation:
The assertion that insulators have an energy gap smaller than 3 eV is incorrect; in reality, insulators typically possess a wide band gap, often exceeding 5 eV, which prevents the flow of electricity. Additionally, the reason provided is false because valence electrons in an insulator are tightly bound to the nucleus, rather than loosely, making it difficult for them to transition into the conduction band. Consequently, since both the assertion and the reasoning are scientifically inaccurate, the correct conclusion is that both statements are false.
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