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 Assertion: Silicon forms stable hydrides, whereas boron does not.

Reason: Boron has a lower electronegativity than silicon.

Option: 1

Both assertion and reason are true, and the reason is the correct explanation of the assertion.


Option: 2

Both assertion and reason are true, but the reason is not the correct explanation of the assertion.


Option: 3

The assertion is true, but the reason is false.


Option: 4

The assertion is false, but the reason is true.


Answers (1)

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The Assertion is true because boron does not form stable hydrides, whereas silicon forms stable hydrides due to their different electronegativities. The Reasoning is also true because boron has a lower electronegativity than silicon, making it difficult for it to attract electrons from hydrogen and form stable hydrides, whereas silicon has a higher electronegativity than boron, which allows it to form stable hydrides. Hence option A is the correct answer.

Option(2) Both assertion and reason are true and the reason explains assertion correctly. Hence option 2 is incorrect.

Option(3) Both assertion and reason are true. Hence option 3 is incorrect.

Option(4) Both assertion and reason are true. Hence option 4 is incorrect.

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Nehul

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