Assertion :Silicon is not expected to form an allotrope with graphite like structures. Reason: There is feasibility to $p - p π$ bond in silicon.

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.
(i) There is feasibility to $p - p π$ bond in silicon(ii) $π -$ bonding between oxygen and silicon involving $p -$ and $d -$ orbitals decreases availability of lone-pairs of electrons on oxygen.
(ii) Contrary to $(C H_{3})_{2} O, (S i H_{3})_{2} O$ does not form addition compound with $B F_{3}$ .
SO Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Hence option A is correct.

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