Assertion : $S e C l_{4}$ doesnot have a tetrahedral structure.
Reason: $S e$ in $S e C l_{4}$ has two lone pairs.

Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion

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Both Assertion and Reason are true but Reason is not a correct explanation of the Assertion

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Assertion is true but Reason is false

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Both the Assertion and Reason are false

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Assertion is false but the Reason is true

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Solution

The correct option is C Assertion is true but Reason is false

$S e {C l}_{4}$ has distorted trigonal pyramid geometry.
Here, Se has only one lone pair of electrons and so, it is $s p^{3} d$ hybridised.
Hence, assertion is true but reason is false.

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Assertion : SeCl4 doesnot have a tetrahedral structure.Reason: Se in SeCl4 has two lone pairs.

The correct option is C Assertion is true but Reason is falseSeCl4 has distorted trigonal pyramid geometry.Here, Se has only one lone pair of electrons and so, it is sp3d hybridised.Hence, assertion is true but reason is false.

Assertion : $S e C l_{4}$ doesnot have a tetrahedral structure.
Reason: $S e$ in $S e C l_{4}$ has two lone pairs.

The correct option is C Assertion is true but Reason is false

$S e {C l}_{4}$ has distorted trigonal pyramid geometry.
Here, Se has only one lone pair of electrons and so, it is $s p^{3} d$ hybridised.
Hence, assertion is true but reason is false.