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JEE CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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Analyzing +4 | -1

Assertion :

\mathrm{R}_3 \mathrm{P}=\mathrm{O}

exists but

\mathrm{R}_3 \mathrm{N}=\mathrm{O}

does not exists.

Reason :

\mathrm{P}

is more electronegative than

\mathrm{N}.

View answer and explanation

Correct option: C

If Assertion is True but the Reason is False

Option C (Assertion is True but the Reason is False) is correct because the existence of R3P=O is due to the ability of P to form pi bonds with oxygen, while N cannot form strong pi bonds.

More Questions from CHEMICAL BONDING & MOLECULAR STRUCTURE

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The hybridization in sulphur dioxide is

\mathrm{C}{\mathrm{O}_2}

has the same geometry as:

\left( A \right)\mathrm{HgC}{\mathrm{l}_2},\left( B \right)\mathrm{N}{\mathrm{O}_2},\left( C \right)\mathrm{SnC}{\mathrm{l}_4},\left( D \right){\mathrm{C}_2}{\mathrm{H}_2}

The pair of molecules forming strongest hydrogen bonds are Paramagnetism is shown by Which statement is correct? Assertion (A) :

{BF}_3

is a weaker Lewis acid than

{BCl}_3

.

Reason (R) : The planar

{BF}_3

molecule is stabilised to a greater extent than

{BCl}_3

{B}-X \pi

-bonding.