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Q.

Amongst ${NO}_{3}^{-}, {AsO}_{3}^{3 -}, {CO}_{3}^{2 -}, {ClO}_{3}^{-}, {SO}_{3}^{2 -} and {BO}_{3}^{3 -}$ , the non-planar species are

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a

${NO}_{3}^{-}, {CO}_{3}^{2 -}, {BO}_{3}^{3 -}$

b

${CO}_{3}^{2 -}, {SO}_{3}^{2 -}, {BO}_{3}^{3 -}$

c

${AsO}_{3}^{3 -}, {ClO}_{3}^{-}, {SO}_{3}^{2 -}$

d

${SO}_{3}^{2 -}, {NO}_{3}^{-}, {BO}_{3}^{3 -}$

answer is B.

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Detailed Solution

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Species	Hybridization	Geometry	Number of lone pairs
NO³⁻	sp²	Trigonal planar	Zero
${AsO}_{3}^{3 -}$	sp³	Pyramidal	One
${CO}_{3}^{2 -}$	sp²	Trigonal planar	Zero
${ClO}_{3}^{-}$	sp³	Pyramidal	One
${SO}_{3}^{2 -}$	sp³	Pyramidal	One
${BO}_{3}^{3 -}$	sp²	Trigonal planar	Zero

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Amongst NO3−,AsO33−,CO32−,ClO3−,SO32− and BO33−, the non-planar species are