Q.

Which among the following statements is correct?I) : CF2 is more stable than : CCl2II) :CCl2 is more stable than : CBr2III) singlet : CH2 is more stable than triplet : CH2IV)  singlet carbene has planar geometry

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a

I, II, IV

b

II, IV

c

I, II, III

d

II, III, IV

answer is A.

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Detailed Solution

Triple carbene is more stable than singlet; CF2 is more stable due to back bonding.
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Which among the following statements is correct?I) : CF2 is more stable than : CCl2II) :CCl2 is more stable than : CBr2III) singlet : CH2 is more stable than triplet : CH2IV)  singlet carbene has planar geometry