Primary nitroalkanes are obtained in good yield by oxidizing aldoximes with the help of:

trifluoroperoxyacetic acid

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acidified potassium permanganate

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concentrated nitric acid

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potassium dichromate and dilute sulphuric acid

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Solution

The correct option is D trifluoroperoxyacetic acid
Primary nitroalkanes are obtained in good yield by oxidising aldoximes with the help of trifluoroperoxyacetic acid.
$R C H = N - O H + [O] t r i f l u o r o p e r o x y a c e t i c a c i d - --------------- \to R - C H = N^{+} (O^{-}) - O H ⇌ R - C H_{2} - N O_{2}$
Note:
Secondary nitroalkanes are obtained in good yield by oxidising ketoximes with the help of trifluoroperoxyacetic acid.

Option A is correct.

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