Single Choice

Which of the following does not possess alpha hydrogen?

AAcetaldehyde
BFormaldehyde
Correct Answer
CAcetone
DPhenyl acetaldehyde

Solution

The chemical formula of formaldehyde is $$HCHO$$ which has a single carbon.

As there is no $$\alpha$$ carbon, there is no $$\alpha$$ hydrogen.

The chemical formula of acetaldehyde, acetone and phenyl acetaldehyde are $$CH_3CHO$$, $$CH_3COCH_3$$ and $$PhCH_2CHO$$ respectively.

Thus, all these three possess an alpha hydrogen.

Option B is correct.

SIMILAR QUESTIONS

Physical World

Draw the structure of the hexanal molecule.

Physical World

Which of the following structures is not correctly matched?

Physical World

Write the structural formula for each of the following. Three aldehydes with the formula $$C_{5}H_{10}O$$.

Physical World

Which of the following statements are correct about the following reaction ?

Physical World

A compound has molecular formula $$C_6H_{12}O.$$ It does not reduce Tollens or Fehling's reagent, but gives a crystalline derivative with 2,4-dinitro-phenyl hydrazine. With alkali and $$I_2,$$ it gives yellow solid with a medicinal odour. Clemmensen reduction converts it to 2-methylpentane. The structural formula of the compound is most likely to be:

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