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प्रश्न
Draw the structure of the semicarbazone of ethanal.
उत्तर
\[\begin{array}{cc}
\ce{H3C}\phantom{.........................}\ce{O}\phantom{..................}\ce{H}\phantom{..............}\ce{O}\phantom{.............}\\
\phantom{..}\backslash\phantom{........................}||\phantom{...................}|\phantom{...............}||\phantom{...........}\\
\ce{\underset{Ethanal}{C = O} + H2N - NH - C - NH2 -> \underset{Semicarbazone}{CH3 - C = N - NH - C - NH2}}\\
/\phantom{.....................................................................}\\
\ce{H}\phantom{........................................................................}\\
\end{array}\]
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संबंधित प्रश्न
Write the structures of the main products when acetone (CH3 − CO − CH3) reacts with the following reagent :
H2N − NHCONH2/H+
Write the products formed when CH3CHO reacts with the following reagents : H2N – OH
What is meant by the following term? Give an example of the reaction in the following case.
Acetal
How are the following compounds prepared?
acetophenone from benzene
Which of the following is the correct representation for intermediate of nucleophilic addition reaction to the given carbonyl compound (A):
(i) 
(ii) 
(iii) 
(iv) 
Alkenes 
and carbonyl compounds 
, both contain a π bond but alkenes show electrophilic addition reactions whereas carbonyl compounds show nucleophilic addition reactions. Explain.
What happens when ethanal is treated with excess ethanol and acid?
Draw structures of the given derivatives.
The ethylene ketal of hexan-3-one
Draw the structure of the following derivative.
The ethylene ketal of hexane-3-one
Draw structure of the following derivative:
Acetaldehydedimethylacetal
