Advertisements
Advertisements
प्रश्न
Write a test to differentiate between pentan-2-one and pentan-3-one.
Advertisements
उत्तर
Pentan--one having a group forms a yellow ppt. of iodoform with an alkaline solution of iodine (i.e., iodoform test) while pentan-3-one does not.
\[\begin{array}{cc}
\ce{O}\phantom{.....................................}\\
||\phantom{.....................................}\\
\ce{CH3CH2\underset{Pentan-2-one}{CH2 - C - CH3} ->[I2/NaOH][(Iodoform test)] \underset{Yellow ppt.}{CHI3} + \underset{Sodium butanoate}{CH3CH2CH2COONa}}
\end{array}\]
APPEARS IN
संबंधित प्रश्न
Write balanced chemical equations for action of ammonia on - formaldehyde
Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction:
C6H5COCH3, CH3-CHO, CH3COCH3
Predict the product of the following reaction:
\[\begin{array}{cc}
\phantom{..............}\ce{O}\\
\phantom{..............}||\\
\ce{R - CH = CH - CHO + NH2 - C - NH - NH2 ->[H+]}\end{array}\]
What is meant by the following term? Give an example of the reaction in the following case.
Acetal
What is meant by the following term? Give an example of the reaction in the following case.
Hemiacetal
What is meant by the following term? Give an example of the reaction in the following case.
Schiff’s base
How will you bring about the following conversion in not more than two steps?
Bromobenzene to 1-Phenylethanol
Give plausible explanation for the following:
There are two −NH2 groups in semicarbazide. However, only one is involved in the formation of semicarbazones.
Which of the following is the correct representation for intermediate of nucleophilic addition reaction to the given carbonyl compound (A):
(i) 
(ii) 
(iii) 
(iv) 
Acetaldehyde and acetone differ in their reaction with
Which among the following is most reactive to give nucleophilic addition?
Write the name of product formed, when acetone is treated with 2, 4-dinitrophenyl hydrazine.
What is the action of sodium hypoiodite on acetone?
Arrange the following in the increasing order of their property indicated:
Ethanal, Propanone, Propanal, Butanone (reactivity towards nucleophilic addition)
Why dissociation of HCN is suppressed by the addition of HCL?
Draw the structure of the following derivative.
The ethylene ketal of hexan-3-one
Draw structure of the following derivative:
Acetaldehydedimethylacetal
Draw structure of the following derivative.
The ethylene ketal of hexan-3-one
Give an example of the reaction in the following case.
Imine
