Aldehydes, Ketones and Carboxylic Acids · Chemistry · NEET
MCQ (Single Correct Answer)
Identify the suitable reagent for the following conversion.
The correct order of decreasing acidity of the following aliphatic acids is
Select the incorrect reaction among the following :
Identify the correct reagents that would bring about the following transformation.
Match List I with List II.
List I (Reaction) |
List II (Reagents/Condition) |
||
---|---|---|---|
A. | ![]() |
I. | ![]() |
B. | ![]() |
II. | CrO$$_3$$ |
C. | ![]() |
III. | KMnO$$_4$$/KOH, $$\Delta$$ |
D. | ![]() |
IV. | (i) O$$_3$$ (ii) Zn-H$$_2$$O |
Choose the correct answer from the options given below:
For the given reaction:
'P' is
Consider the given reaction:
$$\mathrm{CH}_3 \mathrm{COCH}_3 \stackrel{\text { dil } \mathrm{Ba}(\mathrm{OH})_2}{\longrightarrow} \text { ''X" }$$
The functional groups present in compound "$$\mathrm{X}$$" are:
Identify 'X' in above reactions
The following conversion is known as:
Reagents which can be used to convert alcohols to carboxylic acids, are
(A) $$\mathrm{CrO}_3-\mathrm{H}_2 \mathrm{SO}_4$$
(B) $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+\mathrm{H}_2 \mathrm{SO}_4$$
(C) $$\mathrm{KMnO}_4+\mathrm{KOH} / \mathrm{H}_3 \mathrm{O}^{+}$$
(D) $$\mathrm{Cu}, 573 \mathrm{~K}$$
(E) $$\mathrm{CrO}_3,\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O}$$
Choose the most appropriate answer from the options given below :
The major product formed in the following conversion is ___________.
Complete the following reaction:
[C] is _______.
Identify the major product obtained in the following reaction:
Identify the final product [D] obtained in the following sequence of reactions.
Which of the following reactions is not an example for nucleophilic addition-elimination reaction?
The product formed from the following reaction sequence is
Match List-I with List-II :
List-I (Reaction) |
List-II (Product formed) |
||
---|---|---|---|
(a) | Gabriel synthesis | (i) | Benzaldehyde |
(b) | Kolbe synthesis | (ii) | Ethers |
(c) | Williamson synthesis | (iii) | Primary amines |
(d) | Etard reaction | (iv) | Salicylic acid |
Choose the correct answer from the options given below :
The incorrect method to synthesize benzaldehyde is
Given below are two statements :
Statement I : The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole - dipole interactions.
Statement II : The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding.
In the light of the above statements, choose the most appropriate answer from the given below
RMgX + CO2 $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{ether}^{dry}} $$ Y $$\buildrel {{H_3}{O^ + }} \over \longrightarrow $$ RCOOH
What is Y in the above reaction?
Match List-I with List-II.
List - I (Products formed) |
List - II (Reaction of carbonyl compound with) |
||
---|---|---|---|
(a) | Cyanohydrin | (i) | NH$$_2$$OH |
(b) | Acetal | (ii) | RNH$$_2$$ |
(c) | Schiff's base | (iii) | Alcohol |
(d) | Oxime | (iv) | HCN |
Choose the correct answer from the options given below
Compound X on reaction with O3 followed by Zn/H2O gives formaldehyde and 2-methyl propanal as products. The compound X is
Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?


Consider the above reaction and identify the missing reagent/chemical.

Choose the correct answer from the options given below.




Identify A, X, Y and Z.

is


with methyl lithium gives which of the following species ?

RCHO + NH2NH2 $$ \to $$ RCH $$=$$ N $$-$$ NH2
What sort of reaction is it?

The product A is


List-I |
List-II |
||
---|---|---|---|
(A) | Benzaldehyde | (i) | Phenolphthalein |
(B) | Phthalic anhydride | (ii) | Benzoin condensation |
(C) | Phenyl benzoate | (iii) | Oil of wintergreen |
(D) | Methyl salicylate | (iv) | Fries rearrangement |


The correct decreasing order of their reactivity towards hydrolysis is

The structure of D would be

The structure of D would be

is

CH3CHO + HCN $$ \to $$ CH3CH(OH)CN
$$\buildrel {HOH} \over \longrightarrow $$ CH3CH(OH)COOH
an asymmetric centre is generated. The acid obtained would be

Product $$C$$ would be

In the above reaction product P is

are
