Aldehydes, Ketones and Carboxylic Acids
Compound $\mathrm{P}\left(\mathrm{C}_8 \mathrm{H}_8 \mathrm{O}\right)$ gives a red orange precipitate with 2,4-DNP reagent and it does not reduce Fehling's reagent. On drastic oxidation with chromic acid, $P$ gives an aromatic product $Q$ that produces effervescence on treating with aq. $\mathrm{NaHCO}_3$. Compounds P and Q , respectively, are :
$ \text { Match List I with List II: } $
Choose the correct answer from the options given below :
A-II, B-III, C-I, D-IV
A-II, B-III, C-IV, D-I
A-II, B-IV, C-III, D-I
A-I, B-III, C-IV, D-II
In a test tube containing a salt, a few drops of dilute $\mathrm{H}_2 \mathrm{SO}_4$ was added, which gave colourless vapours having the smell of vinegar. The vapours turned the blue litmus paper red.
Identify the correct anion from the following :
Sulphide, $\mathrm{S}^{2-}$
Sulphate, $\mathrm{SO}_4^{2-}$
Acetate, $\mathrm{CH}_3 \mathrm{COO}^{-}$
Carbonate, $\mathrm{CO}_3^{2-}$
Consider the following reaction, and choose the correct option.
Compound $\mathbf{P}$ is obtained by the hydrogenation of benzoyl chloride with Pd on $\mathrm{BaSO}_4$
On treating compound $\mathbf{P}$ with saturated $\mathrm{NaHCO}_3$ solution, brisk effervescence is observed
Compound $\mathbf{P}$ can be prepared by treating benzene with anhydrous $\mathrm{AlCl}_3$ and $\mathrm{CH}_3 \mathrm{COCl}$
On treating with bromine water, compound $\mathbf{P}$ gives a white precipitate
$ \text { The compound that CANNOT be obtained from the aldol condensation reaction shown below, is } $
$ \text { For the following reaction sequence, choose the correct option } $
Both $\mathbf{P}$ and $\mathbf{Q}$ are carbonyl compounds
If $\mathbf{P}$ is the sodium salt of a carboxylic acid, $\mathbf{Q}$ is a primary alcohol
$\mathbf{P}$ and $\mathbf{Q}$ are aromatic compounds
If $\mathbf{P}$ gives a carboxylic acid on acidification, $\mathbf{Q}$ gives a poisonous gas on exposure to air and light
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.
(i) $\mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}$
(ii) $\mathrm{CrO}_3$
(i) $\mathrm{BH}_3$
(ii) $\mathrm{H}_2 \mathrm{O}_2 / \stackrel{\ominus}{\mathrm{O}} \mathrm{H}$
(iii) PCC
(i) $\mathrm{BH}_3$
(ii) $\mathrm{H}_2 \mathrm{O}_2 / \stackrel{\ominus}{\mathrm{O}} \mathrm{H}$
(iii) alk. $\mathrm{KMnO}_4$
(i) $\mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}$
(ii) PCC
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.
Y-Ethanoic acid, Z-Semicarbazide.
Y-But-2-enal, Z-Semicarbazone.
Y-Butanone, Z-Hydrazone.
Y-Acetate ion, Z-Hydrazine.
is
with methyl lithium gives which of the following species ?
