Aldehydes, Ketones and Carboxylic Acids
Given below are two statements :
Statement I : The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.
Statement II : Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reaction.
Choose the most appropriate option :
Isobutyraldehyde on reaction with formaldehyde and K2CO3 gives compound 'A'. Compound 'A' reacts with KCN and yields compound 'B', which on hydrolysis gives a stable compound 'C'. The compound 'C' is
The correct structure of product 'A' formed in the following reaction.
is
'A' and 'B' respectively are:
Which of the following reactions will yield benzaldehyde as a product?
Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents?
The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is
The final product 'A' in the following reaction sequence
(C7H5O2)2 $\buildrel {hv} \over \longrightarrow $ [X] $\to$ 2C6H5 + 2CO2
Consider the above reaction and identify the intermediate 'X'
Which will have the highest enol content?
Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?
Two statements are given below :
Statement I : The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with odd number of carbon atoms acid immediately below and above it in the series.
Statement II : The solubility of monocarboxylic acids in water decreases with increase in molar mass.
Choose the most appropriate option :
The number of stereoisomers formed in a reaction of $(±)\mathrm{Ph}(\mathrm{C}=\mathrm{O}) \mathrm{C}(\mathrm{OH})(\mathrm{CN}) \mathrm{Ph}$ with $\mathrm{HCN}$ is ___________.
$\left[\right.$where $\mathrm{Ph}$ is $-\mathrm{C}_{6} \mathrm{H}_{5}$]
Explanation:
Number of stereoisomers = 3
The spin only magnetic moment of the complex present in Fehling's reagent is __________ B.M. (Nearest integer).
Explanation:
So, spin only magnetic moment
$ =\sqrt{1(1+2)} $
$ \begin{aligned} & =\sqrt{3} \simeq 2 \mathrm{~B} . \mathrm{M} \end{aligned} $
In the given reaction
The number of chiral carbon/s in product A is ___________.
Explanation:
2 chiral carbons are there in product A.
A hydrocarbon 'X' is found to have molar mass of 80. A 10.0 mg of compound 'X' on hydrogenation consumed 8.40 mL of H2 gas (measured at STP). Ozonolysis of compound 'X' yields only formaldehyde and dialdehyde. The total number of fragments/molecules produced from the ozonolysis of compound 'X' is _____________.
Explanation:
moles consumed of $\mathrm{H}_{2}=\frac{8.4}{22.4} 0.375 \mathrm{~m} \mathrm{~mol}$.
$\frac{\mathrm{n}_{\mathrm{H}_{2}}}{\mathrm{n}_{\mathrm{X}}}=\frac{0.375}{0.125}=3$
So, the compound $\mathrm{X}$ have 3 double bond.
Ozonolysis of the compound yield formaldehyde and dialdehyde.
The compound is
$ \mathrm{H}_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_{2} $
Molecular mass $=(12 \times 6)+1 \times 8=72+8=80 \,\mathrm{amu}$
Ozonolysis form:
In the given reaction,
The number of $\pi$ electrons present in the product 'P' is _________.
Explanation:
Considering the reaction sequence given below, the correct statement(s) is(are)
Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.
Statement II : The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.
In the light of the above statements, choose the most appropriate answer from the options given below :
The compound which is not formed as a product in the reaction is a :
Statement I : Ethyl pent-4-yn-oate on reaction with CH3MgBr gives a 3$^\circ$-alcohol.
Statement II : In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH3MgBr.
In the light of the above statements, choose the most appropriate answer from the options given below :
Maleic anhydride can prepared by :
[where $Et \Rightarrow - {C_2}{H_5}{}^tBu \Rightarrow {(C{H_3})_3}C - $]
Consider the above reaction sequence, Product "A" and Product "B" formed respectively are :
Consider the given reaction, the product 'X' is :
The correct order of their reactivity towards hydrolysis at room temperature is :
Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?
Consider the above reaction, the product 'X' and 'Y' respectively are :
Consider the above chemical reaction and identify product "A"
Considering the above chemical reaction, identify the product "X" :
The product ''A'' in the above reaction is :
In the above reaction, the reagent ''A'' is :
The product ''P'' in the above reaction is :
Reason R : Enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone.
Choose the correct statement :
Considering the above reaction, the major product among the following is :
