Aldehydes, Ketones and Carboxylic Acids
Identify major product "X" formed in the following reaction :
What is the structure of C?
Identify the product (P) in the following reaction:
Consider the given reaction, identify the major product P.
Which among the following aldehydes is most reactive towards nucleophilic addition reactions?
Identify A and B in the given chemical reaction sequence :
Consider the given chemical reaction :
Product "A" is :
Identify 'A' in the following reaction :
Given below are two statements :
Statements I : Acidity of $\alpha$-hydrogens of aldehydes and ketones is responsible for Aldol reaction.
Statement II : Reaction between benzaldehyde and ethanal will NOT give Cross - Aldol product.
In the light of the above statements, choose the most appropriate answer from the options given below :
Identify the product in the following reaction:
| List I (Reactions) | List II (Reagents) |
|---|---|
(A)  |
(I) CH3MgBr, H2O |
| (B) C6H5COC6H5 ⟶ C6H5CH=C6H5 | (II) Zn(Hg) and conc. HCl |
| (C) C6H5CHO ⟶ C6H5CH(OH)CH3 | (III) NaBH4, H+ |
(D)  |
(IV) DIBAL-H, H2O |
Choose the correct answer from the options given below :
Identify major product 'P' formed in the following reaction.
Identify the name reaction.
Salicylaldehyde is synthesized from phenol, when reacted with
m-chlorobenzaldehyde on treatment with 50% KOH solution yields :
This reduction reaction is known as:
Structure of 4-Methylpent-2-enal is :
Identify the reagents used for the following conversion
The molecular formula of second homologue in the homologous series of mono carboxylic acids is
Highest enol content will be shown by:
Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous $\mathrm{NaOH}$ after heating gives $x$ as the major product. The number of $\pi$ bonds in the product $x$ is ______.
Explanation:
Total number of $\pi$ bonds in $X=9$
The product C in the following sequence of reactions has ________ $\pi$ bonds.
Explanation:
Number of $\pi$ bonds in (C) = 4
In the Claisen-Schmidt reaction to prepare $351 \mathrm{~g}$ of dibenzalacetone using $87 \mathrm{~g}$ of acetone, the amount of benzaldehyde required is _________ g. (Nearest integer)
Explanation:
$\begin{aligned} & \text { mol of benzaldehyde required }=1.5 \times 2 \\ &=3 \mathrm{~mol} \\ & \text { mass }=318 \mathrm{~g} \end{aligned}$
Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and $\pi$ electrons is __________.
Explanation:
To determine the total sum of oxygen atoms and $\pi$ electrons in vanillin, let's first consider the structure of vanillin. Vanillin is an organic compound with the chemical formula $C_8H_8O_3$. It consists of a benzene ring attached to a methoxy group (-OCH3), a hydroxyl group (-OH), and an aldehyde group (-CHO).
Firstly, let's count the oxygen atoms:
- One from the methoxy group (-OCH3)
- One from the hydroxyl group (-OH)
- One from the aldehyde group (-CHO)
Thus, there are a total of 3 oxygen atoms in vanillin.
Next, let's calculate the total number of $\pi$ electrons:
- The benzene ring has 3 double bonds, contributing 6 $\pi$ electrons.
- The aldehyde group has 1 double bond (C=O), contributing 2 $\pi$ electrons.
- The methoxy group and the hydroxyl group do not contribute any $\pi$ electrons since they do not have $\pi$ bonds in their structures.
Therefore, vanillin has a total of 8 $\pi$ electrons from the benzene ring and the aldehyde group.
Adding the number of oxygen atoms (3) and the $\pi$ electrons (8) gives us a total sum of 11.
Thus, the total sum of oxygen atoms and $\pi$ electrons in vanillin is 11.
The product of the following reaction is P.
The number of hydroxyl groups present in the product P is ________.
Explanation:
Product benzene has zero hydroxyl group
The total number of 'Sigma' and 'Pi' bonds in 2-formylhex-4-enoic acid is _________.
Explanation:
Sigma bonds : 19
pi bonds : 3
From the compounds given below, number of compounds which give positive Fehling's test is _________.
Benzaldehyde, Acetaldehyde, Acetone, Acetophenone, Methanal, 4nitrobenzaldehyde, cyclohexane carbaldehyde.
Explanation:
Acetaldehyde $(\mathrm{CH}_3 \mathrm{CHO})$, Methanal $(\mathrm{HCHO})$, and cyclohexane carbaldehyde 
In the above conversion the correct sequence of reagents to be added is
In the reaction given below
'A' is
The two products formed in above reaction are -
'A' in the above reaction is:
In the following reaction
'A' is
The major product 'P' formed in the following sequence of reactions is
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom.
Reason R : A molecule with 2 chiral carbons is always optically active.
In the light of the above statements, choose the correct answer from the options given below:
'A' and 'B' in the above reactions are:
The major product 'P' formed in the given reaction is
The major product formed in the following reaction is:
Match List I with List II:
| LIST I (Reagents used) | LIST II (Compound with Functional group detected) | ||
|---|---|---|---|
| A. | Alkaline solution of copper sulphate and sodium citrate | I. |  |
| B. | Neutral $\mathrm{FeCl_3}$ | II. |  |
| C. | Alkaline chloroform solution | III. |  |
| D. | Potassium iodide and sodium hypochlorite | IV. |  |
Choose the correct answer from the options given below:
In a reaction,
reagents 'X' and 'Y' respectively are :
The structures of major products A, B and C in the following reaction are sequence.
Consider the following reaction
The correct statement for product B is. It is
Assertion A:
can be easily reduced using $\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$ to 
Reason $\mathrm{R}: \mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$ is used to reduce carbonyl group to $-\mathrm{CH}_{2}-$ group.
In the light of the above statements, choose the correct answer from the options given below:
What is the correct order of acidity of the protons marked $\mathrm{A}-\mathrm{D}$ in the given compounds ?
Which of the following compounds would give the following set of qualitative analysis ?
(i) Fehling's Test : Positive
(ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not prussian blue.
Find out the major products from the following reaction sequence.
'A' in the given reaction is
Identify the product formed (A and E)
