Organic Chemistry PYQ — Page 13

Designate whether each of the following compounds is aromatic or not aromatic. 

In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was ______ %.

The product (A) formed in the following reaction sequence is 

Mixture of 1 g each of chlorobenzene, aniline and benzoic acid is dissolved in 50 mL ethyl acetate and placed in a separating funnel, 5 M NaOH ( 30 mL) was added in the same funnel. The funnel was shaken vigorously and then kept aside. The ethyl acetate layer in the funnel contains :

Identify the pair of reactants that upon reaction, with elimination of HCl will give rise to the dipeptide Gly-Ala.


The major product (A) formed in the following reaction sequence is 

The IUPAC name of the following compound is : 

The major product of the following reaction is : 

Given below are two statements : Statement I : $\mathrm{CH}_3-\mathrm{O}-\mathrm{CH}_2-\mathrm{Cl}$ will undergo $\mathrm{S}_{\mathrm{N}} 1$ reaction though it is a primary halide. Statement II :  will not undergo $S_N 2$ reaction very easily though it is a primary halide. In the light of the above statements, choose the most appropriate answer from the options given below :

The total number of compounds from below when treated with hot $\mathrm{KMnO}_4$ giving benzoic acid is : 

Consider the following sequence of reactions to produce major product (A)  Molar mass of product $(\mathrm{A})$ is $\qquad$ $\mathrm{g} \mathrm{mol}^{-1}$. (Given molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ of $\mathrm{C}: 12, \mathrm{H}: 1, \mathrm{O}: 16, \mathrm{Br}: 80, \mathrm{~N}: 14, \mathrm{P}: 31$ )

Given below are two statements : Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes. Statement II : Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes. In the light of above statements, choose the Correct answer from the options given below

The number of optically active products obtained from the complete ozonolysis of the given compound is : 

Given below are two statements I and II. Statement I: Dumas method is used for estimation of "Nitrogen" in an organic compound. Statement II: Dumas method involves the formation of ammonium sulphate by heating the organic compound with conc $\mathrm{H}_2 \mathrm{SO}_4$. In the light of the above statements, choose the correct answer from the options given below

Consider the following sequence of reactions :  Molar mass of the product formed $(A)$ is _______ $\mathrm{g} \mathrm{mol}^{-1}$.

Identify the products $[A]$ and $[B]$, respectively in the following reaction : 

The molecular formula of benzene is:

Which one of the carbocations from the following is most stable?

The product \((\mathrm{P})\) formed in the following reaction is : 

Which of the following is the correct structure of L-fructose?

Given below are two statements: Statement I : Hyperconjugation is not a permanent effect. Statement II : In general, greater the number of alkyl groups attached to a positively charged C -atom, greater is the hyperconjugation interaction and stabilization of the cation. In the light of the above statements, choose the correct answer from the options given below

Match List - I with List - II.  Choose the correct answer from the options given below :

Aldol condensation is a popular and classical method to prepare $\alpha, \beta$-unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which one of the following is not a product of intramolecular aldol condensation?