Organic Chemistry PYQ — Page 25

Decreasing order of reactivity towards electrophilic substitution for the following compounds is: 

Compound that will give positive Lassaigne's test for both nitrogen and halogen is

The most stable carbocation for the following is: 

The number of molecules which gives haloform test among the following molecules is : 

In a reaction  reagents ‘$X$’ and ‘$Y$’ respectively are:

When a hydrocarbon $A$ undergoes combustion in the presence of air, it requires $9.5$ equivalents of oxygen and produces $3$ equivalents of water. What is the molecular formula of $A$?

In the cumene to phenol preparation in presence of air, the intermediate is

A protein ‘$X$’ with molecular weight of $70,000u$, on hydrolysis gives amino acids. One of these amino acid is

The mass of ${\mathrm{NH}}_{3}$ produced when $131.8\mathrm{kg}$ of cyclohexane carbaldehyde undergoes Tollen’s test is _____ $\mathrm{kg}$. (Nearest Integer) Molar mass of $C=12g/\mathrm{mol}$ $N=14g/\mathrm{mol}$ $O=16g/\mathrm{mol}$

Arrange the following compounds in increasing order of rate of aromatic electrophilic substitution reaction. 

 The number of hyperconjugation structures involved to stabilize carbocation formed in the above reaction is __________.

Number of isomeric aromatic amines with molecular formula ${C}_{8}{H}_{11}N$, which can be synthesized by Gabriel Phthalimide synthesis is _____.

Molar mass of the hydrocarbon (X) which on ozonolysis consumes one mole of ${O}_{3}$ per mole of (X) and gives one mole each of ethanal and propanone is ______ g mol$^{–1}$ (Molar mass of C : 12 g mol$^{–1}$ , H : 1 g mol$^{–1}$ )

The compound which will have the lowest rate towards nucleophilic aromatic substitution on treatment with ${\mathrm{OH}}^{–}$ is

The total number of chiral compound/s from the following is 

A hydrocarbon 'X' with formula ${C}_{6}{H}_{8}$ uses two moles of ${H}_{2}$ on catalystic hydrogenation of its one mole. On ozonolysis, 'X' yields two moles of methane dicarbaldehyde. The hydrocarbon 'X' is :

Compoun $'B'$ is 

In an oligopeptide named Alanylglycylphenyl alanyl isoleucine, the number of ${\mathrm{sp}}^{2}$ hybridised carbons is _____.

Which is not true for arginine?

Decreasing order towards ${S}_{N}1$ reaction for the following compounds is: 

Match items of Row I with those of Row II. Row I: (P)  (Q)  (R)  (S)  Row II: (i) $\alpha ‐D‐(—)$ Fructofuranose. (ii) $\beta ‐D‐(—)$ Fructofuranose. (iii) $\alpha ‐D‐(‐)$ Glucopyranose. (iv) $\beta ‐D‐(‐)$ Glucopyranose. Correct match is

Given below are two statements, one is labelled as Assertion $A$ and the other is labelled as Reason $R$. Assertion $A$: can be subjected to Wolff-Kishner reduction to give  Reason $R$: Wolff-Kishner reduction is used to convert  into  In the light of the above statements, choose the correct answer from the options given below:

The correct IUPAC nomenclature for the following compound is: 

From the figure of column chromatography given below, identify incorrect statements.  $A$. Compound ‘$c$’ is more polar than ‘$a$’ and ‘$b$’ $B$. Compound ‘$a$’ is least polar $C$. Compound ‘$b$’ comes out of the column before ‘$c$’ and after ‘$a$’ $D$. Compound ‘$a$’ spends more time in the column Choose the correct answer from the options given below