Organic Chemistry PYQ — Page 39

The conversion of propan-$1$-ol to n-butylamine involves the sequential addition of reagents. The correct sequential order of reagents is

Which one of the following techniques is not used to spot components of a mixture separated on thin layer chromatographic plate?

The structure of protein that is unaffected by heating is :

In Carius method of estimation of halogen. $0.45g$ of an organic compound gave $0.36g$ of $\mathrm{AgBr}$. Find out the percentage of bromine in the compound. (Molar masses : $\mathrm{AgBr}=188g{\mathrm{mol}}^{-1}:\mathrm{Br}=80g{\mathrm{mol}}^{-1}$)

For the below given cyclic hemiacetal $(X)$, the correct pyranose structure is 

Major product of the following reaction is 

 Consider the above reaction and predict the major product.

A compound '$X$' is acidic and it is soluble in $\mathrm{NaOH}$ solution, but insoluble in ${\mathrm{NaHCO}}_{3}$ solution. Compound '$X$' also gives violet colour with neutral ${\mathrm{FeCl}}_{3}$ solution. The compound '$X$' is

Decarboxylation of all six possible forms of diaminobenzoic acids ${C}_{6}{H}_{3}{({\mathrm{NH}}_{2})}_{2}\mathrm{COOH}$ yields three products $A,B$ and $C$. Three acids give a product '$A$', two acids gives a product '$B$' and one acid give a product '$C$'. The melting point of product '$C$' is

Compound '$A$' undergoes following sequence of reactions to give compound '$B$'. The correct structure and chirality of compound '$B$' is [where $\mathrm{Et}$ is $-{C}_{2}{H}_{5}$]  Compound '$A$'

In Friedel-Crafts alkylation of aniline, one gets:

Given below are two statements. Statement I : The compound  is optically active. Statement II :  is mirror image of above compound $A$. In the light of the above statement, choose the most appropriate answer from the options given below.

 In the above reaction product $B$ is

Which of the following is not an example of benzenoid compound?

Number of electrophillic centres in the given compound is___ 

In the estimation of bromine, $0.5g$ of an organic compound gave $0.40g$ of silver bromide. The percentage of bromine in the given compound is $%$ (nearest integer) (Relative atomic masses of $\mathrm{Ag}$ and $\mathrm{Br}$ are $108u$ and $80u$, respectively).

In the following reaction :  The compounds $A$ and $B$ respectively are

Identify the correct statement for the below given transformation. 

 In the above reactions, product A and product B respectively are:

 Correct statement about the given chemical reaction is

Excess of isobutane on reaction with ${\mathrm{Br}}_{2}$ in presence of light at $125^{\circ}C$ gives which one of the following, as the major product?

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Assertion (A): A simple distillation can be used to separate a mixture of propanol and propanone. Reason (R): Two liquids with a difference of more than $20^{\circ}C$ in their boiling points can be separated by simple distillations. In the light of the above statements, choose the most appropriate answer from the options given below :

 The structure of $X$ is:

The major product of the following reaction is: