Organic Chemistry PYQ — Page 43

Which of the following is NOT an example of fibrous protein ?

Which one of the following compounds will give orange precipitate when treated with $2,4-$dinitrophenyl hydrazine ?

Given below are two statements : Statement I : Ethyl pent-$4$-yn-oate on reaction with ${\mathrm{CH}}_{3}\mathrm{MgBr}$ gives a $3^{\circ}$-alcohol. Statement II : In this reaction one mole of ethyl pent-$4$-yn-oate utilizes two moles of ${\mathrm{CH}}_{3}\mathrm{MgBr}$. In the light of the above statements, choose the most appropriate answer from the options given below :

 The compound $'A'$ is a complementary base of .......... in $\mathrm{DNA}$ strands.

In the following sequence of reactions, ${C}_{3}{H}_{6}\overset{{H}^{+}/{H}_{2}O}{\longrightarrow }A\frac{\mathrm{KIO}}{\mathrm{dilKOH}}B+C$. The compounds $B$ and $C$ respectively are :

 The Major Product in the above reaction is :

In the reaction of hypobromite with amide, the carbonyl carbon is lost as:

 The correct order of their reactivity towards hydrolysis at room temperature is:

 Consider the above reaction, the Product "P" is :

Which of the following is not a correct statement for primary aliphatic amines?

 Consider the above reaction sequence, Product "A" and Product "B" formed respectively are:

In the following sequence of reactions the $P$ is: 

The correct structures of A and B formed in the following reactions are : 

Choose the correct statement regarding the formation of carbocations A and B given :- 

Identify correct $A,B$ and $C$ in the reaction sequence given below : 

 Which of the following reagent is suitable for the preparation of the product in the above reaction?

Which of the following reaction/s will not give $p$ -aminoazobenzene? 

In chromatography technique, the purification of a compound is independent of:

Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide ?

The major product of the following reaction is: 

$2,4-\mathrm{DNP}$ test can be used to identify :

The correct decreasing order of densities of the following compounds is : 

 The structure of $X$ is:

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 :