Organic Chemistry PYQ — Page 23

Identify structure of $2,3$-dibromo-$1$-phenylpentane.

 Consider the above chemical reaction. Product " \(\mathrm{A}\) " is :

Cyclohexene  is _________ type of an organic compound.

The major product(P) in the following reaction is 

Given below are two statements: Statement (I) : The ${\mathrm{NH}}_{2}$ group in Aniline is ortho and para directing and a powerful activating group. Statement (II) : Aniline does not undergo FriedelCraft's reaction (alkylation and acylation). In the light of the above statements, choose the most appropriate answer from the options given below:

$2-\mathrm{chlorobutane}+{\mathrm{Cl}}_{2}\rightarrow {C}_{4}{H}_{8}{\mathrm{Cl}}_{2}$ (isomers) Total number of optically active isomers shown by ${C}_{4}{H}_{8}{\mathrm{Cl}}_{2}$, obtained in the above reaction is ________.

Number of compounds which give reaction with Hinsberg's reagent is _________. 

Total number of stereo isomers possible for the given structure : 

The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is:

Which of the following molecule/species is most stable?

Match List I with List II <table class="pyq-table"><tbody><tr><td></td><td>LIST I (Technique)</td><td></td><td>LIST II (Application)</td></tr><tr><td>A.</td><td>Distillation</td><td>I.</td><td>Separation of glycerol from spent-lye</td></tr><tr><td>B.</td><td>Fractional distillation</td><td>II.</td><td>Aniline - Water mixture</td></tr><tr><td>C.</td><td>Steam distillation</td><td>III.</td><td>Separation of crude oil fractions</td></tr><tr><td>D.</td><td>Distillation under reduced pressure</td><td>IV.</td><td>Chloroform-Aniline</td></tr></tbody></table>Choose the correct answer from the options given below:

The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in the vapour phase. A suitable method for the extraction of these oils from the flowers is:

In the given compound, the number of \(2^{\circ}\) carbon atom \(/ \mathrm{s}\) is _______. 

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 _______

From the vitamins $A,{B}_{1},{B}_{6},{B}_{12},C,D,E$ and $K$, the number vitamins that can be stored in our body is ______.

According to IUPAC system, the compound  is named as:

The correct stability order of the following resonance structures of \(\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}\) is 

Among the given organic compounds, the total number of aromatic compounds is 

Identify product A and product B 

Which of the following reaction is correct?

Identify the product A and product B in the following set of reactions. 

Number of alkanes obtained on electrolysis of a mixture of ${\mathrm{CH}}_{3}\mathrm{COONa}$ and ${C}_{2}{H}_{5}\mathrm{COONa}$ is_____.

Highest enol content will be shown by :

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