Organic Chemistry PYQ — Page 28

Which of the following compounds would give the following set of qualitative analysis? (i) Fehling’s Test: Positive (ii) $\mathrm{Na}$ fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not prussian blue.

The descending order of acidity for the following carboxylic acid is- (A) ${\mathrm{CH}}_{3}\mathrm{COOH}$ (B) ${F}_{3}C-\mathrm{COOH}$ (C) ${\mathrm{ClCH}}_{2}-\mathrm{COOH}$ (D) ${\mathrm{FCH}}_{2}-\mathrm{COOH}$ (E) ${\mathrm{BrCH}}_{2}-\mathrm{COOH}$ Choose the correct answer from the options given below:

Match List I with List II<table class="pyq-table"><tbody><tr><td></td><td>List I Natural amino acid</td><td></td><td>List II One Letter Code</td></tr><tr><td>(A)</td><td>Glutamic acid</td><td>(I)</td><td>$Q$</td></tr><tr><td>(B)</td><td>Glutamine</td><td>(II)</td><td>$W$</td></tr><tr><td>(C)</td><td>Tyrosine</td><td>(III)</td><td>$E$</td></tr><tr><td>(D)</td><td>Tryptophan</td><td>(IV)</td><td>$Y$</td></tr></tbody></table> Choose the correct answer from the options given below:

The functional group in aldehydes is

Match List I with List II. <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List I</td><td colspan="2" rowspan="1">List II</td></tr><tr><td colspan="2" rowspan="1">Reaction</td><td colspan="2" rowspan="1">Reagents</td></tr><tr><td>(A)</td><td>Hoffmann Degradation</td><td>(I)</td><td>Conc.$\mathrm{KOH},\Delta$</td></tr><tr><td>(B)</td><td>Clemmensen reduction</td><td>(II)</td><td>${\mathrm{CHCl}}_{3},\mathrm{NaOH}/{H}_{3}{O}^{+}$</td></tr><tr><td>(C)</td><td>Cannizzaro reaction</td><td>(III)</td><td>${\mathrm{Br}}_{2},\mathrm{NaOH}$</td></tr><tr><td>(D)</td><td>Reimer-Tiemann reaction</td><td>(IV)</td><td>$\mathrm{Zn}-\mathrm{Hg}/\mathrm{HCl}$</td></tr></tbody></table>

The major product ‘$P$’ formed in the following sequence of reactions is 

The major product formed in the following reaction is 

The number of possible isomeric products formed when $3$-chloro-$1$-butene reacts with $\mathrm{HCl}$ through carbocation formation is.........

Match List I and List II <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List I Vitamin</td><td colspan="2" rowspan="1">List II Deficiency disease</td></tr><tr><td>$A$</td><td>Vitamin A</td><td>$I$</td><td>Beri-Beri</td></tr><tr><td>$B$</td><td>Thiamine</td><td>$\mathrm{II}$</td><td>Cheilosis</td></tr><tr><td>$C$</td><td>Ascorbic acid</td><td>$\mathrm{III}$</td><td>Xerophthalmia</td></tr><tr><td>$D$</td><td>Riboflavin</td><td>$\mathrm{IV}$</td><td>Scurvy</td></tr></tbody></table>Choose the correct answer from the options given below

Identify the correct order for the given property for following compounds  Choose the correct answer from the option given below :-

$2-$Methyl propyl bromide reacts with ${C}_{2}{H}_{5}{O}^{-}$and gives $‘A’$ whereas on reaction with ${C}_{2}{H}_{5}\mathrm{OH}$ it gives $‘B’.$ The mechanism followed in these reactions and the products $‘A’$ and $‘B’$ respectively are:

Incorrect method of preparation for alcohols from the following is:

Three organic compounds $A,B$ and $C$ were allowed to run in thin layer chromatography using hexane and gave the following result (see figure). The ${R}_{f}$ value of the most polar compound is _____ $\times {10}^{–2}$ 

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): $\alpha$-halocarboxylic acid on reaction with dil. ${\mathrm{NH}}_{3}$ gives good yield of $\alpha$-amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides. Reason (R): Amino acids exist in zwitter ion form in aqueous medium. In the light of the above statements, choose the correct answer from the options given below :

 In the above reaction, left hand side and right hand side rings are named as $‘A’$ and $‘B’$ respectively. They undergo ring expansion. The correct statement for this process is:

An athlete is given $100g$ of glucose $({C}_{6}{H}_{12}{O}_{6})$ for energy. This is equivalent to $1800\mathrm{kJ}$ of energy. The $50%$ of this energy gained is utilized by the athlete for sports activities at the event. In order to avoid storage of energy, the weight of extra water he would need to perspire is $_____g$ (Nearest integer) Assume that there is no other way of consuming stored energy. Given : The enthalpy of evaporation of water is $45\mathrm{kJ}{\mathrm{mol}}^{-1}$ Molar mass of $C,H&O$ are $12.1$ and $16g{\mathrm{mol}}^{-1}$.

Following chromatogram was developed by adsorption of compound '$A$' on a $6\mathrm{cm}$ TLC glass plate. Retardation factor of the compound '$A$' is _____ $\times {10}^{-1}$. 

Given below are two statements : Statement I : Pure Aniline and other arylamines are usually colourless. Statement II : Arylamines get coloured on storage due to atmospheric reduction. In the light of the above statements, choose the most appropriate answer from the options given below :

 Compound $P$ is neutral, $Q$ gives effervescence with ${\mathrm{NaHCO}}_{3}$ while $R$ reacts with Hinsberg’s reagent to give solid soluble in $\mathrm{NaOH}.$ Compound $P$ is

'$R$' formed in the following sequence of reaction is: 

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

Sulphur (S) containing amino acids from the following are: (a) isoleucine (b) cysteine (c) lysine (d) methionine (e) glutamic acid

When $0.01\mathrm{mol}$ of an organic compound containing $60%$ carbon was burnt completely, $4.4g$ of ${\mathrm{CO}}_{2}$ was produced. The molar mass of compound is _____ ${\mathrm{gmol}}^{-1}$ (Nearest integer)

Match List I with List II: <table class="pyq-table"><tbody><tr><td></td><td>List I (Mixture)</td><td></td><td>List II (Separation Technique)</td></tr><tr><td>(A)</td><td>${\mathrm{CHCl}}_{3}+{C}_{6}{H}_{5}{\mathrm{NH}}_{2}$</td><td>I</td><td>Steam distillation</td></tr><tr><td>(B)</td><td>${C}_{6}{H}_{14}+{C}_{5}{H}_{12}$</td><td>II</td><td>Differential extraction</td></tr><tr><td>(C)</td><td>${C}_{6}{H}_{5}{\mathrm{NH}}_{2}+{H}_{2}O$</td><td>III</td><td>Distillation</td></tr><tr><td>(D)</td><td>Organic compound in ${H}_{2}O$</td><td>IV</td><td>Fractional distillation</td></tr></tbody></table>