Organic Chemistry PYQ — Page 13

Match the LIST-I with LIST-II  Choose the correct answer from the options given below:

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ? (A) $\mathrm{R}-\mathrm{C} \equiv \mathrm{N} \xrightarrow[\text { mild condition }]{\text { (i) } \mathrm{H}^{+} / \mathrm{H}_2 \mathrm{O}}$ (B) $\mathrm{R}-\mathrm{MgX} \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{CO}_2}$ (C) $\mathrm{R}-\mathrm{C} \equiv \mathrm{N} \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{SnCl}_2 / \mathrm{HCl}}$ (D) $\mathrm{R} \cdot \mathrm{CH}_2 \cdot \mathrm{OH} \xrightarrow{\mathrm{PCC}}$ (E) Choose the correct answer from the options given below:

Given below are two statements : Statement (I) : Alcohols are formed when alkyl chlorides are treated with aqueous potassium hydroxide by elimination reaction. Statement (II) : In alcoholic potassium hydroxide, alkyl chlorides form alkenes by abstracting the hydrogen from the $\beta$-carbon. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements:   involving lone pair of electrons on nitrogen. In the light of the above statements, choose the most appropriate answer from the options given below

The products $A$ and $B$ in the following reactions, respectively are $\mathrm{A} \stackrel{\mathrm{Ag}-\mathrm{NO}_2}{\longleftrightarrow} \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br} \xrightarrow{\mathrm{AgCN}} \mathrm{B}$

When sec-butylcyclohexane reacts with bromine in the presence of sunlight, the major product is :

Given below are two statements: Statement I : D-(+)-glucose $+\mathrm{D}-(+)$ fructose $\xrightarrow{-\mathrm{H}_2 \mathrm{O}}$ sucrose Statement II : Invert sugar is formed during sucrose hydrolysis. In the light of the above statements, choose the correct answer from the options given below -

Given below are some nitrogen containing compounds  Each of them is treated with HCl separately. 1.0 g of the most basic compound will consume _______ mg of HCl. (Given molar mass in \(\mathrm{g} \mathrm{mol}^{-1} \mathrm{C}: 12, \mathrm{H}: 1, \mathrm{O}: 16, \mathrm{Cl}: 35.5\))

A toxic compound " A " when reacted with NaCN in aqueous acidic medium yields an edible cooking component and food preservative ' $B$ '. " $B$ " is converted to "C" by diborane and can be used as an additive to petrol to reduce emission. "C" upon reaction with oleum at $140^{\circ} \mathrm{C}$ yields an inhalable anesthetic "D". Identify "A", "B", "C" and "D", respectively.

What amount of bromine will be required to convert 2 g of phenol into 2,4,6-tribromophenol? (Given molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ of $\mathrm{C}, \mathrm{H}, \mathrm{O}, \mathrm{Br}$ are $12,1,16,80$ respectively )


Consider the following molecules :  The correct order of rate of hydrolysis is :

The least acidic compund, among the following is : 

Consider the following sequence of reactions.  Total number of $\mathrm{sp}^3$ hybridised carbon atoms in the major product C formed is________

$\mathrm{A} \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{NaOH}} \mathrm{B} \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{SO}_4, \Delta]{\text { (i) } \mathrm{EtOH}} \mathrm{C}$ ' A ' shows positive Lassaign's test for N and its molar mass is 121. ' B ' gives effervescence with aq. $\mathrm{NaHCO}_3$. 'C' gives fruity smell. Identify $\mathrm{A}, \mathrm{B}$ and C from the following.

A dipeptide, " $x$ " on complete hydrolysis gives " $y$ " and " $z$ ". " $y$ " on treatment with aq. $\mathrm{HNO}_2$ produces lactic acid. On the other hand " $z$ " on heating gives the following cyclic molecule.  Based on the information given, the dipeptide X is:

A tetrapeptide " $x$ " on complete hydrolysis produced glycine (Gly), alanine (Ala), valine (Val), leucine (Leu) in equimolar proportion each. The number of tetrapeptides (sequences) possible involving each of these amino acids is

Identify the correct statement among the following:

Given below are two statements: Statement I : D-glucose pentaacetate reacts with 2, 4-dinitrophenylhydrazine Statement II : Starch, on heating with concentrated sulfuric acid at $100^{\circ} \mathrm{C}$ and 2-3 atmosphere pressure produces glucose. In the light of the above statements, choose the correct answer from the options given below

Thyroxine, the hormone has given below structure  The percentage of iodine in thyroxine is ____ $\%$. (nearest integer) (Given molar mass in $\mathrm{g} \mathrm{mol}^{-1} \mathrm{C}: 12. \mathrm{H}: 1, \mathrm{O}: 16$, $\mathrm{N}: 14, \mathrm{I}: 127)$

During estimation of nitrogen by Dumas' method of compound $\mathrm{X}(0.42 \mathrm{~g})$ :  _____ mL of $\mathrm{N}_2$ gas will be liberated at STP. (nearest integer) (Given molar mass in $\mathrm{g} \mathrm{mol}^{-1}: \mathrm{C}: 12, \mathrm{H}: 1$, $\mathrm{N}: 14)$

The structure of the major product formed in the following reaction is : 

In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm Hg pressure. The percentage composition of nitrogen in the compound (Aqueous tension at $300 \mathrm{~K}=15 \mathrm{~mm} \mathrm{Hg})$ is

Mixture of 1 g each of chlorobenzene, aniline and benzoic acid is dissolved in 50 mL ethyl acetate and placed in a separating funnel, 5 M NaOH ( 30 mL) was added in the same funnel. The funnel was shaken vigorously and then kept aside. The ethyl acetate layer in the funnel contains :