JEE Main 2021 — Organic Chemistry

A chloro compound "A". (i) forms aldehydes on ozonolysis followed by the hydrolysis. (ii) when vaporized completely $1.53g$ of $A$, gives $448\mathrm{mL}$ of vapour at STP. The number of carbon atoms in a molecule of compound $A$ is

A non-reducing sugar $A$ hydrolyses to give two reducing mono saccharides. Sugar $A$ is

A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have _____ peptide linkages.

A. Phenyl methanamine B. $N,N$-Dimethylaniline C. $N$-Methyl aniline D. Benzenamine Choose the correct order of basic nature of the above amines.

A reaction of 0.1 mole of Benzylamine with bromomethane gave $23g$ of Benzyl trimethyl ammonium bromide. The number of moles of bromomethane consumed in this reaction are $n\times {10}^{-1},$ when $n=$_____ (Round off to the Nearest Integer). $(\text{Given : Atomic masses}:C:12.0u,H:1.0u,N:14.0u,\mathrm{Br}:80.0u)$

A reaction of benzonitrile with one equivalent ${\mathrm{CH}}_{3}\mathrm{MgBr}$ followed by hydrolysis produces a yellow liquid "P". The compound "P" will give positive ________

Ammonolysis of Alkyl halides followed by the treatment with $\mathrm{NaOH}$ solution can be used to prepare primary, secondary and tertiary amines. The purpose of $\mathrm{NaOH}$ in the reaction is.

Among the following compounds $I-\mathrm{IV},$ which one forms a yellow precipitate on reacting sequentially with (i) $\mathrm{NaOH}$ (ii) dil. ${\mathrm{HNO}}_{3}$ (iii) ${\mathrm{AgNO}}_{3}?$ 

Among the following, the aromatic compounds are :  Choose the correct answer from the following options :

An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by ammonolysis of ethyl chloride. The correct structure of amine is:

An organic compound $A({C}_{6}{H}_{6}O)$ gives dark green colouration with ferric chloride. On treatment with ${\mathrm{CHCl}}_{3}$ and $\mathrm{KOH},$ followed by acidification gives compound $B.$ Compound $B$ can also be obtained from compound $C$ on reaction with pyridinium chlorochromate (PCC). Identify $A,B$ and $C.$

An organic compound is subjected to chlorination to get compound $A$ using $5.0g$ of chlorine. When $0.5g$ of compound $A$ is reacted with ${\mathrm{AgNO}}_{3}$ [Carius Method], the percentage of chlorine in compound $A$ is when it forms $0.3849g$ of $\mathrm{AgCl}.$ (Round off to the Nearest Integer) (Atomic masses of $\mathrm{Ag}$ and $\mathrm{Cl}$ are $107.87$ and $35.5$ respectively)

An organic compound $A$ on treatment with benzene sulfonyl chloride gives compound $B$. $B$ is soluble in dil. $\mathrm{NaOH}$ solution. Compound $A$ is :

An organic compound '$A$' ${C}_{4}{H}_{8}$on treatment with ${\mathrm{KMnO}}_{4}/{H}^{+}$ yields compound '$B$' ${C}_{3}{H}_{6}O$. Compound '$A$' also yields compound '$B$' an ozonolysis. Compound '$A$' is :

An unsaturated hydrocarbon $X$ on ozonolysis gives $A$. Compound $A$ when warmed with ammoniacal silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon $X$ is :

$A$ and $B$ in the following reactions are: 

Arrange the following conformational isomers of n-butane in order of their increasing potential energy: 

Assertion A : Enol form of acetone $[{\mathrm{CH}}_{3}{\mathrm{COCH}}_{3}]$ exists in $<0.1%$ quantity. However, the enol form of acetyl acetone $[{\mathrm{CH}}_{3}{\mathrm{COCH}}_{2}{\mathrm{OCCH}}_{3}]$ exists in approximately $15%$quantity. Reason R : enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone. Choose the correct statement:

Benzene reacts with chlorine in the presence of FeCl₃ to give:

Benzene on nitration gives nitrobenzene in presence of ${\mathrm{HNO}}_{3}$ and ${H}_{2}{\mathrm{SO}}_{4}$ mixture, where:

Carbylamine test is used to detect the presence of primary amino group in an organic compound. Which of the following compound is formed when this test is performed with aniline?

Ceric ammonium nitrate and ${\mathrm{CHCl}}_{3}/\mathrm{alc}$. $\mathrm{KOH}$ are used for the identification of functional groups present in _ and _ respectively.

Choose the correct name for compound given below : 

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

Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :

Compound $A$ is converted to $B$ on reaction with ${\mathrm{CHCl}}_{3}$ and $\mathrm{KOH}$. The compound $B$ is toxic and can be decomposed by $C.A,B$ and $C$ respectively are:

Compound with molecular formula ${C}_{3}{H}_{6}O$ can show:

Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are : 

$R-\mathrm{CN}\frac{(i)\mathrm{DIBAL}-H}{(\mathrm{ii}){H}_{2}O}\longrightarrow R-Y$ Consider the above reaction and identify "Y"

Consider the following chemical reaction. $\mathrm{CH}\equiv \mathrm{CH}\frac{1)\mathrm{Red}\mathrm{hot}\mathrm{Fe}\mathrm{tube},873K}{2)\mathrm{CO},\mathrm{HCl},{\mathrm{AlCl}}_{3}}>\mathrm{Product}$ The number of ${\mathrm{sp}}^{2}$ hybridized carbon atom(s) present in the product is

Deficiency of vitamin K causes :

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?

Experimentally reducing a functional group cannot be done by which one of the following reagents ?

For the following sequence of reactions, the correct products are : 

For the given reaction:  What is $A$?

For the given reaction:  What is $A$?

For the reaction given below :  The compound which is not formed as a product in the reaction is a :

Fructose is an example of :-

Given below are two statements : $\mathrm{Statement}I:$ Aniline is less basic than acetamide. $\mathrm{Statement}\mathrm{II}:$ In aniline, the lone pair of electrons on nitrogen atom is delocalised over benzene ring due to resonance and hence less available to a proton. Choose the most appropriate option ;

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of ${\mathrm{Al}}_{2}{O}_{3}$ with cryolite. Reason (R) : The oxidation state of $\mathrm{Al}$ in cryolite is $+3.$ In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis. Reason (R): Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether. In the light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar. Reason (R): Sucrose involves glycosidic linkage between ${C}_{1}$ of $\beta$-glucose and ${C}_{2}$ of $\alpha$-fructose. Choose the most appropriate answer from the options given below :

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 :

Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (R) : Gabriel phthalimide synthesis cannot be used to prepare aromatic primary amines. Reason : Aryl halides do not undergo nucleophilic substitution reaction. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements: Statement $I$: A mixture of chloroform and aniline can be separated by simple distillation. Statement $\mathrm{II}$: When separating aniline from a mixture of aniline and water by steam distillation aniline boils below its boiling point. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: Statement-I : $2$ -methylbutane on oxidation with ${\mathrm{KMnO}}_{4}$ gives $2$ -methylbutan-$2$-ol. Statement-II : $n$ -alkanes can be easily oxidised to corresponding alcohol with ${\mathrm{KMnO}}_{4}$. Choose the correct option :

Given below are two statements : Statement I : ${C}_{2}{H}_{5}\mathrm{OH}$ and $\mathrm{AgCN}$ both can generate nucleophile. Statement II : $\mathrm{KCN}$ and $\mathrm{AgCN}$ both will generate nitrile nucleophile with all reaction conditions. Choose the most appropriate option :

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 :

Given below are two statements : Statement I : Hyperconjugation is a permanent effect. Statement II : Hyperconjugation in ethyl cation $({\mathrm{CH}}_{3}-\overset{+}{C}{H}_{2})$ involves the overlapping of ${C}_{{\mathrm{sp}}^{2}}-{H}_{1s}$ bond with empty $2p$ orbital of other carbon. Choose the correct option:

Given below are two statements: Statement-I: Retardation factor $({R}_{f})$ can be measured in meter/centimetre. Statement-II: ${R}_{f}$ value of a compound remains constant in all solvents. Choose the most appropriate answer from the options given below:

Given below are two statements : Statement I : The process of producing syn-gas is called gasification of coal. Statement II : The composition of syn-gas is $\mathrm{CO}+{\mathrm{CO}}_{2}+{H}_{2}(1:1:1).$ In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : Statement $I$ : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion. Statement $\mathrm{II}$ : The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product. In the light of the above statements, choose the most appropriate answer from the options given below :

Hoffmann bromamide degradation of benzamide gives product $A,$ which upon heating with ${\mathrm{CHCl}}_{3}$ and $\mathrm{NaOH}$ gives product $B.$ The structures of $A$ and $B$ are:

Hydrolysis of sucrose gives:

Identify $A$ and $B$ in the chemical reaction. 

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

Identify $A$ in the following chemical reaction. 

Identify $A$ in the following reaction. 

Identify $A$ in the given chemical reaction. 

Identify $A$ in the given chemical reaction. 

Identify $A$ in the given reaction. 

Identify products $A$ and $B.$ 

Identify the incorrect statement from the following.

Identify the major products $A$ and $B$ respectively in the following reactions of phenol 

In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of:

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

In Duma's method of estimation of nitrogen, $0.1840g$ of an organic compound gave $30\mathrm{mL}$ of nitrogen collected at $287K$ and $758\mathrm{mm}$ of $\mathrm{Hg}$ pressure. The percentage composition of nitrogen in the compound is ______. (Round off to the Nearest Integer). [Given : Aqueous tension at $287K=14\mathrm{mm}$ of $\mathrm{Hg}$]

In $\overset{1}{C}{H}_{2}=\overset{2}{C}=\overset{3}{C}H-\overset{4}{C}{H}_{3}$ molecule, the hybridization of carbon $1,2,3$ and $4$ respectively, are :

In the following molecules,  Hybridisation of carbon $a,b$ and $c$ respectively are :

In the following reaction, the reason why meta-nitro product also formed is: 

In the following sequence of reactions a compound $A,$ (molecular formula ${C}_{6}{H}_{12}{O}_{2}$ ) with a straight chain structure gives a ${C}_{4}$ carboxylic acid. $A$ is : $A\frac{{\mathrm{LiAlH}}_{4}}{{H}_{3}{O}^{+}}B\overset{\text{ Oxidation }}{\longrightarrow }{C}_{4}-$ carboxylic acid

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 :

In the following sequence of reactions, the final product $D$ is: 

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

In the given reaction $3-$Bromo$-2,2-$dimethyl butane $\overset{{C}_{2}{H}_{5}\mathrm{OH}}{\longrightarrow }\underset{\text{(Major Product)}}{'A'}$ Product $A$ is:

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

In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula ${[\mathrm{Ag}{({\mathrm{NH}}_{3})}_{2}]}^{+}$ per aldehyde group to form silver mirror is ___.(Round off to the Nearest integer)

 Consider the above reaction, the major product '$P$' is:

 Consider the above reaction and identify the Product $P$ :

 In the above reaction, the structural formula of (A), "X" and "Y" respectively are :

 The given reaction can occur in the presence of : (a) Bromine water (b) ${\mathrm{Br}}_{2}$ in ${\mathrm{CS}}_{2},273K$ (c) ${\mathrm{Br}}_{2}/{\mathrm{FeBr}}_{3}$ (d) ${\mathrm{Br}}_{2}$ in ${\mathrm{CHCl}}_{3},273K$ Choose the correct answer from the options given below:

 Considering the above chemical reaction, identify the product $X:$

 The above reaction requires which of the following reaction conditions?

 Consider the above reaction, the major product $P$ formed is :-

 The product "A" in the above reaction is:

 Considering the above reaction, the major product among the following is:

 Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

 Consider the above reaction, the product $X$ and $Y$ respectively are :

 Consider the given reaction, the product '$X$' is:

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

 The Major Product in the above reaction is :

 Consider the above chemical reaction and identify product $A$

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

 Considering the above reaction, $X$ and $Y$ respectively are:

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

 The structure of $X$ is:

 Consider the above reaction, compound B is:

 In the above chemical reaction, intermediate "$X$" and reagent/condition "$A$" are :

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

 In the above reactions, the enzyme $A$ and enzyme B respectively are :-

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

 In the above reaction, the reagent "$A$" is :

 Maleic anhydride Maleic anhydride can be prepared by :

 The product "$P$" in the above reaction is :

 The correct order of stability of given carbocation is:

 Among the given species the Resonance stabilised carbocations are:

 Consider the given reaction, the Product $A$ is:

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

 Identify the reagent(s) '$A$' and condition(s) for the reaction :

 For above chemical reactions, identify the correct statement from the following:

 Major product P of above reaction, is:


 In the chemical reactions given above $A$ and $B$ respectively are :

 Consider the given reaction, percentage yield of :

 The product "$A$" and "$B$" formed in above reactions are

 Consider the above chemical reaction. The total number of stereoisomers possible for Product "P" is _________

 consider the above reaction, and choose the correct statement:

 Correct statement about the given chemical reaction is

 Consider the given reaction, Identify ${X'}^{'}$ and ${Y'}^{'}$ :

Main Products formed during a reaction of $1$-methoxy naphthalene with hydroiodic acid are:

Match List - I with List - II :<table class="pyq-table"><tbody><tr><td></td><td>List - I (Metal ion)</td><td></td><td>List - II (Group in Qualitative analysis)</td></tr><tr><td>(a)</td><td>${\mathrm{Mn}}^{2+}$</td><td>(i)</td><td>Group - III</td></tr><tr><td>(b)</td><td>${\mathrm{As}}^{3+}$</td><td>(ii)</td><td>Group - IIA</td></tr><tr><td>(c)</td><td>${\mathrm{Cu}}^{2+}$</td><td>(iii)</td><td>Group - IV</td></tr><tr><td>(d)</td><td>${\mathrm{Al}}^{3+}$</td><td>(iv)</td><td>Group - IIB</td></tr></tbody></table>Choose the most appropriate answer from the options given below :

Match List - I with List - II. <table class="pyq-table"><tbody><tr><td></td><td>List - I (Chemical Reaction)</td><td></td><td>List - II (Reagent used)</td></tr><tr><td>a</td><td>${\mathrm{CH}}_{3}{\mathrm{COOCH}}_{2}{\mathrm{CH}}_{3}\rightarrow {\mathrm{CH}}_{3}{\mathrm{CH}}_{2}\mathrm{OH}$</td><td>i</td><td>${\mathrm{CH}}_{3}\mathrm{MgBr}/{H}_{3}{O}^{+}$ (one equivalent)</td></tr><tr><td>b</td><td>${\mathrm{CH}}_{3}{\mathrm{COOCH}}_{3}\rightarrow {\mathrm{CH}}_{3}\mathrm{CHO}$</td><td>ii</td><td>${H}_{2}{\mathrm{SO}}_{4}/{H}_{2}O$</td></tr><tr><td>c</td><td>${\mathrm{CH}}_{3}C\equiv N\rightarrow {\mathrm{CH}}_{3}\mathrm{CHO}$</td><td>iii</td><td>$\mathrm{DIBAL}-H/{H}_{2}O$</td></tr><tr><td>d</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Carboxylic_Acid_Derivatives/648b5a6b417cc3fb48d6742a/question_1__q_648b5a6b417cc3fb48d6742a__cdn-question-pool.getmarks.app__ecb288d8-1f93-45c7-a4cf-d323dfa28a37-image__22aa15a4d6_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Carboxylic Acid Derivatives — question figure"></td><td>iv</td><td>${\mathrm{SnCl}}_{2},\mathrm{HCl}/{H}_{2}O$</td></tr></tbody></table>Choose the most appropriate match.

Match List - I with List - II.<table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List-I (Salt)</td><td colspan="2" rowspan="1">List-II (Flame colour wavelength)</td></tr><tr><td>(a)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/648b5a6a417cc3fb48d67218/question_1__q_648b5a6a417cc3fb48d67218__cdn-question-pool.getmarks.app__0217e565-ca29-4400-90db-6846af03ed46-image__778a74b7a7_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Amines — question figure 1"></td><td>(i)</td><td>${\mathrm{Br}}_{2}/\mathrm{NaOH}$</td></tr><tr><td>(b)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/648b5a6a417cc3fb48d67218/question_2__q_648b5a6a417cc3fb48d67218__cdn-question-pool.getmarks.app__08d4de91-2a2f-4c10-8e2b-200519a02c8b-image__ec4150aca5_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Amines — question figure 2"></td><td>(ii)</td><td>${H}_{2}/\mathrm{Pd}-{\mathrm{BaSO}}_{4}$</td></tr><tr><td>(c)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/648b5a6a417cc3fb48d67218/question_3__q_648b5a6a417cc3fb48d67218__cdn-question-pool.getmarks.app__10dcf030-7b0a-4369-bcd3-ee2434bc9ebb-image__01f6a5e148_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Amines — question figure 3"></td><td>(iii)</td><td>$\mathrm{Zn}(\mathrm{Hg})/\mathrm{Conc}.\mathrm{HCl}$</td></tr><tr><td>(d)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/648b5a6a417cc3fb48d67218/question_4__q_648b5a6a417cc3fb48d67218__cdn-question-pool.getmarks.app__fa1d2e93-87f7-4d63-915a-fd4ebb2a7ff9-image__1a5db1416e_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Amines — question figure 4"></td><td>(iv)</td><td>${\mathrm{Cl}}_{2}/\mathrm{Red}P,{H}_{2}O$</td></tr></tbody></table>Choose the correct answer from the options given below:

Match List-$I$ with List-$\mathrm{II}$. <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List-$I$</td><td colspan="2" rowspan="1">List-$\mathrm{II}$</td></tr><tr><td>(a)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Haloalkanes_and_Haloarenes/648b5a6b417cc3fb48d674df/question_1__q_648b5a6b417cc3fb48d674df__cdn-question-pool.getmarks.app__d25a9af9-a4b5-4899-81c1-56eef1eec907-image__aee5241e95_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Haloalkanes and Haloarenes — question figure 1"></td><td>(i)</td><td>Wurtz reaction</td></tr><tr><td>(b)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Haloalkanes_and_Haloarenes/648b5a6b417cc3fb48d674df/question_2__q_648b5a6b417cc3fb48d674df__cdn-question-pool.getmarks.app__e8fe2604-80bb-4611-a19e-3d75e4eaad8e-image__2c706b28d9_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Haloalkanes and Haloarenes — question figure 2"></td><td>(ii)</td><td>Sandmeyer reaction</td></tr><tr><td>(c)</td><td>$2{\mathrm{CH}}_{3}{\mathrm{CH}}_{2}\mathrm{Cl}+2\mathrm{Na}\overset{\mathrm{Ether}}{\longrightarrow }{C}_{2}{H}_{5}-{C}_{2}{H}_{5}+2\mathrm{NaCl}$</td><td>(iii)</td><td>Fittig reaction</td></tr><tr><td>(d)</td><td>$2{C}_{6}{H}_{5}\mathrm{Cl}+2\mathrm{Na}\overset{\mathrm{Ether}}{\longrightarrow }{C}_{6}{H}_{5}-{C}_{6}{H}_{5}+2\mathrm{NaCl}$</td><td>(iv)</td><td>Gatterman reaction</td></tr></tbody></table>Choose the correct answer from the options given below:

Match List-$I$ with List-$\mathrm{II}$. <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List-$I$</td><td colspan="2" rowspan="1">List-$\mathrm{II}$</td></tr><tr><td>(a)</td><td>Sucrose</td><td>(i)</td><td>$\beta -D-$Galactose and $\beta -D-$Glucose</td></tr><tr><td>(b)</td><td>Lactose</td><td>(ii)</td><td>$\alpha -D-$Glucose and $\beta -D-$Fructose</td></tr><tr><td>(c)</td><td>Maltose</td><td>(iii)</td><td>$\alpha -D-$Glucose and $\alpha -D-$Glucose</td></tr></tbody></table>Choose the correct answer from the options given below:

Match List$-I$ with List$-\mathrm{II}:$ <table class="pyq-table"><tbody><tr><td></td><td>List$-I$ (Chemicals)</td><td></td><td>List$-\mathrm{II}$ (Use / Preparation / Constituent)</td></tr><tr><td>(a)</td><td>Alcoholic potassium hydroxide</td><td>(i)</td><td>Electrodes in batteries</td></tr><tr><td>(b)</td><td>$\mathrm{Pd}/{\mathrm{BaSO}}_{4}$</td><td>(ii)</td><td>Obtained by addition reaction</td></tr><tr><td>(c)</td><td>$\mathrm{BHC}$ (Benzene hexachloride)</td><td>(iii)</td><td>Used for $\beta -$elimination reaction</td></tr><tr><td>(d)</td><td>Polyacetylene</td><td>(iv)</td><td>Lindlar's catalyst</td></tr></tbody></table>Choose the most appropriate match

Mesityl oxide is a common name of:

Nitrogen can be estimated by Kjeldahl's method for which of the following compound?

$0.8g$ of an organic compound was analysed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the compound was found to be $42%$, then....... $\mathrm{mL}$ of $1M$ ${H}_{2}{\mathrm{SO}}_{4}$ would have been neutralized by the ammonia evolved during the analysis.

Which of the following compounds will show optical isomerism?

Out of following isomeric forms of uracil, which one is present in RNA?

Out of the following, which type of interaction is responsible for the stabilisation of $\alpha -$helix structure of proteins?

Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction : $C{H}_{4}+{I}_{2}\rightleftharpoons _{\mathrm{Reversible}}^{\mathrm{hv}}{\mathrm{CH}}_{3}-I+\mathrm{HI}$

Primary, secondary and tertiary amines can be separated using:

Reaction of Grignard reagent, ${C}_{2}{H}_{5}\mathrm{MgBr}$ with ${C}_{8}{H}_{8}O$ followed by hydrolysis gives compound $A$, which reacts instantly with Lucas reagent to give compound $B({C}_{10}{H}_{13}\mathrm{Cl}).$ The Compound $B$ is:

$\underset{({C}_{4}{H}_{8}{\mathrm{Cl}}_{2})}{A}\rightarrow _{373K}^{\mathrm{Hydrolysis}}\underset{({C}_{4}{H}_{8}O)}{B}$ $B$ reacts with Hydroxyl amine but does not give Tollen's test. Identify $A$ and $B$.

Reagent, $1-$naphthylamine and sulphanilic acid in acetic acid is used for the detection of

Seliwanoff test and Xanthoproteic test are used for the identification of _ and _ respectively.

Staggered and eclipsed conformers of ethane are:

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

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

The correct options for the products $A$ and $B$ of the following reactions are: 

The correct order of acid character of the following compounds is :

The correct order of reactivity of the given chlorides with acetate in acetic acid is :

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is: 

The correct pair(s) of the ambident nucleophiles is (are): (A) $\mathrm{AgCN}/\mathrm{KCN}$ (B) $\mathrm{RCOOAg}/\mathrm{RCOOK}$ (C) ${\mathrm{AgNO}}_{2}/{\mathrm{KNO}}_{2}$ (D) $\mathrm{AgI}/\mathrm{KI}$

The correct sequence of correct reagents for the following transformation is :- 

The correct sequence of reagents used in the preparation of $4$ -bromo-$2$-nitroethylbenzene from benzene is :

The correct sequential addition of reagents in the preparation of $3-$nitrobenzoic acid from benzene is:

The correct structure of Ruhemann's Purple, the compound formed in the reaction of Ninhydrin with proteins is:

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

The diazonium salt of which of the following compounds will form a coloured dye on reaction with $\beta$-Naphthol in $\mathrm{NaOH}?$

The dihedral angle in staggered form of Newmann's projection of$1,1,1$-Trichloro ethane is $\ldots \ldots \ldots$degree. (Round off to the nearest integer) (Round off to the nearest integer)

The major product (A) formed in the reaction given below is : 

The major product formed in the following reaction is: 

The major product formed in the following reaction is: 

The major product of the following chemical reaction is : 

The major product of the following reaction, if it occurs by ${S}_{N}2$ mechanism is : 

The major product of the following reaction is: 

The major product of the following reaction is : 

The major product of the following reaction is :${\mathrm{CH}}_{3}{\mathrm{CH}}_{2}\mathrm{CH}={\mathrm{CH}}_{2}\rightarrow _{\mathrm{Rh}\mathrm{catalyst}}^{{H}_{2}/\mathrm{CO}}$

The major product of the following reaction is : 

The major product (P) in the following reaction is: 

The major products $A$ and $B$ formed in the following reaction sequence are : 

The major products $A$ and $B$ in the following set of reactions are: 

The major products formed in the following reaction sequence $A$ and $B$ are: 

The number of acyclic structural isomers (including geometrical isomers) for pentene are

The number of compound/s given below which contain/s $-\mathrm{COOH}$ group is ___ . (Integer answer) (A) Sulphanilic acid (B) Picric acid (C) Aspirin (D) Ascorbic acid

The number of moles of $\mathrm{CuO},$ that will be utilized in Dumas method for estimating nitrogen in a sample of $57.5g$ of $N,N-$dimethylaminopentane is ________ $\times {10}^{-2}.$ (Nearest integer)

The number of nitrogen atoms in a semicarbazone molecule of acetone is_____

The number of sigma bonds in  is _______.

The number of stereoisomers possible for $1,2$ -dimethyl cyclopropane is:

The potassium ferrocyanide solution gives a Prussian blue colour, when added to :

The product formed in the first step of the reaction of with excess $\mathrm{Mg}/{\mathrm{Et}}_{2}O(\mathrm{Et}={C}_{2}{H}_{5})$ is

The secondary structure of protein is stabilised by:

The stereoisomers that are formed by electrophilic addition of bromine to $\mathrm{trans}-\mathrm{but}-2-\mathrm{ene}$ is/are :

The structure of product $C,$ formed by the following sequence of reactions is : ${\mathrm{CH}}_{3}\mathrm{COOH}+{\mathrm{SOCl}}_{2}\longrightarrow A\rightarrow _{{\mathrm{AlCl}}_{3}}^{\mathrm{Benzene}}\longrightarrow B\rightarrow _{-\mathrm{OH}}^{\mathrm{KCN}}\longrightarrow C$

The structure of the starting compound $P$ used in the reaction given below is: 

The structures of $A$ and $B$ formed in the following reaction are : $[\mathrm{Ph}=-{C}_{6}{H}_{5}]$ 

The total number of amines among the following which can be synthesized by Gabriel synthesis is ________.

The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr, at $\mathrm{pH}12.5$ will be_______ (Integer answer)

The total number of reagents from those given below, that can convert nitrobenzene into aniline is __________ . (Integer answer) I. $\mathrm{Sn}-\mathrm{HCl}$ II. $\mathrm{Sn}-{\mathrm{NH}}_{4}\mathrm{OH}$ III. $\mathrm{Fe}-\mathrm{HCl}$ IV. $\mathrm{Zn}-\mathrm{HCl}$ V. ${H}_{2}-\mathrm{Pd}$ VI. ${H}_{2}-$ Raney Nickel

The total number of $C-C$ sigma bond/s in mesityl oxide $({C}_{6}{H}_{10}O)$ is (Round off to the Nearest Integer).

The transformation occurring in Duma's method is given below ${C}_{2}{H}_{7}N+(2x+\frac{y}{2})\mathrm{CuO}\rightarrow {\mathrm{xCO}}_{2}+\frac{y}{2}{H}_{2}O+\frac{z}{2}{N}_{2}+(2x+\frac{y}{2})\mathrm{Cu}$ The value of $y$ is (Integer answer)

The water soluble protein is:

Thiamine and pyridoxine are also known respectively as:

To synthesise $1$ mole of $2-$methylpropan$-2-$ol from Ethylethanoate equivalents of ${\mathrm{CH}}_{3}\mathrm{MgBr}$ reagent will be required. (Integer value)

Using the provided information in the following paper chromatogram:  The calculated ${R}_{f}$ value of $A\mathrm{is}_____\times {10}^{-1}$.

What is A in the following reaction? 

What is $'X'$ in the given reaction? 

What is the correct sequence of reagents used for converting nitrobenzene into $m$-dibromobenzene?

What is the final product (major) '$A$' in the given reaction?  Major product among the following is?

What is the major product formed by $\mathrm{HI}$ on reaction with 

What is the major product "P" of the following reaction ? 

When $10\mathrm{mL}$ of an aqueous solution of ${\mathrm{KMnO}}_{4}$ was titrated in acidic medium, equal volume of $0.1M$ of an aqueous solution of ferrous sulphate was required for complete discharge of colour. The strength of ${\mathrm{KMnO}}_{4}$ in grams per litre is _______$\times {10}^{-2}.$ (Nearest integer) [Atomic mass of $K=39,\mathrm{Mn}=55,O=16$]

When $0.15g$ of an organic compound was analyzed using Carius method for estimation of bromine, $0.2397g$ of $\mathrm{AgBr}$ was obtained. The percentage of bromine in the organic compound is _________.(Nearest integer) [Atomic mass : Silver $=108,$ Bromine $=80$]

Which among the following is the strongest acid?

Which among the following pairs of Vitamins is stored in our body relatively for longer duration?

Which of the following compound gives pink colour on reaction with phthalic anhydride in conc. ${H}_{2}{\mathrm{SO}}_{4}$ followed by treatment with $\mathrm{NaOH}$?

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

Which of the following compounds does not exhibit resonance ?

Which of the following compounds will provide a tertiary alcohol on reaction with excess of ${\mathrm{CH}}_{3}\mathrm{MgBr}$ followed by hydrolysis ?

Which of the following is a FALSE statement?

Which of the following is an aromatic compound?

Which of the following is correct structure of $\alpha$-anomer of maltose?

Which of the following is correct structure of tyrosine?

Which of the following is least basic?

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

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

Which of the following molecules does not show stereo isomerism ?

Which of the following reaction DOES NOT involve Hoffmann Bromamide degradation ?

Which of the following reaction is an example of ammonolysis?

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

Which of the following reagent is used for the following reaction? ${\mathrm{CH}}_{3}{\mathrm{CH}}_{2}{\mathrm{CH}}_{3}\overset{?}{\rightarrow }{\mathrm{CH}}_{3}{\mathrm{CH}}_{2}\mathrm{CHO}$

Which of the following vitamin is helpful in the blood clotting?

Which of the glycosidic linkage between galactose and glucose is present in lactose?

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

Which one among the following resonating structures is not correct?

Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of ${\mathrm{HgSO}}_{4}$ and ${H}_{2}{\mathrm{SO}}_{4}?$

Which one of the following compounds contains $\beta -{C}_{1}-{C}_{4}$ glycosidic linkage ?

Which one of the following compounds is aromatic in nature?

Which one of the following compounds is non-aromatic?

Which one of the following compounds is not aromatic?

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

Which one of the following compounds will liberate ${\mathrm{CO}}_{2}$, when treated with ${\mathrm{NaHCO}}_{3}?$

Which one of the following gives the most stable Diazonium salt ?

Which one of the following is correct structure for cytosine ?

Which one of the following is the major product of the given reaction? 

Which one of the following pairs of isomers is an example of metamerism?

Which one of the following phenols does not give colour when condensed with phthalic anhydride in presence of conc. ${H}_{2}{\mathrm{SO}}_{4}$ ?

Which one of the following reactions does not occur ?

Which one of the following reactions will not yield propanoic acid?

Which one of the following reactions will not form acetaldehyde?

Which one of the following set of elements can be detected using sodium fusion extract?

Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?

Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?

Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point) ?