Question 1 :
R and S pairs of enantiomers differ from one another in -<br>
Question 2 : Match the heat of combustion with the appropriate diene. <br><table><tr><th>Dienes</th> <th>Heats of combustion</th> </tr><tr><td>(1) Penta-1,2-diene </td> <td>(P) 761.6 kcal/mol</td> </tr><tr><td>(2) Penta-1,3-diene </td> <td>(Q) 768.9 kcal/mol</td> </tr><tr><td>(3) Penta-1,4-diene </td> <td>(R) 777.1 kcal/mol</td> </tr></table>
Question 3 :
{tex} \mathrm {Assertion :} {/tex} Rates of nitration of benzene and hexadeuterobenzene are different.<br>{tex} \mathrm {Reason :} {/tex} {tex} C - H {/tex} bond is stronger than {tex} C - D {/tex} bond<br>
Question 4 :
Identify which of the following group acts as +m as well as -m ?<br>
Question 5 :
Which of the following correctly ranks the cycloalkanes in order of increasing ring strain per methylene group?
Question 6 :
The reaction of toluene with {tex} \mathrm { Cl } _ { 2 } {/tex} in presence of {tex} \mathrm { FeCl } _ { 3 } {/tex} gives predominantly
Question 7 :
Which of the following compounds is least reactive in the nucleophilic aromatic substitution reaction with NaOH?<br>
Question 8 :
{tex} \mathrm {Assertion :} {/tex} Aryl halides are less reactive towards substitution of halogen atom.<br>{tex} \mathrm {Reason :} {/tex} Halogens are {tex} o , p - {/tex} directing in nature.<br>
Question 9 :
{tex} \mathrm {Assertion :} {/tex} Neopentane forms only one monosubstituted compound.<br>{tex} \mathrm {Reason :} {/tex} Neopentane has high bond energy.<br>
Question 10 : Number of chiral carbon persent in the following compound :<br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e79965ac6cb6261b35b418c' height='44' width='184' ><br>
Question 11 :
But-2-ene can be obtained by electrolysis of an aqueous solution of<br>
Question 12 :
Which of the following is formed as a result of biological oxidation of benzene in the body of the dog
Question 14 :
The number of isomers for the aromatic compound C<sub>7</sub>H<sub>8</sub>O are :<br>
Question 15 :
In the reaction:<br>{tex} H C \equiv C H + 2 A g N O _ { 3 } \xrightarrow {N H _ { 4 } O H } X + 2 N H _ { 4 } N O _ { 3 } + 2 H _ { 2 } O {/tex}.<br> {tex} 'X' _ {} {/tex} is
Question 16 : Which is the correct increasing order of the stability of isomers of pentene ?<br>(1) CH<sub>3</sub>-CH<sub>2</sub>-CH<sub>2</sub>-CH=CH<sub>2</sub> <br>(2)<img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799720c6cb6261b35b430d' height='35' width='120' > <br>(3) <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799720d3f9ab617fcdccfc' height='38' width='119' > <br>(4) <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799721adb2ea6185a77b75' height='45' width='140' ><br>
Question 19 :
How many alkene isomers are possible for compound with molecular formula {tex} \mathrm { C } _ { 5 } \mathrm { H } _ { 10 } ? {/tex}
Question 20 :
{tex} \mathrm {Assertion :} {/tex} Freezing point of neopentane is more than {tex} n {/tex} - pentane.<br>{tex} \mathrm {Reason :} {/tex} Increase in Van der Wals forces increases freezing point.<br>
Question 21 :
The correct decreasing order of nucleo-philicity of the following species are - <br>(i) (CH<sub>3</sub>)<sub>3</sub>CO<sup>Θ </sup>(ii) CH<sub>3</sub>O<sup>Θ</sup><br>(iii) (CH<sub>3</sub>)<sub>3</sub>CHO<sup>Θ </sup> (iv) CH<sub>3</sub>CH<sub>2</sub>O<sup>Θ</sup><br>
Question 22 :
Which of the following is the correct order of decreasing SN<sub>2</sub> reactivity ? <br>
Question 23 :
Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
Question 24 :
What is the chief product obtained when n-butane is treated with Br<sub>2</sub> in the presence of light at 130<sup>0</sup>C ?<br>
Question 27 :
The number of secondary hydrogens in {tex} 2,2 {/tex} -dimethyl butane is
Question 28 :
When acetylene is reacted with {tex} H B r {/tex}, we get
Question 29 :
Condition for maximum yield of {tex} C _ { 2 } H _ { 5 } C l {/tex} is
Question 30 :
{tex} \mathrm {Assertion :} {/tex} Cyclolpentadienyl anion is much more stable than ally anion.<br>{tex} \mathrm {Reason :} {/tex} Cyclopentadienyl anion is aromatic in character.<br>
Question 32 : What is the IUPAC name of the following compound?<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5d6138ee06864d5bec7bf0d3" /><br>
Question 37 : How many structures are possible for <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799603adb2ea6185a7787c' height='24' width='40' >with one triple bond? <br>
Question 38 :
{tex} \mathrm {Assertion :} {/tex} Straight chain alkanes have very low octane number.<br>{tex} \mathrm {Reason :} {/tex} Quality of gasoline is measured in terms of octane number.<br>
Question 40 :
Decreasing -I effect of given groups is :<br>(i) CN (ii) NO<sub>2</sub> (iii) NH<sub>2</sub> (iv) F<br>
Question 41 :
The eclipsed and staggered conformation of ethane is due to -<br>
Question 42 : Write correct reactivity order towards photochemical chlorination.<br>(X) CH<sub>3</sub> - CH<sub>2</sub> - CH<sub>2</sub> - CH<sub>2</sub> - CH<sub>3</sub><br> (Y) <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799747c6cb6261b35b43df' height='47' width='156' ><br>(Z) <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799748c6cb6261b35b43e0' height='71' width='100' > (W) CH<sub>3</sub> - CH<sub>3</sub><br>
Question 43 :
The dipole moment of 1, 2-Dichloroethane is 1.12 D. Which statement is correct about this compound.<br>
Question 44 : Isomers of hexane, based on their branching, can be divided into three distinct classes as shown in the figure.<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5ddfa42555734f14efe18c51"><br>The correct order of their boiling point is
Question 45 :
An aromatic amine (X) was treated with alcoholic potash and another compound (Y) then foul smelling gas C{tex}_6{/tex}H{tex}_5{/tex}NC is formed . The compound (Y) was formed by reacting compound (Z) with Cl<sub>2</sub> in the presence of slaked lime. The compound (Z) is<br>
Question 46 :
The reaction of one equivalent of {tex}\mathrm{HBr}{/tex} with {tex} \mathrm { H } _ { 2 } \mathrm { C } = \mathrm { CH } - \mathrm { C } \equiv \mathrm { CH } {/tex} at relatively high temperature gives which of the following as major product?
Question 47 :
How many primary amines are possible for the formula C<sub>4</sub>H<sub>11</sub>N ?<br>
Question 48 :
{tex} \mathrm {Assertion :} {/tex} Propene reacts with {tex} H B r {/tex} in presence of benzoyl peroxide to yield 2-bromopropane.<br>{tex} \mathrm {Reason :} {/tex} In presence of peroxide, the addition of {tex} H B r {/tex} to propene follows ionic mechanism.<br>
Question 49 :
To prepare But-2-yne from 2, 2, 3, 3-Tetrachlorobutane, reagent used is :<br>
Question 50 : The hottest region of Bunsen flame shown in the figure below is : <br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e79976eadb2ea6185a77ce1' height='226' width='181' >
Question 51 :
How many cyclic isomers exists (structural and geometrical only) for {tex} \mathrm { C } _ { 3 } \mathrm { H } _ { 3 } \mathrm { Cl } _ { 3 } ? {/tex}
Question 52 : Consider the following structures,<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5d70ff451a492a697fc1aabd" /><br>Which one of the following statements is correct about the structures {tex} ( \mathrm { X } ) {/tex} and {tex} ( \mathrm { Y } ) ? {/tex}<br>
Question 53 :
The molecule having C atom in highest oxidation state is -<br>
Question 55 :
The compound formed as a result of oxidation of ethyl benzene by {tex}KMnO_4{/tex} is
Question 56 : Identify the polynuclear aromatic compound which is aromatic.<br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799637d3f9ab617fcdcae3' height='108' width='330' ><br>
Question 57 :
{tex} \mathrm {Assertion :} {/tex} All the hydrogen atoms in {tex} C H _ { 2 } = C = C H _ { 2 } {/tex} lie in one plane.<br>{tex} \mathrm {Reason :} {/tex} All the carbon atoms in it are {tex} s p ^ { 2 } {/tex} hybridized.<br>
Question 58 :
Which types of isomerism is shown by {tex} 2,3 {/tex} -dichlorobutane?
Question 59 :
The molecule which has the shortest carbon-oxygen bond length is -<br>
Question 60 :
Although benzene is highly unsaturated it does not undergo addition reactions. The explanation of this can be suggested as. <br>
Question 64 :
Where does cross conjugation occurs ?<br>(I) C<sub>6</sub>H<sub>5</sub> CH<sub>2</sub>CONH<sub>2</sub> (II) C<sub>6</sub>H<sub>5</sub>CONH<sub>2</sub><br>(III) Quinone (IV) C<sub>6</sub>H<sub>5</sub>OCOCH = CH<sub>2</sub><sub><br>
Question 65 :
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains
Question 66 :
A stereoisomer of cyclobutane-1,2-diol has lower solubility in water than its other stereoisomer, which is this isomer and why?
Question 67 :
In the Fischer-Tropsch synthesis of petrol{tex} \dots . {/tex} and {tex} \dots . {/tex} are used as the raw materials
Question 68 : Which of the following represents the staggered conformation of ethane?<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5d710a513881d16956710191" /><br>
Question 69 :
Total D stereoisomers (open chain only) for the given structure will be :<br>CH<sub>2</sub>(OH)CH(OH)CH(OH)CH(OH)CHO<br>
Question 70 : The type of isomerism shown by the following compounds is. <br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e79957dd3f9ab617fcdc78c' height='60' width='318' ><br>
Question 72 : <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5d70fff61a492a697fc1ab3c" /><br>The configurations at the chiral centre and the double bond are respectively,<br>
Question 74 : <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5d70ff2e1a492a697fc1aaad" /><br>Number of chiral center present in above compounds
Question 75 :
The minimum number of carbon atoms in alkane molecule to show chain isomerism is
Question 77 :
Ethane is formed during the formation of chloromethane by chlorination of methane because <br>
Question 78 : <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5d710a493881d1695671018c" /><br>a and {tex} b {/tex} are stereoismers sum of {tex} ( a + b = ? ) {/tex}<br>
Question 79 :
The addition of {tex} \mathrm{ H B r} {/tex} is easiest with
Question 81 :
Which of the following statements concerning 3, 4-dibromo-1-pentene and 3, 5-dibromo-2-pentene are<br>I. They have same molecular formula {tex} \mathrm { C } _ { 5 } \mathrm { H } _ { 8 } \mathrm { Br } _ { 2 } {/tex} <br>II. They are positional isomers <br>III. They have similar chemical properties.<br>
Question 82 :
Which of the following alkene on acid catalysed hydration form 2-methyl propan-2-ol {tex} ? {/tex}
Question 84 : Total number of stereoisomers of the given compound<br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e7995f8c6cb6261b35b3fe7' height='48' width='177' ><br>will be -<br>
Question 86 :
An alkene X is obtained by dehydration of an alcohol Y, X on ozonolysis gives two molecules of ethanal for every molecule of alkene, X and Y are <br>
Question 88 : In reaction <br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799599adb2ea6185a77669' height='77' width='69' ><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799599adb2ea6185a7766a' height='33' width='84' > X + Y<br>Which of the following is incorrect about the reaction ?<br>
Question 89 :
Ozonolysis products of 2-pentyne after decomposition of ozonide with water and subsedquent oxidation are <br>
Question 91 :
Identify the incorrect statement / statements<br>(i) Alkynes are more reactive than alkenes towards electrophilic addition reaction<br>(ii) Alkynes are less reactive than alkenes towards electrophilic addition reaction<br>(iii) Alkynes decolourise Br<sub>2</sub> water<br>(iv) Addition of HBr to alkynes in presence of peroxide proceeds via Markownikoff's rule<br>
Question 93 :
Identify the reaction/statement which is not correct among the following -<br>
Question 94 :
Compound A (i) decolourises Baeyer's reagent (ii) on hydroxylation and further oxidation with {tex} \mathrm {KMnO_4 }{/tex}, gave formic acid and acetone (iii) on ozonolysis gave one molecule of acetone and one molecule of formaldenyde. A is
Question 95 :
How many structural isomers of molecular formula {tex} \mathrm { C } _ { 3 } \mathrm { H } _ { 6 } \mathrm { BrCl } {/tex} ?
Question 96 : Which of the following products is formed when n-heptane is passed over <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e799612adb2ea6185a778c4' height='24' width='113' >catalyst at 773 K? <br>
Question 97 :
The total number of structural ethers possible with the molecular formula C<sub>5</sub>H<sub>12</sub>O<br>
Question 98 : The absolute configuration of the following compound is :<br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e7995f7adb2ea6185a77846' height='91' width='91' ><br>
Question 99 :
Which of the following statements regarding ethanoic acid and methyl methanoate are correct?<br>I. They are functional group isomers with molecular formula {tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 4 } \mathrm { O } _ { 2 } {/tex}.<br> II. They belong to same homologous series.<br> III. They have different chemical properties.<br>
