Question 1 :
A molecule having three different chiral carbon atoms, how many stereoisomers it will have?
Question 3 :
Select the organic compounds aliphatic in nature but burn with smoky flame :
Question 7 :
The study of three dimensional structure of molecule is called :
Question 8 :
The basicity of aniline is less than that of cyclohexylamine. This is due to
Question 10 :
Compounds whose molecules are superimposable on their mirror images even though they contain asymmetric carbon atoms or chiral centres are known as :
Question 11 :
The number of different substitution products possible when ethane is allowed to react with bromine is sunlight are :
Question 20 : A secondary(2 <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f5c7a3d2442ab8292acd"> carbon is one that is joined to :
Question 22 :
What will be the compound if two valencies of carbonyl group are satisfied by two alkyl groups?
Question 25 : Consider the following carbanions<br> <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f623a3d2442ab8292c1e"> <br> Correct order of stability is
Question 26 :
In a solution, solvent can be separated from solute by one of the following process
Question 27 :
The prefix name of SH group in IUPAC system is :
Question 30 : How many sigma and pi bonds are there in the molecule of di cyano ethane <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f600a3d2442ab8292b2d">
Question 35 : Examine the following statements regarding <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f561a3d2442ab82929c9"> reaction <br> (1) The rate of reaction is independents of concentration of nucleophile<br> (2) The nucleophile attacks the carbon atom on the side of molecule opposite to the group being displaced<br> (3) The reaction proceeds with simultaneous bond formation and rupture<br> Which of the above written statements is correct?
Question 41 :
A liquid decomposes at its normal boiling point. It can be purified by
Question 42 :
Why is light necessary to bring in chlorination reactions of alkane?
Question 43 : In IUPAC suffix name of CO <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f5d2a3d2442ab8292b0b"> is :
Question 44 :
Sodium nitroprusside when added to an alkaline solution of sulphide ions produces a colouration
Question 46 :
Vital force theory of the origin of organic compounds was discarded by :
Question 49 :
Bond energy ......... with the increase in number of lone pairs on the bonded atoms.
Question 51 :
When a nitrogenous organic compound is fused with sodium, the nitrogen present in the compound is converted into____________.<br/>
Question 52 :
Which of the following technique is most suitable for purification of cyclohexanone from a mixture containing benzoic acid, isoamyl alcohol, cyclohexane and cyclohexanone?
Question 54 : The shape of transition state is -<br> <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/NEET/5dfc7452ce13786b5fded60e' /> <br>
Question 55 : Reactivity towards nucleophilic addition reaction of<br> (I) <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f539a3d2442ab82928e5"> is
Question 56 : Consider the following compounds.<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5df320d28701466b65e04f77"><br>The correct decreasing order of their reactivity towards hydrolysis is
Question 57 : In the reaction shown below the six membered ring is generated by shifting which bond<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5dfc6727ec37fa6b8da70cd6"><br>
Question 60 :
An important chemical method to resolve a racemic mixture makes use of the formation of
Question 61 : <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5dfc682aec37fa6b8da714ee"><br>The correct order of heats of combustion of above compounds is:<br>
Question 64 :
The order of activity of the various {tex}\mathrm o -{/tex} and {tex}\mathrm p -{/tex} director is
Question 65 :
Species containing carbon with three bonds and an electron are called :
Question 66 : A solution of D(+)-2-chloro-2-phenylethane in toluene racemises slowly in the presence of small amount of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f568fdd8313cc8725bce"> due to the formation of
Question 69 :
Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
Question 70 :
Which of the following statements is not characteristic of free radical chain reaction?
Question 71 : An organic compound <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f50da3d2442ab8292809"> having molecular formula <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f50ea3d2442ab829280a"> has 6 carbons in a ring system, two double bonds and also a nitro group as substitutent. The <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f50da3d2442ab8292809"> is :
Question 72 :
Which of the following sodium compound/compounds are formed when an organic compound containing both nitrogen and sulphur is fused with sodium?
Question 76 :
The production of an optically active compound from a symmetric molecule without resolution in termed as :
Question 80 :
Which one is the seniormost functional group in the nomenclature of an organic compound if it possesses more than one functional group?
Question 81 :
Mixture of sugar and common salt is separated by crystallisation by dissolving in
Question 83 :
Which type of strain is present in fully eclipsed conformation of butane?
Question 87 : The number of different amines corresponding to the formula <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f582a3d2442ab8292a10"> is :
Question 91 :
State of hybridization of carbon atom of carbene in the singlet state is :
Question 92 :
Select the organic compound which was prepared for the first time in laboratory from its elements :
Question 93 :
The production of an optically active compound from a symmetric molecule without resolution is called :
Question 94 :
In butane, which of the following forms has the lowest energy?
Question 95 : The maximum number of alkyl groups in <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f5b0fdd8313cc8725ce9"> is :
Question 96 : Amongst the following which of the above are true for <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f58aa3d2442ab8292a41"> reaction?<br> (i) The rate of reaction is independent of the concentration of the nucleophile.<br> (ii) The nucleophile attacks the carbon atom on the side of the molecule opposite to the group being displaced.<br> (iii) the reaction proceeds with simultaneous bond formation and bond rupture.
Question 101 :
In Carius method for the quantitative estimation of phosphorous, by using magnesia mixture, phosphorous is estimated by___________.
Question 103 : The total number of cyclic isomers possible for a hydrocarbon with the molecular formula <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f500fdd8313cc8725b9d"> is
Question 105 :
1.6 g of an organic compound gave 2.6 g of magnesium pyrophosphate. The percentage of phosphorus in the compound is:
Question 106 :
Detection of sulphur in sodium extract (Lassaigne test) is not done by which of the following reagents ?<br/>
Question 107 :
What is the decreasing order of strength of the bases<br>{tex} \mathrm { OH } ^ { - } , \mathrm { NH } _ { 2 } ^ { - } , \mathrm { HC } \equiv \mathrm { C } ^ { - } {/tex} and {tex} \mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } ^ { - } ? {/tex}<br>
Question 108 :
In Dumas' method of estimation of nitrogen 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (aqueous tension at 300 K = 15 mm).
Question 109 : The stability of carbanions in the following.<br><img style='object-fit:contain' src="https://data-screenshots.sgp1.digitaloceanspaces.com/5d6517fc96486373b3644d4f.jpg" /><br>is in the order of
Question 110 : <p></p>STATEMENT-1 : Beilstein's test is used to detect halogens in organic compounds.<br>STATEMENT-2 : Beilstein's test is not always dependable.<br>
Question 111 :
Blood-red colour in the detection of both N and S in Lassaigne's extract is due to the formation of__________.
Question 112 :
The number of structural isomers for {tex}\mathrm{ C _ { 6 } H _ { 14 }} {/tex} is:
Question 114 :
An organic compound contains {tex} \mathrm { C } = 40 \% , \mathrm { H } = 13.33 \% {/tex} and {tex} \mathrm { N } = 46.67 \% . {/tex} Its empirical formula would be
Question 115 :
In an estimation of sulphur by Carius method, $0.234$ g of an organic sulphur compound afforded $0.334$ g of $BaSO_4$. Find the percentage of Sulphur in the compound.<br/>
Question 116 :
7.5 ml of a gaseous hydrocarbon was exploded with 36 ml of $O_2$. On cooling, the volume of gases was found to be 28.5 ml, 15 ml of which was absorbed by $KOH$ and the rest was absorbed in a solution of alkaline pyrogallol. The formula of hydrocarbon is:
Question 117 : The order of stability of the following tautomeric compounds is:<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5df320da8701466b65e04f7e"><br>
Question 118 : <img style='object-fit:contain' src="https://data-screenshots.sgp1.digitaloceanspaces.com/5e006264ee7a9376db889ca0.jpg" /><br>The correct relation between the bond lengths {tex} a {/tex} and {tex} b {/tex} is:<br>
Question 119 : Which of the following resonance structure is lowest in energy?<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5dfc6a0cec37fa6b8da78f17"><br>
Question 120 : Which of the following orders is correct for heat of hydrogenation of these compounds?<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5dfc6a35ce13786b5fded3f2"><br>
Question 121 :
An organic compound was used with sodium metal and extracted with distilled water. On adding freshly prepared $FeSO_{4}$ solution followed by the addition of $FeCl_{3}$ and dil. $HCl$ produced a greenish blue solution. 0.30g of the organic compound after Kjeldahlisation evolved a gas $(X)$ which was passed on 100 ml of 0.1 M $H_{2}SO_{4}$. The excess of acid required 20 ml of 0.5 M $NaOH$ for neutralization.<br/>The organic compound which suitably fits into the above data is:<br/>
Question 122 :
An organic compound (Mol. wt. $=$ 60) is found to contain $C = 20\%, H = 6.67\%, N = 46.67\%$ and remaining is oxygen. On heating, it gives $NH_{3}$ along with a solid residue. The solid residue gives violet colour with alkaline $ CuSO_{4}$. The compound is:<br/>
Question 123 :
The blue compound is formed in the positive test for nitrogen with Lassaigne's solution of an organic compound is:<br>
Question 124 :
Arrange the carbanions, $(\mathrm{C}\mathrm{H}_3)_{3}\overline{\mathrm{C}},\overline{\mathrm{C}}\mathrm{C}l_{3},(\mathrm{C}\mathrm{H}_3)_{2}\overline{\mathrm{C}}\mathrm{H},\ \mathrm{C}{}_{6}\mathrm{H}_{5}\overline{\mathrm{C}}\mathrm{H}_{2}$ , in order of their decreasing stability:<br/>
Question 125 : The ammonia evolved from the treatment of $1.50$ g of an organic compound for the estimation of nitrogen was passed in $100$ ml of $0.5$ M sodium hydroxide solution for complete neutralization. <div><br/></div><div>The organic compound is:<br/></div>
Question 126 :
An organic compound was used with sodium metal and extracted with distilled water. On adding freshly prepared $FeSO_{4}$ solution followed by the addition of $FeCl_{3}$ and dil. $HCl$ produced greenish blue solution. 0.30g of the organic compound after kjeldahlisation evolved a gas (X) which was passed on 100 ml of 0.1 M $H_{2}SO_{4}$. The excess of acid required 20 ml of 0.5 M $NaOH$ for neutralisation.<br/>Dil. $HCl$ is added to the solution in the above test to:<br/>
Question 128 : A mixture containing the following four compounds is extracted with {tex} 1 \mathrm { M \ HCl} {/tex}. The<br>compound that goes to aqueous layer is<br> <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/NEET/5dfc6fc3ce13786b5fded60c' />
Question 131 :
2.18 g of an organic compound containing sulphur produces 1.02 g of $BaSO_4$. the percentage of sulphur in the compound is:
Question 132 :
Cyclohexanol {tex}\mathrm{(I)}{/tex}, acetic acid {tex}\mathrm{(II)}{/tex}, {tex} 2,4,6 {/tex} -trinitrophenol {tex}\mathrm{(III)}{/tex} and phenol {tex}\mathrm{(IV)}{/tex} are given. In these the order of decreasing acidic character will be:
Question 133 :
0.92 g of an organic compound was analysed by combustion method. The mass of the U- tube increased by 1.08 g. What is the percentage of hydrogen in the compound?
Question 135 :
The general formula {tex} \mathrm { C } _ { \mathrm { n } } \mathrm { H } _ { 2 \mathrm { n } } \mathrm { O } _ { 2 } {/tex} could be for open chain
Question 136 :
The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is
Question 137 :
In Dumas' method of estimation of nitrogen 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (aqueous tension at 300 K = 15 mm).
Question 138 : Match the column I with column II and mark the appropriate choice.<table class="wysiwyg-table"><tbody><tr><td></td><td>Column I</td><td></td><td>Column II</td></tr><tr><td>1</td><td>Beilstein test</td><td>1</td><td>Sulphur</td></tr><tr><td>2</td><td>Sodium nitroprusside</td><td>2</td><td>Carbon</td></tr><tr><td>3</td><td>Liebig's method</td><td>3</td><td>Nitrogen</td></tr><tr><td>4</td><td>Kjeldahl's method</td><td>4</td><td>Chlorine</td></tr></tbody></table>
Question 141 :
The Lassaigne's extract is boiled with dil.{tex}\mathrm{HNO_3}{/tex} before testing for halogens because
Question 142 :
Assertion: The order od stability of carbocation is $3^o > 2^o > 1^o$
Reason: Carbon atom in carbocation is in $sp^3$ state os hydridisation.
Question 143 :
The best method for the separation of naphthalene and benzoic acid from their mixture is:
Question 144 :
$0.2595\ g$ of an organic substance in a quantitiative analysis yielded $0.35\ g$ of the barium sulphate. The percentage of sulphur in the substance is
Question 145 : <div>$20$ ml of a gaseous hydrocarbon required $400$ ml of air for complete combustion. The air contains $20$% by volume of oxygen. The volume of gaseous mixture after explosion and cooling was found to be $380$ ml. Volume of $CO_2$ is:</div>
Question 146 :
Assertion: Potassium can be used in Lassaigne test.
Reason: Potassium reacts vigorously.
Question 147 :
Which one of the following statement is false with respect to deep red colouration produced with $NH_4SCN?$
