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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Primary amine reacts with carbon disulphide and `HgCl_(2)` to produce alkyl isothiocyanate. This reaction is :A. Carbylamine reactionB. Hofmann bromide reactionC. Perkin reactionD. Hofmann mustard oil reaction |
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Answer» Correct Answer - D It is fact. |
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| 52. |
Which of the following compounds would not be considered aromatic in its behaviour ?A. B. C. D. |
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Answer» Correct Answer - B Non-planar structure are not aromatic |
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| 53. |
The substance that gives a primary amine on hydrolysis isA. nitroparaffinB. alkyl cyanideC. oximeD. alkyl isocyanide |
| Answer» Correct Answer - D | |
| 54. |
The reactant (P) is :A. B. C. D. |
| Answer» Correct Answer - A | |
| 55. |
How many groups are `o//p` director in the electrophilic aromatic substitution ? (i) `-NH_(2)` (ii) `-COH` (iii) `-N = O` (iv) `-COOH` (v) `-OMe` (vi) `- O - overset(O)overset(||)(C) - Me` (vii) `-Et` (viii) `- overset(O)overset(||)(C) - NH - Me` (ix) `- N = NH_(2)` (x) `- SO_(3)H` |
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Answer» Correct Answer - 6 (i) `-NH_(2)` (iii) `-N = O`, (v) `-OMe`, (vi) `- overset(..)(O) - overset(O)overset(||)(C) - Me` (vii) `-Et` (ix) `-N = NH_(2)` |
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| 56. |
Which one of the following compounds undergoes bromination of its aromatic ring (electrophilic aromatic substitution) at the fastest rate ?A. B. C. D. |
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Answer» Correct Answer - B `+M " of " -NH-` |
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| 57. |
Which compound in each of the following paris will react faster in `SN^(2)` reaction with `HO^(o-)` ? a. CH_(3)Br` or `CH_(3)I` b. `(CH_(3))_(3)CCl` or `CH_(3)Cl` c. `CH_(2) = CHBr` or `CH_(2) = CH - CH_(2)Br` |
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Answer» `SN^(2)` reactivity: a. `CH_(3)I` (`I^(o-)` is a better leaving group than `Br^(o-)`) , b. `CH_(3)Cl (1^(@) RX)` c. `CH_(2) = CH - CH_(2)Br` (Allylic bromide) Vinyl bromide `(CH_(2) = CH - Br)` neither undergoes `SN^(1)` nor `SN^(2)`. |
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| 58. |
Compare the properties of two isomeric produces x and y formed in the following reaction. |
| Answer» Correct Answer - D | |
| 59. |
`X underset("ether")overset(Mg)rarrY underset(H^(+))overset("Dry " CO_(2))rarr X overset("hot " KMnO_(4))rarrP` The two isomeric compounds which will give the same tricarboxylic acid after the above sequence of reactions, are : A. I and IIB. III and IVC. I and IVD. II and III |
| Answer» Correct Answer - C | |
| 60. |
Which of the following statements (s) for the above sequence of reactions is/are correctA. B. C. D. |
| Answer» Correct Answer - B::D | |
| 61. |
`Ph-NO_(2) overset(Sn//HCl)rarr underset("HCl, " 0^(@)C-5^(@)C)overset(NaNO_(2))rarr underset(Ph-OH)overset("Basic medium")rarr "Product Y"` Find the molecular weight of Y report your answer as `underset(2)overset("Molecular weight")rarr` |
| Answer» Correct Answer - 99 | |
| 62. |
Compare the properties of two isomeric products x and y formed in the following reaction. A. `{:("Acid Strength",H_(2)O " Solubility","Volatility","Malting Point",),(y gt x,y gt x,x gt y,y gt x,):}`B. `{:("Acid Strength",H_(2)O " Solubility","Volatility","Malting Point",),(x gt y,x gt y,y gt x,x gt y,):}`C. `{:("Acid Strength",H_(2)O " Solubility","Volatility","Malting Point",),(y gt x,x gt y,y gt x,y gt x,):}`D. `{:("Acid Strength",H_(2)O " Solubility","Volatility","Malting Point",),(x gt y,y gt x,x gt y,y gt x,):}` |
| Answer» Correct Answer - D | |
| 63. |
Which of the following statement is/are correct :A. P is benzene diazonium chlorideB. Q can not give bromine water testC. R and S are position isomersD. During the formation of R and S from Q, formation of a new C-C bond will takes place. |
| Answer» Correct Answer - A::C::D | |
| 64. |
In the given reaction how many of the following products (1-9) can be formed. |
| Answer» Correct Answer - 3(1,4,9) | |
| 65. |
The products of following sequence of reactions are A. B. C. D. |
| Answer» Correct Answer - B::C::D | |
| 66. |
In the given reaction how many of the following products (1-9) can be formed. |
| Answer» Correct Answer - A::C::D | |
| 67. |
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :A. salicyladehydeB. salicylic acidC. phthalic acidD. benzoic acid |
| Answer» Correct Answer - B | |
| 68. |
The the identification of `beta`-napthol using dye test, it is necessary to use:A. dichloromethane solution of `beta`-naphtholB. acidic solution of `beta`-naphthol.C. neutral solution of `beta`-naphtholD. alkaline solution of `beta`-naphthol |
| Answer» Correct Answer - D | |
| 69. |
The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- The observed pattern of electrophilic substitution can be explained by-A. the steric effect of the halogenB. the steric effect of the tert-butyl groupC. the electronic effect of the phenolic groupD. the electronic effect of the tert-butyl group. |
| Answer» Correct Answer - A::B::C | |
| 70. |
The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- The observed pattern of electrophilic substitution can be explained by-A. the steric effect of the halogenB. the steric effect of the tert-butyl groupC. the electronic effect of the phenolic groupD. the electronic effect of the tert-butyl group |
| Answer» Correct Answer - A::B::C | |
| 71. |
The major product of the following reaction is : A. B. C. D. |
| Answer» Correct Answer - C | |
| 72. |
The major product of the following reaction: A. B. C. D. |
| Answer» Correct Answer - C | |
| 73. |
The products formed in the reaction of cumene with `O_(2)` followed by treatment with dil. HCl are :A. B. C. D. `(#RES_CHM_AC_E03_066_O04.png" width="30%"> |
| Answer» Correct Answer - C | |
| 74. |
Phenol when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid gives:A. o-nitrophenolB. p-nitrophenolC. nitrobenzeneD. 2,4,6-rinitrobenzene |
| Answer» Correct Answer - A | |
| 75. |
In the chemical reaction `CH_(3)CH_(2)NH_(2) + CHCI_(3) + 3KOH rarr (A) + (B) + 3H_(2)O` the compound `(A) `and `(B)` are respectivelyA. `C_(2)H_(5)NC` and `K_(2)CO_(3)`B. `C_(2)H_(5)NC` and `3KCl`C. `C_(2)H_(4)CN` and `3KCl`D. `CH_(3)CH_(2)CONH_(2)` and `3KCl` |
| Answer» Correct Answer - B | |
| 76. |
Which of the following reactions are both sterospecific and steroselective ?A. `SN^(1)`B. `SN^(2)`C. `E1`D. `E2` |
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Answer» Correct Answer - `(b,d)` `SN^(2)` and `E2` are both sterospecific because the attack from the back by `Nu^(o-)` in `SN^(2)` and attack by base `E2` (at `beta-H` atom) are specific. Both of them form exvulsively only one product. |
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| 77. |
Which of the following reactions(s) is/are sterospecific but non-steroselcetive?A. `SN^(2)`B. `E1`C. `E2`D. `ElcB` |
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Answer» Correct Answer - `d` In `ElcB` the first step is sthe abstraction of `beta-H` atom to give carbanion is specfic. But they from a mixture of possible pairs of enatiomers fo or a mixture of possible diastermores. |
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| 78. |
Which of the following reactions(s) is/are both non-sterospecific but steroselective ?A. `SN^(1)`B. `E1`C. `E2`D. `ElcB` |
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Answer» Correct Answer - `b` In `E1` first ionisationof `RX` takes place and then abstraction of `beta-H` atom by base takes place. The carbonium can rerrangement and abstraction of `H` atom by base can be different. So the reaction in not stereospecific but steroselective because of the foramaion of only one product. |
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| 79. |
Which of the follwing reaction s is not sterospecific?A. `SN^(2)`B. Addition of `Br_(2)` to ethyle3ne in `CCl_(4)`C.D. |
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Answer» Correct Answer - `c` a. `SN^(2)` is sterospecific and steroselective. b. Addition of `Br_(2)` is sterospecific , i.e., anti-addtion of two `Br` atoms. c. `SE` reaction is not sterospecific. d. Hydroxylation is sterospecific syn-addion of two `(-OH)` groups. |
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| 80. |
Which of the follwing compounds will undergo Friedel Creadfts alylation with faster rate?A. B. C. D. |
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Answer» Correct Answer - `b` More the `EDG` faster is the `SE` reaction or `F.C` reaction. But `ED` power of `(-NH_(2))` (by resonance) is greater than `(-CH_(3))` (by hyperconjugation). But anilline does not undergo `F.C` reaction. Therefore, in (a) three `H.C` structures. In (c) one `H.C` sturctures. in (d),`(-NO_(2)) EWG, F.C` reaction does not take place. So in (b) `F.C` reaction is fasted. |
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| 81. |
Which of the following is the most stable areonium or benzenium ion?A. B. C. D. |
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Answer» Correct Answer - `b` In (b) positive charge is more stablised due to `+I` effect of `(Me)` group. |
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| 82. |
Consider the following reactions. Which staements(s) is/are wrong.A. The product by path `(I)` is `Me - CH = CH_(2) (I)`B. The product by path `(II)` is `Me - CH (OE) Me (II)`C. The products are mixture of `(I)` and `(II)` by both paths.D. Path `I` proceeds cia `E2` mechanism, while path `II` proceeds via `SN^(1)` mechanism. |
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Answer» Correct Answer - `c` Statement (c) is wrong. i. In path `(I), EtP^(o-)` is a strong base and with `2^(@) RX` groups. The `E2` product predominates over the `SN^(2)` product to give `(Me - CH = CH_(2))` ii. In path `(II), EtOH` is a weak base, but a better nuclophilc so `SN^(-1)` reaction is favored to give `MeCH(OEt)Me` |
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| 83. |
Which of the following staements is wrong about the reactions?A. At lower temperature, the reaction is kinetically controlled and `o//p` directive effects of the `(Me)` group operate.B. At a higher temperature, the reaction is thermo-dynamically controlled, adnn longer reaction times are employed for equilibrium to be reached . The most stable from of `m-` toulene sulphonic acid is obtained.C. `(Me-)` group is activated by `+I` effect, and `o-, p-` directing.D. `(Me-)` group is deactivating by hyperconjugation and is `m-` directing. |
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Answer» Correct Answer - `d` All the staments are self-explanatory. |
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| 84. |
Which of the following staements are correct about `ElcB` reaction ?A. It proceeds via the formation of carbanion intermediate.B. Strong `EWG` and poor leaving groups favour the reaction.C. It is a unimolecular reaction with secound order kinetics.D. When `D` is incorporated in the staring material by the solvent `EtOD` and the reaction is interupted before completion, no `D` is found either in the substrare or in the product. |
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Answer» Correct Answer - `(a,b,c)` Satements `(a),(b)`, and `(c)` are the characteristics of `ElcB` reaction. Statements (d) is wrong since in `ElcB` reaction deuterted product is obtained. |
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| 85. |
Identify the position where electrophilic aromatic substitution (EAS) is most favourable.A. AB. BC. CD. A and C |
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Answer» Correct Answer - B `- NH - overset(O)overset(||)(C) - CH_(3)` (+ M group) (More activating group) |
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| 86. |
(a) (b) (c) (d) Correct order of rate of EAS (electrophilic aromatic substitution) is:A. `c gt b gt a gt d`B. `c gt d gt a gt b`C. `a gt b gt c gt d`D. `c gt d gt b gt a` |
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Answer» Correct Answer - D More electron density of ring more is the rate of electrophilic aromatic substitution. |
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| 87. |
The decreasing fugacity order of the following is: i. `overset(o-)(C)N`, ii. `overset(o-)(O)H`, iii. `overset(o-)(O) Me`, iv. `overset(o-)(C)H_(3)`, v. `H^(o-)`A. `(v) gt (iv) gt (iii) gt (ii) gt (i)`B. `(i) gt (ii) gt (iii) gt (iv) gt (v)`C. `(iv) gt (v) gt (iii) gt (ii) gt (i)`D. `(i) gt (ii) gt (iii) gt (v) gt (iv)` |
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Answer» Correct Answer - `d` Basically and fugacity reversed. |
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| 88. |
The decrasing basic order of the following is: i. `Me_(2)N - Nme_(2)`, ii. `MeNH-NHMe` iii. `H_(2)N - NH_(2)`, iv. `NH_(3)`A. `(i) gt (ii) gt (iii) gt (iv)`B. `(iv) gt (iii) gt (ii) gt (i)`C. `(iv) gt (iii) gt (i) gt (ii)`D. `(iii) gt (iv) gt (ii) gt (i)` |
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Answer» Correct Answer - `a` More `N` atom and more alkyl grou (`+I` effect) more basic: `(i0 gt (ii) gt (iii) gt (iv)`. |
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| 89. |
Which of the following does not give effervescence with `NaHCO_(3)` ?A. PhenolB. p-NitrophenolC. 2,4-dinitrophenolD. 2,4,6-trinitrophenol |
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Answer» Correct Answer - A `NaHCO_(3)` does not give effervescence with phenol. But ortho-para nitro phenols give effervescence with `NaHCO_(3)`. |
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| 90. |
Identify the intermediates of the following reaction. A. B. C. D. |
| Answer» Correct Answer - A::B | |
| 91. |
`3HC -= CH underset(Fe)overset("red hot")rarr (A) underset(AlCl_(3))overset(CH_(3)COCl)rarr(B) underset(25^(@)C)overset(Ni//H_(2))rarr C + D` Relation between C and DA. IdenticalB. enantiomerC. diastereomerD. position |
| Answer» Correct Answer - B | |
| 92. |
`CH_(3)NH_(2)+CHCl_(3)+KOH to` nitrogen containing compound `+KCl+H_(2)O`. Nitrogen containing compound isA. `CH_(3) - C -= N`B. `CH_(3) - NH - CH_(3)`C. `CH_(3) - overset(theta)(N) -= overset(o+)(C)`D. `CH_(3) overset(o+)(N) -= overset(theta)(C)` |
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Answer» Correct Answer - `d` `CH_(3)NH_(2) + CHCl_(3) + 3KOH rarr CH_(3)NC + 3KCl + 3H_(2)O` `CH_(3)NC` or `CH_(5) overset(o+)(N) -= overset(theta)(C)` Methyl isocyanide or methyl carbylamine This reaction is an example of carbylamine reaction and it is used for the distinction of `I^(@)` aminers from `2^(@)` and `3^(@)` amines or identification of `p-` amino group. |
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| 93. |
`CH_(3)NH_(2)+CHCl_(3)+KOH to` Nitrogen containing compound `+KCl + H_(2)O`.A. `CH_(3)-C-=N`B. `CH_(3)-NH-CH_(3)`C. `CH_(3)N^(-) -= C^(+)`D. `CH_(3)-N^(+)-=C^(-)` |
| Answer» Correct Answer - D | |
| 94. |
Consider the follwing halogen containing compounsds: I. `CHCl_(3)`, II. `CCl_(4)`, III. `CH_(2)Cl_(2)` IV. `CH_(3)Cl` , V. A. `(II) lt (V)`B. `(II)`C. `(III)lt (IV)`D. `(I),(IV)` |
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Answer» Correct Answer - `a` In `(II)` and `(IV)` the diipole vectors are cancelled, so there is zero dipole moment. |
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| 95. |
The compound which does not give foul smell when heated with `CHCl_(3)` & KOH isA. m - ToluidineB. `CH_(3)-NH_(2)`C. N-MethylanilineD. `NH_(2)-CH_(2)-CH_(2)-OH` |
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Answer» Correct Answer - C Only `1^(@)` amine give carbyl amine test. |
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| 96. |
Identify the intermediates of the following reaction. A. B. C. D. |
| Answer» Correct Answer - A::B::C::D | |
| 97. |
Correct options for the given below reaction: `Ph-OH overset((i) CHCl_(3)+OH^(-))underset((ii) H^(+)) to` ProductsA. B. C. D. |
| Answer» Correct Answer - A::C | |
| 98. |
Select the correct options :A. Boiling point , `(P gt Q)`B. Melting point, `(Q gt P)`C. Water solubility, `(P lt Q)`D. Acid Strength, `(Q lt P)` |
| Answer» Correct Answer - B::C | |
| 99. |
`X overset(Sn//HCl) to overset(NaNO_(2))underset(HCl)to Z overset(CuCN)underset(Delta)to (P) overset(H_(3)O)to Ph-COOH` correct options is/are:A. X is `Ph-NH_(2)`B. Y is `Ph-NO_(2)`C. Z is `Ph-NH_(2)`D. P is `Ph-CN` |
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Answer» Correct Answer - D `Ph-NO_(2)overset(SN//HCl)rarr PH-NH_(2)underset(HCl)overset(NaNO_(2))rarr PhN_(2)^(+)Cl^(-) underset(Delta)overset(CuCN)rarr Ph-CN overset(H_(3)O)rarr Ph-COOH` |
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| 100. |
Observe the followig reaction and determine True statement A. If aromtic ring I have `-NO_(2)` group then rate of reaction will decrease.B. If aromatic ring II have `-NO_(2)` group then rate of reaction will increase.C. In this reaction wheland intermediate will form.D. In this reaction Meisenheimer intermediate is formed. |
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Answer» Correct Answer - A::B::C It is coupling reaction. |
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