InterviewSolution
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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.
| 101. |
The major product of the following reaction is A. B. C. D. |
| Answer» Correct Answer - C | |
| 102. |
In which of the following reactions phenol is not obtained:A. B. C. D. |
| Answer» Correct Answer - B | |
| 103. |
Identify the product in following reaction? A. B. C. D. |
| Answer» Correct Answer - D | |
| 104. |
In the reaction sequences A,B,C and D are given by the set:A. Sodium phenate, anisole, `C_(6)H_(5)l, CH_(3)OH`B. Sodium phentate, phenitole, `C_(2)H_(5)l, C_(6)H_(5)OH`C. Sodium phenate, anisole, `C_(6)H_(5)OH, CH_(3)l`D. Sodium phenate, phenitole, `C_(6)H_(5)l, C_(2)H_(5)OH` |
| Answer» Correct Answer - A | |
| 105. |
The product (Y) of the following sequences of reactions would be: A. B. C. D. |
| Answer» Correct Answer - C | |
| 106. |
The product of following sequences of reactions are A. B. C. D. |
| Answer» Correct Answer - B::C::D | |
| 107. |
The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When `-NO_(2)` group is present at ortho or para positions of a leaving group (Nucleofuge) it activates the ring for nucleophilic attack. The reduction of `-NO_(2)` group by metal in acid causes its reduction to `-NH_(2)` group and then the ring becomes strongly activated for a electrophilic attack. The strong activation of `-NH_(2)` group is moderated by its acylation with `CH_(3)COCl` to `-NHAc` group. Deacylation is carried out by hydrolysis with `H_(3)O^(+)` or `OH^(-)`. The ring alkylation by using `RX//AlX_(3)` is not possible in presence of `-NO_(2)` or `-NH_(2)` group but is possible in presence of `-NHAc` group. The product (H) is :A. B. C. D. |
| Answer» Correct Answer - B | |
| 108. |
The `-NO_(2)` group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When `-NO_(2)` group is present at ortho or para positions of a leaving group (Nucleofuge) it activates the ring for nucleophilic attack. The reduction of `-NO_(2)` group by metal in acid causes its reduction to `-NH_(2)` group and then the ring becomes strongly activated for a electrophilic attack. The strong activation of `-NH_(2)` group is moderated by its acylation with `CH_(3)COCl` to `-NHAc` group. Deacylation is carried out by hydrolysis with `H_(3)O^(+)` or `OH^(-)`. The ring alkylation by using `RX//AlX_(3)` is not possible in presence of `-NO_(2)` or `-NH_(2)` group but is possible in presence of `-NHAc` group. The product (I) is :A. B. C. D. |
| Answer» Correct Answer - C | |
| 109. |
(B) on treatment with `Zn//HCl` gives :A. anilineB. benzylamineC. phenylisocyanideD. N-methylaniline |
| Answer» Correct Answer - B | |
| 110. |
(B) on treatment with `Zn//HCl` gives :A. anilineB. benzylamineC. phenylisocyanideD. N-methylaniline |
| Answer» Correct Answer - B | |
| 111. |
(D) on reaction with phenol under alkaline conditions gives :A. diazobenzeneB. hydrazobenzeneC. benzidineD. para hydroxy azobenzene |
| Answer» Correct Answer - D | |
| 112. |
(D) on reaction with phenol under alkaline conditions gives :A. diazobenzeneB. hydrazobenzeneC. benzidineD. para hydroxy azobenzene |
| Answer» Correct Answer - D | |
| 113. |
Which of the following halides will be most reactive in `SN^(2)` reaction and `SN^(2)` reaction respectively? A. `(I),(II)`B. `(II),(I)`C. `(I),(III)`D. `(III),(I)` |
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Answer» Correct Answer - `c` `(I) implies 1^(@)` allyic halide and less steric hindrance,m hence `SN^(2)`. `(III) implies 3^(@)` allylic halide, most stable carbonium ion and hence `SN^(1)`. |
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| 114. |
Consider the following reactiions: Which of the staements are correct?A. Reaction `(I)` is faster than `(II)`.B. Reaction `(II)` is faster than `(I)`.C. Reaction `(III)` is faster than `(IV)`.D. Reaction `(Iv)` is faster than `(III)`. |
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Answer» Correct Answer - `(a,d)` i. Althiough `F^(o-)` is a poor leaving group, in acidic condition, `F` froms `H-` bonding and its departure is easier. So in acidic medium, reaction `(I)` is solvolysed faster than `(II)`. This is an example of electrophilic catalysis. ii. The formation of `Me_(3)C - underset(Me)underset(|)overset(Me)overset(|)(C^(o+))` from `(IV)` reduces some of the streic hindreance or crowding in reactant in `(IV)`, induced by the two `(Me)` groups and the `t-Bu` on the `alpha-C` atom. This is an example of steric acceleration. Moreover, carbocation is further stabilised by `+1` effect of two `(Me)` groups and `t-Bu` groups. So reaction `(IV)` is faster than `(III)` |
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| 115. |
Which of the following reaction(s) is/are neither sterospecific nor steroselective?A. `SN^(1)`B. `SN^(2)`C. `E2`D. `ElcB` |
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Answer» Correct Answer - `a` In `SN^(1)`, the attack by the `Nu^(o-)` is not specific (attack on the carbonium ion form front as well as back) and the products are mixtures of enantiormers thus neither sterospecific nor steroselective. |
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| 116. |
Which of the follwoign ether will always give `SN^(2)` mechanism in acidic as well as basic conditions?A. B. C. D. |
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Answer» Correct Answer - `d` `S` is less `EN` and, therefore more reactive towards `SN^(2)`. |
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| 117. |
Convert |
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Answer» Correct Answer - (a) (i) Conc. `H_(2)SO_(4)` (ii) `KHF_(2)//Delta` or (i) conc. `HNO_(3)//H_(2)SO_(4)` (ii) Sn + HCl (iiI) `NaNO_(2)+HCl` & `HBF_(4)//Delta` (b) `NaOH + CO_(2)` (ii) `H^(o+)` (iii) `(CH_(3)CO)_(2)O` |
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| 118. |
Identify A, B, C, D and write the balanced chemical equations of formarion of A to B and A to C. |
| Answer» Correct Answer - (A) `H_(2)SO_(4)` (conc.), (B) `Br_(2)` (C) `NO_(2)^(o+)` | |
| 119. |
Phenol on treatment with `CO_(2)` in the presence of `NaOH` followed by acidification produces compound X as the major product. X on treatment with `(CH_(3)CO)_(2)O` in the presence of catalytic amount of `H_(2)SO_(4)` producesB. C. D. |
| Answer» Correct Answer - C | |
| 120. |
The product B and C are respectively:A. Phenol and Acetic acidB. Phenol and acetaldehydeC. Benzoic acid and acetoneD. Phenol and acetone |
| Answer» Correct Answer - D | |
| 121. |
Which of the following tetracarboxylic acid form di-anhydride:A. B. C. neither (a) nor (b)D. both (a) and (b) |
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Answer» Correct Answer - D 1, 2-dicarboxylic acid on heating form anhydride |
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| 122. |
Which of the following alkyl halides undergoes the fastest `S_(N^(1))` reaction ?A. Methyl chlorideB. Ethyl chlorideC. Isobutyl chlorideD. tert-Butyl chloride |
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Answer» Correct Answer - `d` Forms `(Me_(3)C^(o+)) 3^(o+) C^(o+)`. SO `SN^(1)` is fastest. |
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| 123. |
The most favourable position (indicated by) for an electrophilic attack isA. B. C. D. |
| Answer» Correct Answer - C | |
| 124. |
, Product (A) of the reaction is:A. B. C. D. |
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Answer» Correct Answer - B It is an example of intramolecular Friedel-Craft alkylation |
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| 125. |
, Compound (X) is:A. 1,2,4-TrinitrobenzeneB. 1,3,5-TrinitrobenzeneC. 1,2,3-TrinitrobenzeneD. Tri-nitro toluene (TNT) |
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Answer» Correct Answer - B Electrophilic aromatic substitution reaction, `NO_(2)` group meta position. |
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| 126. |
Consider the following sequence of reactions: `PhCO_(2)H underset(2. NH_(3))overset(1. PCk_(5))rarr A underset(2. H_(2)//Ni)overset(1. P_(4)O_(10). "heat")rarrB`. The final product (B) is:A. benzonitrileB. benzlamineC. anilineD. benzamide |
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Answer» Correct Answer - B `Ph - underset((A))overset(O)overset(||)(C) - NH_(2) overset(P_(4)O_(10))rarrPh - C -= N overset(H_(2)//Ni)rarr Ph - CH_(2) NH_(2)` |
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| 127. |
The major product of the acetylation of salicylic acid with `Ac_(2)O//H^(+)` followed by heating with anhydrous `AlCl_(3)` is:A. B. C. D. |
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Answer» Correct Answer - B Fries rearrangement |
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| 128. |
The Birch reduction of benzoic acid gives:A. B. C. D. |
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Answer» Correct Answer - A 1,4 addition take place. |
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| 129. |
The major product expected form the mono-bromination of phenyl benzoated is:A. B. C. D. |
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Answer» Correct Answer - D `+ M " of " - underset(..)overset(..)O -` group |
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| 130. |
Incorrect statements regarding above reaction isA. Product A is 2, 4-DNPB. A to B dehydration reactionC. A to B, geometrical isomersm will obtained as a productD. B is known as oxime |
| Answer» Correct Answer - D | |
| 131. |
Which of the following sequence is best suited to convert benzene to 3-chloro aniline?A. nitration, reduction, chlorinationB. chlorination, nitration, reductionC. nitration, chlorination, reductionD. nitration, reduction, acetylation, chlorination, hydrolysis |
| Answer» Correct Answer - C | |
| 132. |
Identify the major product (B).A. B. C. D. |
| Answer» Correct Answer - B | |
| 133. |
Identify the product in the following reaction: A. B. C. D. |
| Answer» Correct Answer - C | |
| 134. |
Observe the following reaction, and select the correct option A. B. C. D. |
| Answer» Correct Answer - D | |
| 135. |
The reaction of `p-` aminophenol with one equivalent of acety1 chloride in the presence of pyridine gives .A. B. C. D. |
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Answer» Correct Answer - D Acetylation reaction, `overset(..)(N)H_(2)` group will be dominent than `- underset(..)overset(..)(O)H` group. |
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| 136. |
Which of the following reactions can be used to prepare acetophenone ?A. `C_(6)H_(6) + CH_(3) COCl underset(2. H_(2)O)overset(1. AlCl_(3))rarr`B. `(C_(6)H_(5) COO)_(2) Ca + (CH_(3) COO)_(2) Ca overset("heat")rarr`C. `C_(6)H_(6)CN underset(1. H_(3)O^(+))overset(1. CH_(3)MgI)rarr`D. All of these |
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Answer» Correct Answer - D All will be used. |
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| 137. |
In the following reaction sequence, the amount of D (in g) formed from 10 moles of acetophenone is ____. (Atomic weights in g `mol^(-1)` : H = 1, C = 12, N = 14, O = 16, Br = 80. The yield (%) corresponding to the product in each step is given in the parenthesis) |
| Answer» Correct Answer - D | |
| 138. |
In which of the following reactions phenol is not obtained :A. B. C. D. |
| Answer» Correct Answer - B | |
| 139. |
The major product of the following reaction is A. B. C. D. |
| Answer» Correct Answer - C | |
| 140. |
Consider the follwing reactions: Arrange the following reactiosn in the decreasing order of greater proportion of inverted product and select the correct answer.A. `(I) gt (II) gt (III) gt (IV)`B. `(II) gt (I) gt (III) gt (IV)`C. `(III) gt (II) gt (I) gt (IV)`D. `(IV) gt (III) gt (II) gt (I)` |
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Answer» Correct Answer - `d` Inverted product means`SN^(2)`. ltBrgt `SN^(2)` reaction is faster in more polar protic solvent with neutral nucelophile `(H_(2)O)`. |
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| 141. |
Which of the following substrates will gave racemised product?A. B. C. D. |
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Answer» Correct Answer - `a` (a) is only optically active product which will give racemic products. Others are not optically active. |
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| 142. |
The product B and C are respectively:A. Phenol acid & acetoneB. Phenol & acetaldehydeC. benzoic acid & acetoneD. Phenol & acetone |
| Answer» Correct Answer - D | |
| 143. |
product. The major product obtained isA. B. C. D. |
| Answer» Correct Answer - B | |
| 144. |
The reaction is known asA. Perkin reactionB. Sandmeyer reactionC. Reimer-Tiemann reactionD. Cannizzaro reaction |
| Answer» Correct Answer - C | |
| 145. |
For the transformationg the reagent used is A. `LiAlH_(4)`B. `H_(3)PO_(2)`C. `H_(3)O^(+)`D. `H_(2)//Pt` |
| Answer» Correct Answer - A | |
| 146. |
Which reagent (X) is used to convert I to IIA. `KBr//NaOH`B. `Br_(2)//NaOH`C. `NaHCO_(3)`D. N-Bromo succinamide |
| Answer» Correct Answer - B | |
| 147. |
under Hofmann conditions will give :A. B. C. D. |
| Answer» Correct Answer - A | |
| 148. |
under Hofmann conditions will give:A. B. C. D. |
| Answer» Correct Answer - A | |
| 149. |
Which of the following is attacking species in conversion Y to P ?A. `C Cl_(2)`B. `: CHCl`C. `:CH_(2)`D. `CH_(2)Cl` |
| Answer» Correct Answer - A | |
| 150. |
The major product of the following reaction: A. B. C. D. |
| Answer» Correct Answer - B | |