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.
| 151. |
`Ph-NH_(2)underset(0^(@)C)overset(HNO_(2))rarr A underset(BF_(3))overset(HF)rarr B overset(Delta)rarr C`, C is :A. `Ph-N-=overset(o+)(N)overset(Θ)(BF_(4))`B. C. D. Ph-F |
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Answer» Correct Answer - D `Ph-NH_(2) underset(0^(@)C)overset(HNO_(2))rarr PhN_(2)Cl underset(BF_(3)//Delta)overset(HF)rarr PH-F` |
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| 152. |
In the following reaction sequence, the amount of D (in g) formed from to 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 - 495 | |
| 153. |
Aniline reacts with mixed acid (conc. `HNO_(3)` and conc. `H_(2)SO_(4)`) at 288 K to give P (51%), Q (47%) and R(2%). The major product (s) of the following reaction sequence is (are) B. C. D. |
| Answer» Correct Answer - D | |
| 154. |
Molecular weight of T will be: |
| Answer» Correct Answer - 78 | |
| 155. |
Find the molecular weight of Z. |
| Answer» Correct Answer - 94 | |
| 156. |
, Product A is :A. B. C. D. None of these |
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Answer» Correct Answer - C Friedel-Craft reaction |
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| 157. |
Identify major product of both respectively.A. B. C. D. |
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Answer» Correct Answer - C `Cl_(2)//hv rArr` Free radical mechanism `Cl_(2)//AlCl_(3) rArr` Electropilic aromatic substitution. According to Baker-Nathan effect, hyperconjugation dominates over inductive effect Hence ortho-position of methyl group has more `e^(-)` density for EAS. |
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| 158. |
`C_(2)H_(5)Br overset(AgCN)to P overset(H_(3)O^(+))to HCOOH+Q` Q is:A. `CH_(3)-CH_(2)CONH_(2)`B. `CH_(3)-CH_(2)-C-=N`C. `CH_(3)-CH_(2)-NH_(2)`D. `CH_(3)-COOH` |
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Answer» Correct Answer - C `CH_(3)CH_(2)Broverset(AgCN)to(CH_(3))CH_(2)-NC overset(H_(3)O^(+))to CH_(3)-CH_(2)-NH_(2)` |
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| 159. |
Predict major product of the above reaction is:A. B. C. D. |
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Answer» Correct Answer - A Because of double bond character carbon -oxygen bond will not cleaved. Only 3 mole of HI will consumed. |
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| 160. |
Which of the following undergoes mustard oil reaction ?A. Primary aminesB. Secondary aminesC. Tertiary aminesD. All of the above |
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Answer» Correct Answer - A Mustard oil reaction gives by `1^(@)` amines because it has 2 active `-H` atoms. |
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| 161. |
The compound which on rection with aqueous nirous acid at low temperature produces an oily nitrosamine, isA. ammoniaB. methylamineC. dimethylamineD. trimethylamine |
| Answer» Correct Answer - C | |
| 162. |
The number of `pi` molecular orbitals completely filled in the ground state of benzene is :A. threeB. oneC. sixD. none |
| Answer» Correct Answer - A | |
| 163. |
The number of `pi` molecular orbitals completely filled in the ground state of benzene is:A. threeB. oneC. sixD. none |
| Answer» Correct Answer - A | |
| 164. |
In benzene, carbon uses all the three p-orbitals for hybridisation . |
| Answer» In benzene, each carbon atom is `sp^(2)-` hydrised: hence, carbon uses only two `p-` orbits for hybrissation. | |
| 165. |
Assertion: In strongly acidic solutions, aniline becomes more reactive towards electrophilic reagents. Reason: the amino group being completely protonate din strongly acidic solution, the lone pair of electrons on the nitrogen is no longer available for resonance.A. Both assertion and Reason are true and Reason is the correct explanation of Assertion.B. Both Assertion and Reason are true and Reason are true but Reason is not correct explanation of Assertion.C. Assertion is true but Reason is false.D. Assertion is false but Reason is true. |
| Answer» Correct Answer - D | |
| 166. |
Which of the following undergoes mustard oil reaction ?A. Primary aminesB. Secondary aminesC. Tertiary aminesD. All the above |
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Answer» Correct Answer - A Mustard oil reaction given by `1^(@)` amines because it has 2 active -H atoms. |
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| 167. |
Which of following statement is/are correct ?A. In Reimer-Tiemann reaction, dichlorocarbene intermediate is produced.B. Reimer-Tiemann reaction is example of electrophilic substitution reaction.C. Highly reactive ring like aniline & highly deactivated ring like nitrobenzene, cyanobenzene do not give Friedel Craft reactionD. All of these |
| Answer» Correct Answer - D | |
| 168. |
What is the product obtaimed by heating the following allylic ether of phenol ? A. B. C. D. |
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Answer» Correct Answer - B Claisen rearrangement. |
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| 169. |
Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolves in aqueous HCl. What is the identity of A ?A. 2-phenylethanamineB. 1-phenylethanamineC. 1-cyclohexylethanamineD. N-ethylaniline |
| Answer» Correct Answer - B | |
| 170. |
Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolves in aqueous HCl. What is the identify of A ?A. 2-phenylethanamineB. 1-phenylethanamineC. 1-cyclohexylethanamineD. N-ethylaniline |
| Answer» Correct Answer - B | |
| 171. |
, Product of the reaction is:A. B. C. D. |
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Answer» Correct Answer - D Reaction with respect to `-NH - overset(O)overset(||)(C) - CH_(3)` (`+M` effect) |
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| 172. |
Which one of the following undergoes nuclephilic aromatic substitution at the faster rate ?A. B. C. D. |
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Answer» Correct Answer - A `S_(N)Ar` (substitution nucleophilic aromatic) `-M` group of `NO_(2)` give fast rate |
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| 173. |
Which one amongst the following carbocations is most stable ?A. `C_(6)H_(5) - overset(oplus)(C)H - C_(6)H_(5)`B. C. `CH_(3) - underset(CH_(3))underset(|)overset(oplus)(C) - CH_(3)`D. |
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Answer» Correct Answer - D Very stable carbocation. |
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| 174. |
Product (A) of the above reaction is:A. B. C. D. |
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Answer» Correct Answer - A (3) `rarr` More volatile (2) `rarr` less boiling point (1) `rarr` Ortho isomer (Intramolecular hydrogen bonding) |
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| 175. |
For the reaction, ? , the best combination of reactants is:A. `C_(6)H_(6)Br + HNO_(3), H_(2)SO_(4)`B. `C_(6) H_(5) Br + H_(2)SO_(4),` heatC. `C_(6)H_(5)NO_(2) + Br_(2), FeBr_(3)`D. `C_(6)H_(5)NO + HBr` |
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Answer» Correct Answer - A `-underset(..)overset(..)(B)r:` is (`o//p`director) |
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| 176. |
The major product of the reaction is : A. B. C. D. |
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Answer» Correct Answer - C Reasonace energy of two individual benzene rings is more than Di-phenyl. |
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| 177. |
Identify the product in the following reaction. A. B. C. D. |
| Answer» Correct Answer - C | |
| 178. |
Product (A) of the reaction is :A. B. no reactionC. No reactionD. |
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Answer» Correct Answer - B `S_(N^(2))` is not possible, double bond character in carbon chlorine bond. |
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| 179. |
In the given conversion best yield will obtained with: A. `A = CH_(3) - overset(O)overset(||)(C) - Cl, AlCl_(3), B = Zn (Hg), HCl`B. `A = Zn (Hg), HCl, B = CH_(3) - overset(O)overset(||)(C) - Cl, AlCl_(3)`C. `A = CH_(3) - CH_(2) - Cl, AlCl_(3), B = Zn (Hg), HCl`D. `A = NH_(2) - NH_(2)//HO^(-), D, B = CH_(3) - CH_(2) - Cl, AlCl_(3)` |
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Answer» Correct Answer - B Clemmensen followed by Friedel-Craft reaction |
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| 180. |
Match the column I and II |
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Answer» Correct Answer - a-p,r; b-p,r; c-p, r; d-p, r If benzene is directly attach with lone pair atom or with `alpha-`H atom than its activating as well as o, p director in the given example. |
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| 181. |
Match the column I and II `{:(,"Column (I)",,"Column (II)",),(,"Group",,"Effect on phenyl ring",),((a),-CH = CH - CO_(2)H,(p),p//p - "directors",),((b),-O - overset(O)overset(||)(S) - CH_(3),(q),"meta-directors",),((c),-NH - overset(O)overset(||)(C) - CH_(3),(r),"Activating group",),((d),- underset(O)underset(||)(S) - CH_(3),(s),"De-activating group",):}` |
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Answer» Correct Answer - a -p, s; b -p, r; c - p, r; d- p, s Basic information |
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| 182. |
Match the compounds given in Column-I with the items given in Column - II. |
| Answer» Correct Answer - (A-q,s,t); (B-p,t); (C-q,t); (D-r,t) | |
| 183. |
X (major product ) X will be -A. B. C. D. |
| Answer» Correct Answer - B | |
| 184. |
The reaction of toluene with chlorine in the presence of light gives:A. B. C. D. |
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Answer» Correct Answer - C Free radical mechanism (side chain halogenation) `Ph - CH_(3) underset(hv)overset(Cl_(2))rarr Ph - CH_(2) - Cl` |
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| 185. |
Indentify the principal organic product of the following reaction. A. B. C. D. |
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Answer» Correct Answer - B `-NO_(2)` is ortho-para director for nucleophilic aromatic substitution. |
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| 186. |
, Indentify the product.A. B. C. D. |
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Answer» Correct Answer - C `Ac_(2) O//Delta` is dehydrating agent (acetic anhydride) that is why anhydride formed. |
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| 187. |
X will be :A. B. C. D. |
| Answer» Correct Answer - A | |
| 188. |
Identify the position where E.A.S. will take place :A. aB. bC. cD. all the position are identical |
| Answer» Correct Answer - B | |
| 189. |
Benzenediazonium chloride can be converted into benzene on treatment with:A. `H_(3)PO_(3)`B. `H_(3)PO_(4)`C. `H_(3)PO_(2)`D. `HPO_(3)` |
| Answer» Correct Answer - C | |
| 190. |
Q.12, Q.13 and Q.14 by appropriately matching the information given in the three columns of the following table. In which amongs the following product is formed by free radical mechanism?A. I) ii) P)B. IV) ii) Q)C. II) iii) Q)D. III) iii) P) |
| Answer» Correct Answer - B | |
| 191. |
In the following reaction, the products formed is(are) A. P (major)B. Q (minor)C. R (minor)D. S (major) |
| Answer» Correct Answer - B::D | |
| 192. |
In the following reacation. The product(s) formed is/are A. P (major)B. Q (minor)C. R (minor)D. S (major) |
| Answer» Correct Answer - B::D | |
| 193. |
The major product(s) of the following reaction is (are) A. PB. QC. RD. S |
| Answer» Correct Answer - B | |
| 194. |
P and Q are isomers of dicarboxylic acid `C_(4)H_(4)O_(4)`. Both decolorize `Br_(2)//H_(2)O`. On heating, P forms the cyclic anydride. Upon treatment with dilute alkaline `KMnO_(4)`, p as well as Q could produce one or more than one from the S,T and U In the following reaction, sequences V and W are respectively. A. B. C. D. |
| Answer» Correct Answer - A | |
| 195. |
The major product(s) of the following is (are): A. PB. QC. RD. S |
| Answer» Correct Answer - B | |
| 196. |
P and Q are isomers of dicarboxylic acid `C_(4)H_(4)O_(4)`. Both decolorize `Br_(2)//H_(2)O`. On heating, P forms the cyclic anydride. Upon treatment with dilute alkaline `KMnO_(4)`, p as well as Q could produce one or more than one from the S,T and U Compounds formed from P and Q are, respectively:A. Optically active S and optically active pair (T,U)B. optically inactive S and optically inactive pair (T,U)C. Optically active pair (T,U) and optically active SD. Optically inactive pair (T,U) and optically inactive S |
| Answer» Correct Answer - B | |
| 197. |
`P` and `Q` are isomers of dicarboxylic acid `C_(4)H_(4)O_(4)`. Bothdecolorize `Br_(2)//H_(2)O`. On heating, `P` forms the cyclic anhydride. Upon treatment with dilute alkaline `KMnO_(4),P` as well as `Q` could produce one or more than one forms `S,T` and `U`. Compounds formed from `P` and `Q` are, respectivelyA. Optically active S and optically active pair (T, U)B. Optically inactive S and optically inactive pair (T, U)C. Optically active pair (T, U) and optically active SD. Optically inactive pair (T, U) and optically inactive S |
| Answer» Correct Answer - B | |
| 198. |
What combination of acid chloride or anhydride and arene would you choose to prepare given compound ? A. B. C. D. |
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Answer» Correct Answer - B `p-`xylene when reacts with succinnic anhydride give the product (Friedel -Craft reaction) |
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| 199. |
Which of the following compounds gives `SN^(1), SN^(2)` and `SN^(2)` mechanisms?A. B. C. D. |
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Answer» Correct Answer - `a` Allyl halides undergo `SN^(1), SN^(2)`, and `SN^(2)`. |
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| 200. |
match the correct combination ?A. (IV) (iii) RB. (I) (i) (R)C. (III) (iv) (P)D. (II) (ii) (R) |
| Answer» Correct Answer - A | |