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. |
Aliphatic nucleophilic substitution is mainly of two type `S_(N^(1))" and "S_(N^(2)) . S_(N^(2))` reaction proceed with strong nucleophile in polar aprotic solvent. `3^(@)` halides do not give `S_(N^(2))` reaction. Inverted products are obtained in this reaction and mechanism of reaction occurs through the formation of transition state. `S_(N^(1))` reaction proceed through the formation of carbocation in polar aprotic solvent. Solvent itself acts as nucleophile in this reaction. Racemization takes place in `S_(N^(1))` reaction. Which one of the following will give racemised product in `C_(2)H_(5)OH`?A. `H_(3)C-underset(CH_(3))underset(|)(CH)-Br`B. `Ph-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-Cl`C. `Ph-overset(CH_(3))overset(|)underset(H)underset(|)C-Cl`D. |
| Answer» Correct Answer - C | |
| 102. |
Major product of the following reaction is :A. B. C. D. |
| Answer» Correct Answer - A | |
| 103. |
Which of the following reactions will go faster if concentration of nucleophile is increased?A. B. C. D. |
| Answer» Correct Answer - A | |
| 104. |
Consider the following sequence of reactions `underset(C_(3)H_(6)Cl_(2))Aoverset(alc.KOH)underset(triangle)rarrBoverset(B_(2)H_(6))underset(H_(2)O_(2)//overset(Θ)OH)rarrC, Aoverset(aq.KOH)underset(triangle)rarrC.` The compound A is :A. B. C. D. |
| Answer» Correct Answer - A | |
| 105. |
`H_(3)C-overset(Θ)SNa^(oplus)+CH_(3)CH_(2)-Xrarr` The reaction is fastest when X is :A. `-OH`B. `-F`C. `-O-overset(O)overset(||)C-CF_(3)`D. `-O-overset(O)overset(||)C-CH_(3)` |
| Answer» Correct Answer - C | |
| 106. |
In the given reaction, `(X)+RMgX(excess)overset(H^(oplus)//H_(2)O)rarr3^(@)` Alcohol (X) may be:A. `R-overset(O)overset(||)C-Cl`B. `R-overset(O)overset(||)C-OC_(2)H_(5)`C. `R-overset(O)overset(||)C-R`D. `R-overset(O)overset(||)C-H` |
| Answer» Correct Answer - A::B::C | |
| 107. |
`Ph-overset(O)overset(||)C-overset(O)overset(||)C-Phoverset(H_(3)CMgBr)underset(H_(3)^(⊕)O)rarr` How many products will be obtained and how many can be separated by fractional distillation method ?A. 3,3B. 2,3C. 3,2D. 2,2 |
| Answer» Correct Answer - C | |
| 108. |
`RMgBr+Aoverset(H_(3)O^(⊕))rarrCH_(3)CH_(2)OH, R and A are :A. `CH_(3)CH_(2)`-and HCHOB. C. both are correctD. none is correct |
| Answer» Correct Answer - C | |
| 109. |
`Cl-overset(OH)overset(|)C-OEt""overset(PhMgBr(excess))underset(H_(3)^(oplus)O)rarr` Product :A. `Ph-overset(OH)overset(|)underset(Ph)underset(|)C-Ph`B. `Ph-overset(O)overset(||)C-Cl`C. `Ph-overset(O)overset(||)C-OEt`D. `Ph-overset(O)overset(||)C-Ph` |
| Answer» Correct Answer - A | |
| 110. |
`Ph-CH_(2)-CH_(2)overset(oplus)-overset(CH_(2)CH_(3))overset(|)underset(CH_(2)CH_(2)CH_(3))underset(|)N-CH_(3) overset(oversetΘOH)underset(triangle)rarr`A. `H_(2)C=CH_(2)`B. `Ph-CH=CH_(2)`C. `H_(3)C-CH=CH_(2)`D. `Ph-overset(CH_(3))overset(|)C=CH_(2)` |
| Answer» Correct Answer - B | |
| 111. |
`Cl-overset(O)overset(||)C-Cloverset(PhMgBr(excess))underset(H_(3)^(oplus)O)rarr(X),` Product (X) is :A. `Ph-overset(O)overset(||)C-Cloverset`B. `Ph-overset(O)overset(||)C-Phoverset`C. `Ph-overset(OH)overset(|)underset(Ph)underset(|)C-Phoverset`D. `Ph-overset(O)overset(||)C-O-Ph` |
| Answer» Correct Answer - C | |
| 112. |
`H-overset(O)overset(||)C-overset(O)overset(||)C-Hoverset(CH_(3)MgBr(excess))underset(H_(3)^(⊕)O)rarr` Product :A. `H_(3)C-underset(O)underset(||)C-underset(O)underset(||)C-H`B. `H_(3)C-underset(OH)underset(|)CH-underset(OH)underset(|)CH-CH_(3)`C. `H_(3)C-underset(O)underset(||)C-underset(O)underset(||)C-CH_(3)`D. `{:(CH_(2)OH),(|),(COOH):}` |
| Answer» Correct Answer - BB is Correct | |
| 113. |
Which of the following ketone does not react with `CH_(3)MgBr`?A. `CH_(3)-overset(O)overset(||)C-CH_(3)`B. C. `H_(3)C-overset(CH_(3))overset(||)underset(CH_(3))underset(|)C-overset(O)overset(||)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(3)`D. `Ph-overset(O)overset(||)C-CH_(3)` |
| Answer» Correct Answer - B::C | |
| 114. |
Which of the following compounds on reaction with `CH_(3)MgBr` will give a tertairy alcohol ?A. `C_(6)H_(5)CHO`B. `C_(2)H_(5)CO_(2)CH_(3)`C. `C_(2)H_(5)COOH`D. |
| Answer» Correct Answer - B | |
| 115. |
`CH_(3)MgBr+CH_(2)=CH-overset(O)overset(||)C-Hoverset(H_(3)O^(+))rarr`Product (1,4 addition). It is :A. `CH_(2)=CH-underset(CH_(3))underset(|)overset(OH)overset(|)C-H`B. `underset(OH)underset(|)CH_(2)CH=CH-CH_(3)`C. `CH_(3)CH_(2)CH_(2)CHO`D. none of the above is correct |
| Answer» Correct Answer - C | |
| 116. |
`R-CH_(2)-CH_(2)-overset(Θ)Ooverset(oplus)Naoverset(CS_(2))underset(CH_(3)-1)rarroverset(triangle)rarr`gives:A. `R-CH_(2)-CH_(2)-I`B. `R-CH=CH_(2)`C. `R-CH_(2)=SH`D. `H_(3)C-SH` |
| Answer» Correct Answer - B::D | |
| 117. |
Find the product of the following reaction `CH_(3)CH_(2)MgBr+HgCl_(2)rarr(X):(X)` will be :A. `(CH_(3)CH_(2))_(2)Hg`B. `CH_(3)CH_(3)`C. `CH_(3)CH_(2)Cl`D. `CH_(3)CH_(2)HgCl` |
| Answer» Correct Answer - A | |
| 118. |
Identify the structure of product :A. B. C. D. |
| Answer» Correct Answer - C | |
| 119. |
Alkyl iodide can be prepared by :A. `R=CH_(2)COOAg+I_(2)overset("C"Cl_(4))rarr`B. `R-CH_(2)-Cl-NAloverset("acetone")rarr`C. `R-OH+HIrarr`D. `CH_(4)+I_(2)overset(hv)rarr` |
| Answer» Correct Answer - A::B::C | |
| 120. |
What product would be formed from the `S_(N^(2)` reaction of (R)-2 bromobutane and hydroxide ion ?A. 2- butanolB. (S)-2-butanolC. (R)-3-hexanolD. 3-pentanol |
| Answer» Correct Answer - B | |
| 121. |
Treatment of 2-bromobutane with hot alcoholic KOH gives a mixture of three isomeric butenes (A),(B) and (C). Ozonolysis of the minor product (A) gives HCHO and another aldehyde in equimolar amounts. Both (B) and (C) gave the same single product (D) on ozonolysis. Find structural formula of (D) :A. B. C. D. |
| Answer» Correct Answer - B | |
| 122. |
Which of the following halides undergo `E_(2)` elimination?A. B. C. D. |
| Answer» Correct Answer - A::B | |
| 123. |
Which of the following reactions will undergo an elimination reaction and an alkene will be formed in the product ?A. B. C. D. |
| Answer» Correct Answer - D | |
| 124. |
Arrange the following alkyl chlorides in order of decreasing reactivity in an `S_(N^(1)` reaction : (I) isopropyl bromide , (II) propyl bromide (III) tert-butyl bromide , (IV) methyl bromideA. `(III)gt(I)gt(II)gt(IV)`B. `(I)gt(III)gt(IV)gt(II)`C. `(IV)gt(III)gt(II)gt(I)`D. `(I)gt(II)gt(III)gt(IV)` |
| Answer» Correct Answer - A | |
| 125. |
Identify the compounds which may give NGP reaction :A. B. C. D. |
| Answer» Correct Answer - A::B::C | |
| 126. |
Consider the following reaction Major product :A. B. C. D. |
| Answer» Correct Answer - D | |
| 127. |
What is the major product of following reaction?A. B. C. `CH_(2)=CH-overset(O)overset(||)C-OH`D. All are incorrect |
| Answer» Correct Answer - B | |
| 128. |
What is the major product of following reaction? A. B. C. `CH_(2)=CH-overset(O)overset(||)C-OH`D. All are incorrect |
| Answer» Correct Answer - B | |
| 129. |
In the following reaction the most probable product will be : A. B. C. D. |
| Answer» Correct Answer - B | |
| 130. |
Which reaction take place at the fastest rate?A. B. C. D. |
| Answer» Correct Answer - C | |
| 131. |
The rate of `S_(N^(1))` reaction is fastest with :A. B. C. D. |
| Answer» Correct Answer - A | |
| 132. |
The compound which undergoes fastest reaction with aq. NaOH solution is :A. `C_(6)H_(5)-underset(Cl)underset(|)CH-OCH_(3)`B. `C_(6)H_(5)-underset(Cl)underset(|)CH-CH_(3)`C. `C_(6)H_(5)-CH_(2)-CH_(2)-Cl`D. `C_(6)H_(5)-underset(Cl)underset(|)CH-CH_(2)CH_(3)` |
| Answer» Correct Answer - A | |