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1.

`1-`Phenyl ethanol can be prepared by the reaction of `C_(6)H_(5)CHO` with `:`A. `CH_(3)Mgl,` ether followed by hydrolysisB. `C_(2)H_(5)Br+H_(2)O`C. `CH_(3)CH_(2)Br+`Alc.`KOH`D. `CH_(2)Br+Al_(4)C_(3)`

Answer» Correct Answer - A
Discussion
2.

The reaction, is an example of `,`A. Wurtz reactionB. Wittig reactionC. Ullmann reactionD. Williamson reaction

Answer» Correct Answer - 3
Williamson reaction.
Discussion
3.

`p-`nitrophenol and `o-`nitrophenol are separated byA. CrystalizationB. Fractional crystalizationC. DistillationD. Steam distillation

Answer» Correct Answer - D
Discussion
4.

The catalyst used in the preparation of an alkyl chloride by the action of dry HCl on an alcohol isA. Anhydrous `AlCl_(3)`B. `FeCl_(3)`C. Anhydrous `ZnCl_(2)`D. `Cu`

Answer» Correct Answer - 3
`-OH` group is converted into `Cl ` group by `SOCl_(2)` or anhydrous `ZnCl_(2) // ` conc. `HCl` ro `HCl` etc.
Discussion
5.

When ethyl alcohol is oxidised with PCC, it gives `:`A. `CH_(3)COOH`B. `CH_(3)CH_(2)-O-CH_(2)CH_(3)`C. `CH_(3)CHO`D. `CH_(3)COCH_(3)`

Answer» Correct Answer - 3
Discussion
6.

A dextro- rotatory optically active alkyl halide undergoes hydrolysis by `S_(N) 2` mechanism. The resulting alcohol is `:`A. DextorotatoryB. LaevorotatoryC. Optically inactive due to racemizationD. May be dexture or laevorotatory

Answer» Correct Answer - 2
`S_(N)^(2)` reactions occur with inverssion of configuration. Therefore `,` an optically active reactant gives an optically active product whose sign of rotation can not be predicted.
Discussion
7.

When alkyl halide is heated with dry `Ag_(2)O`. It produces `:`A. EsterB. EtherC. KetoneD. Alcohol

Answer» Correct Answer - 2
`RX+"Dry"Ag_(2)O rarrR-O-R+2AgX`
Discussion
8.

`C_(3)H_(6)Cl_(2)underset(2.H_(2)O^(o+) 3.Delta)overset(1. KCN)rarrCH_(2)-underset(underset(CH_(3))|)(C)HCOOH:`Hence reactant is `:`A. `Cl-CH_(2)-CH_(2)-CH_(2)-Cl`B. `CH_(3)-underset(underset(Cl)|)(C)H-underset(underset(Cl)|)(C)H_(2)`C. D.

Answer» Correct Answer - 4
`-CN` group is converted into `-COOH` group under given reaction since `-COOH` group is at `C_(2)` that means one of the chlorine atom is present at `C_(2)` carbon and always when two `-COOH` group are at same carbon atom subsequent heating loses `CO_(2)` so both chlorine atoms are at same `C_(2)` position.
Discussion
9.

The product which is not formed in the following reaction `:` `Ph-underset(underset(OH)|)overset(overset(CH_(3))|)(C)-underset(underset(OH)|)(C)H-underset(underset(OH)|)(C)H-overset(overset(CH_(3))|)(C)H-CH_(2)OHoverset(HIO_(4)("excess"))rarr`A. `HCOOH`B. `Ph-underset(underset(O)(||))(C)-CH_(3)`C. `OHC-overset(overset(CH_(3))|)(CH)-CH_(2)OH`D. `OHC-overset(overset(CH_(3))|)(C)H-CHO`

Answer» Correct Answer - 4
`Ph-underset(underset(OH)|)overset(overset(CH_(3))|)(C)-underset(underset(OH)|)(C)H-underset(underset(OH)|)(C)H-overset(overset(CH_(3))|)(C)H-CH_(2)OHunderset(2"moles")overset(HIO_(4)("excess"))rarrPh-underset(underset(O)(||))(C)-CH_(3)+HCOOH+OCH-overset(overset(CH_(3))|)(C)H-CH_(2)OH`
Discussion
10.

Ethyl alcohol is heated with conc. `H_(2)SO_(4)`. The product formed is `:`A. `CH_(3)=overset(overset(O)(||))(C)-OC_(2)H_(6)`B. `C_(2)H_(6)`C. `C_(2)H_(4)`D. `C_(2)H_(2)`

Answer» Correct Answer - 3
Ethyl alcohol on dehydration with conc. `H_(2)SO_(4)` at `170^(@)C` give ethylene.
`CH_(3)-CH_(2)-OH underset("conc."H_(2)SO_(4)
("ethylene"))overset(170^(@)C)rarr CH_(2)=CH_(2)+H_(2)O`
Discussion
11.

The above transformation proceeds throughA. Eelctrophilic - additionB. Benzyne intermediateC. Nucleophilic substitutionD. Electrophilic substitution

Answer» Correct Answer - 3
`OH^(-)` is stronger nucleophile then `Cl^(-)`
Discussion
12.

Observe the following sequence of reaction and find the structure of A. A. `CH_(3)CH_(2)CH_(2)OH`B. `CH_(3)CH(OH)CH_(3)`C. `CH_(3)CH_(2)OH`D. `CH_(3)CH_(2)CH_(2)CH_(2)OH`

Answer» Correct Answer - 2
Discussion
13.

Product Main product in above reaction is `:`A. B. C. D.

Answer» Correct Answer - B
Discussion
14.

When `PhMgBr` reacts with `t-` Butanol, the product would not be ……………..A. BenzeneB. `(CH_(3))_(3)COMgBr`C. `(CH_(3))_(3)C-Br`D. All are incorrect.

Answer» Correct Answer - C
`Ph-MgBr+(CH_(3))_(3)C-CHrarrPh-H+(CH_(3))_(3)C-OMgBr`
Discussion
15.

What is the product in following reaction ? A. B. C. D.

Answer» Correct Answer - 1
Discussion
16.

Select false statement from the following ?A. B. `E-1` reaction can be ragio selective .C. `S_(N)2 & E2` reactions are stereo specific.D. In `E1` and `E2` reactions inversion of configuration takes place.

Answer» Correct Answer - 4
Discussion
17.

Chloropicrin is obtained when chloroform reacts with `………………….` and reaction is `……………….`A. Nitric acidB. Picric acidC. Nitrous acidD. Acetic acid

Answer» Correct Answer - 1
Discussion
18.

`CHCl_(3)+OH^(-)rarrHCOO^(-), `intermediate of this reaction can beA. `: C Cl_(3)^(-)`B. `: C Cl_(2)`C. Both `(1)` and `(2)`D. can not be predicted

Answer» Correct Answer - C
`CHCl_(3)+OHrarrC Cl^(-)underset(-Cl^(-))rarrC Cl_(2)underset(OH^(-))overset(H_(2)O)rarrHCOO^(-)`
Discussion
19.

Which of thye following will be most reactive for `E_(1)` reaction ? .A. B. `C_(6)H_(5)-overset(overset(Br)|)(C)-Br`C. `CH_(2)=CH-overset(overset(Br)|)(c)H-CH_(3)`D. `CH_(2)=CH-underset(underset(CH_(3))|)overset(overset(Br)|)(C)-CH_(2)`

Answer» Correct Answer - 1
According to stability of carbocation
Discussion