22 + Interview Questions in ARYL-HALIDE-AND-PHENOLS IN GENERAL AWARENESS Page 1 InterviewSolution

1.	Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alyl halides due toA. the forrmation of less stable carbonium ionB. resonance stablisationC. longer carbon halogen bondD. `sp^(2)`-hybridised carbon bonded to halogen
Answer» Correct Answer - B::D

Discussion

2.	Which of the following compounds undergoes nucleophilic substitution most readly?A. B. C. D.
Answer» Correct Answer - D

Discussion

3.	Which one of the following compounds will be most readily hydrolysed in aqueous alkali?A. B. C. D.
Answer» Correct Answer - D

Discussion

4.	Amongst the three isomers of the nitrophenol, the one that is least soluble in water is …………
Answer» Correct Answer - ortho-nitrophenol

Discussion

5.	Phenol is acidic because of the resonance stabilisation of its conjugate base, namely ……….
Answer» Correct Answer - phenoxide ion

Discussion

6.	The acidity of phenol is due to the ….. Of its anion.
Answer» Correct Answer - phenoxide ion

Discussion

7.	When phenol is refluxed with allyl bromide in acetone solution in the presence of anhydrous potassiym carbonate a product may be isolated which, on heating to `200^(@)C` is converted mainly toA. B. C. D.
Answer» Correct Answer - D

Discussion

8.	The number of resonannce structure for N is
Answer» Correct Answer - A

Discussion

9.	Formation of phenol from chlorobenzene is an example of …. Aromatic substitution.
Answer» Correct Answer - nucleophilic

Discussion

10.	Consider the following reaction `Phenol +CH_(2)(excess)+H_(2)SO_(4))to` The expected product(s) of the above reaction is/areA. B. C. D.
Answer» Correct Answer - A::C

Discussion

11.	Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electrophilic aromatic subsititution. It is a general method for the synthesis of subsituted salicyladehydes as depiced below: Which one of the following reagents is used in the above reaction ?A. `aq NaOH +CH_(3)Cl`B. `aq NaOH +CH_(2)Cl_(2)`C. `aq NaOH +C Cl_(4)`D.
Answer» Correct Answer - C

Discussion

12.	Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electrophilic aromatic subsititution. It is a general method for the synthesis of subsituted salicyladehydes as depiced below: The electrophile in this reaction is:A. `_()^()CHCl`B. `^(+)CH Cl_(2)`C. `_()^()C Cl_(2)`D. `^(**)CH Cl_(2)`
Answer» Correct Answer - C

Discussion

13.	Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol, ortho to the hydroxyl group. This reacrtion involves electrophilic aromatic subsititution. It is a general method for the synthesis of subsituted salicyladehydes as depiced below: The structure of the intremediate (I) is:A. B. C. D.
Answer» Correct Answer - B

Discussion

14.	Assertion p-fluoro nitrobenzene is more reactive than p-bromo nitrobenzene in the aromatic necleophilic substitution reaction with acqueous `NaOH` Reason Addition of nuceophilie on the a-carbon of aryl halide is the rate determing step is `S_(N)Ar` reaction.A. Both assertion and reason are correct and reason is the correct explanation of assertionB. Both assertion and reason are correct and reason is not the correct explanation of assertionC. Assertion is correct but reason is incorrect.D. Assertion is incorrect but reason is correct.
Answer» Correct Answer - A

Discussion

15.	Consider the following reaction to answer the next three questions: Y can also be obtained in the above reaction by reacting phenol withA. `NaOH(aq)` followed by passing `CO_(2)(g)` and finally acid hydrolysisB. `CH_(3)Cl//AlCl_(3)` followed by treatment with `KMnO_(4)`(OH^(-))` and finally acid hydrolysisC.D. Either b or C
Answer» Correct Answer - A

Discussion

16.	Asscertain Phenol on treatment with `Br_(2)-H_(2)O` gives 2,4,6-tribromo phenol. ltReasongt Due to strong activation by hydroxyl group trisubstitution takes place.A. Both assertion and reason are correct and reason is the correct explanation of assertionB. Both assertion and reason are correct and reason is not the correct explanation of assertionC. Assertion is correct but reason is incorrect.D. Assertion is incorrect but reason is correct.
Answer» Correct Answer - c

Discussion

17.	For the identification of beta-naphtho1 using dye test it is necessary to _______ of beta-naphtho1 .A. dichloromethane solution of `beta`-naphtholB. acidic solution of `beta`-naphtholC. neutral solution of `beta`-naphtholD. alkaline solution of `beta`-naphthol
Answer» Correct Answer - D

Discussion

18.	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

Discussion

19.	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 on 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

Discussion

20.	Phenol reacts with bromine in carbon disulphide at low temperature to giveA. m-bromophenolB. o-and p-bromophenolC. p-bromophenolD. 2,4, 6-tribromophenol
Answer» Correct Answer - C

Discussion

21.	In the reaction of p-chlorotoluene with `KNH_(2)` is liguid `NH_(3)` the major product is .A. o-toluidineB. m-toludineC. p-touidineD. p-chlorooaniline
Answer» Correct Answer - B

Discussion

22.	Phenol is more reactive than benzene towards electrophilic substitution reaction. In case of Phenol, the intermediate carbocation is more resonance stabilised.A. Statement I is correct, Statement II is correct Statement II is the correct explanation of StatementB. Statement I is correct, Statement II is correct Statement II is not the correct explantion of Statement IC. Statement I is correct, Statement II is incorrectD. Statement I is incorrect, Statement II is correct
Answer» Correct Answer - A

Discussion

Explore topic-wise InterviewSolutions in .

Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alyl halides due toA. the forrmation of less stable carbonium ionB. resonance stablisationC. longer carbon halogen bondD. `sp^(2)`-hybridised carbon bonded to halogen

Which of the following compounds undergoes nucleophilic substitution most readly?A. B. C. D.

Which one of the following compounds will be most readily hydrolysed in aqueous alkali?A. B. C. D.

Amongst the three isomers of the nitrophenol, the one that is least soluble in water is …………

Phenol is acidic because of the resonance stabilisation of its conjugate base, namely ……….

The acidity of phenol is due to the ….. Of its anion.

When phenol is refluxed with allyl bromide in acetone solution in the presence of anhydrous potassiym carbonate a product may be isolated which, on heating to `200^(@)C` is converted mainly toA. B. C. D.

The number of resonannce structure for N is

Formation of phenol from chlorobenzene is an example of …. Aromatic substitution.

Consider the following reaction `Phenol +CH_(2)(excess)+H_(2)SO_(4))to` The expected product(s) of the above reaction is/areA. B. C. D.

For the identification of beta-naphtho1 using dye test it is necessary to _______ of beta-naphtho1 .A. dichloromethane solution of `beta`-naphtholB. acidic solution of `beta`-naphtholC. neutral solution of `beta`-naphtholD. alkaline solution of `beta`-naphthol

In the following reacation. The product(s) formed is/are A. P(major)B. Q(minor)C. R(minor)D. S(major)

Phenol reacts with bromine in carbon disulphide at low temperature to giveA. m-bromophenolB. o-and p-bromophenolC. p-bromophenolD. 2,4, 6-tribromophenol

In the reaction of p-chlorotoluene with `KNH_(2)` is liguid `NH_(3)` the major product is .A. o-toluidineB. m-toludineC. p-touidineD. p-chlorooaniline