0000008499 00000 n x�\͒ܶ��)��F��"@���e��T"����N�V�q�3��6�r�{�!�H�@�$`��C�ww�lt���E���w❐������C/�~�qz-~���{)^������������_Ʀ�q�E��ۦiT��N|y%:{��qu'�^]�Z Download Electrophilic Aromatic Substitution Reaction (Chemistry) notes for IIT-JEE Main and Advanced Examination. Helpful? 0000006522 00000 n 0000007757 00000 n If the bond is broken in favor of carbon in the ring, then although the ring becomes aromatic but oxygen will bear +ve charge which is very unstable. Please do not forward your results unless your lecturer has specifically requested that you do so. In which selection are the amines arranged from most basic to least basic? Try the following multiple choice questions to test your knowledge of this chapter. Anti-aromatic compound contains 4nπ electrons. Sign in Register; Hide. There are 7 questions on this exam. Rank the following dienes by rate of Diels-Alder reaction. The correct answer is Option B. What makes the following compound aromatic? The University of Texas at San Antonio. Everybody studying electrophilic substitution is likely to have met the nitration of benzene, but other parts of the Chemguide material on this topic may not be required by your syllabus. Which one of the following groups has highest - priority? All Rights Reserved. 0000003410 00000 n 4) and if both units are in the same molecule at the same time it is an obvious point of concern. )� �Ԝ�KNVZdc��Ce��`\d�+Onf����(��~0�VE���0��5ġ[�n�+��0�i8 gp �����prn�V�#�X�� �P#��5(��ш�����)Z�ӻ�zbS#��|=�)E3��Lf����Pf��gt��$~v��2����?�K�ϼ�N�H�2�Q��[!e�%� D��l�&k����}����X��f�|�0& (2 pts. In case 2, if the bond is broken in favor of oxygen, then the ring will become anti-aromatic which is highly unstable and the bond won’t be broken in that way. Share. When worked out will result in an integer from 0 to 9 (both inclusive) To make the given compound aromatic, we will remove an H+ from sp3 hybridized carbon atom to get 10 cyclic electrons (i.e. 9 - 12) This section contains 4 multiple choice questions. MCQ Multiple Choice Question on Polycyclic Aromatic Hydrocarbon Polycyclic Aromatic Hydrocarbon. electrons move around the periphery of the ring). A periodic table is provided at the end of the exam. No catalyst is needed for the reaction between Br, Which statement about the diazonium cation PhN, Under photolytic conditions, toluene reacts with Cl. endobj Direction (Q. Nos. The Submit Answers for Grading feature requires scripting to function. The reactivity of the benzene reflects the presence of carbon-carbon double bonds. Question 1 With respect to the electrophilic aromatic substitution of benzene which of the following is not true? Direction (Q. Nos. It is anti aromatic system with 8 s hence d option is wrong. This will maintain 4n+2 π electron and the molecule will remain as aromatic. Rank the following compounds in the trend requested.                                  = -149 kJ/mol. (15 points each) a. ΔHexp (benzene) = -3 × 119 = -357 (3C = C) endstream %��������� endobj Housecroft and E.C. The mechanism goes via an intermediate cation. Find out more, read a sample chapter, or order an inspection copy if you are a lecturer, from the Higher Education website. A periodic table is provided at the end of the exam. 3 0 obj The reaction of benzene with MeCl under Friedel-Crafts conditions leads to which of the following? 0000002405 00000 n Methylbenzene and 1,2-dimethylbenzene as the only products. Thus, rate of reaction of alkanes with halogens is  0000006501 00000 n Answer choices in this exercise appear in a different order each time the page. Match the substituent to the stated orientation and activation effects. Statement I : Benzene has very high stability than a general triene. << /Type /Page /Parent 7 0 R /Resources 3 0 R /Contents 2 0 R /MediaBox �1�}����ϧVрͭ�B-7�}�8�Ϗ�S�~��S��G՝�O�[,b��'e��#��KǨC2������θrs���ԸJ�Р�. :c�0�����,������ۏ��W9-ڕ������9N� Multiple choice questions. ∴ resonance energy = ΔHexp - ΔHcal The same case happens with option b and d. But with option c, there is no lone pair with Boron. Which of the following is the most likely to be the p. Which one of the following describes the mechanism of the reaction of aqueous NaOH with 2,4,6-trinitrochlorobenzene to form picric acid? But the double bonds are involved in aromaticity, so it won’t decolourise Bromine water. 9 0 obj << /Linearized 1 /O 11 /H [ 1115 230 ] /L 66896 /E 60286 /N 2 /T 66599 >> endobj xref 9 34 0000000016 00000 n Copyright © Oxford University Press, 2016. Question Points Possible 1 45 2 20 3 10 4 34 5 91 6 30 7 20 total 250. �Y ҍQ���j� V�u�����$~�2LޫG�`�^?u����Hp`5/Ǐh Course. When considering electrophilic aromatic substitution reactions the halides are described as Based on these information, resonance energy of benzene can be calculated to be, The correct answer is Option C. Direction (Q. Nos. 0000002185 00000 n So, it is a highly favorable case of double bond breaking. H�tT�n1��+t�ۚ����n�� �c.ɢ@��&E���_R��j�€-j�#�Zx�Ƀ�� J�(�Q�.��HR�'I� �J�*-�Y�L3�Ҙi�A3ρg����!�B�'�r�ib�� tr��� X9M��Qʉp �KLT�ϸ����3�Fǀ��;5�}��f3�vp5uM�+̥��Т[��7t�=/J��v�is�y�5�t�. 0000002426 00000 n 9 - 12) This section contains 4 multiple choice questions. trailer << /Size 43 /Info 7 0 R /Root 10 0 R /Prev 66590 /ID[<6431f43c81dada3545b3e2081545c4b5>] >> startxref 0 %%EOF 10 0 obj << /Type /Catalog /Pages 6 0 R /Metadata 8 0 R /PageLabels 5 0 R >> endobj 41 0 obj << /S 46 /L 131 /Filter /FlateDecode /Length 42 0 R >> stream Which set is, Which statement about the reactivity of toluene is. So option c is correct answer, I decomposes to give Br- and II gives Br+, I decomposes to give Br+ while II gives Br-. Constable. ----- 2. This mock test of Test: Aromaticity for Class 11 helps you for every Class 11 entrance exam.   Also, carbon becomes sp2 hybridized, so there is a chance of polarity. Benzene undergoes electrophilic substitution. A) I B) II C) III D) IV E) V 2. ��x����u7��uaԠ̷�c�B�0ȶ0Dz���X����.�>�nhi��޸����)�a���DI���5�*o�7��E�_l_�X��744Sc��hS�6�:U�nJ��ñ��"�m�ʍyh�+r6�2T[�X���02����.�.��N�7hg������;��? With which one of the following reagents does phenol react at 298 K and form a salt? long questions & short questions for Class 11 on EduRev as well by searching above. Summary of Electrophilic Aromatic Substitutions. With respect to the electrophilic aromatic substitution of benzene which of the following is not true? So that carbon has +ve charge and all the double bond will circulate in the ring. 0000001115 00000 n How many signals do you expect to see in the, Which statement about the reaction of benzene with Cl. All rights reserved. (4n+2 π electron is needed for aromaticity) What is the IUPAC name for isobutyl alcohol?

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