When worked out will result in an integer from 0 to 9 (both inclusive) �;�����6*�@��8�������7�/���0%���K���=OaP-�o�o�3x� Direction (Q. Nos. Here the options A and D are anti-aromatic. Direction (Q. Nos. How many bromine molecules, when added to this molecule, would make it stable and prevent further bromine addition?                                         = -357 + 208 An aromatic dication is formed, the no of  s become 6 thus it obeys 4n+2 rule hence it is aromatic and highly stable. 0000008499 00000 n [0 0 612 792] >> The reaction of benzene with MeCl under Friedel-Crafts conditions leads to which of the following? With respect to the electrophilic aromatic substitution of benzene which of the following is not true? methoxy) are described as: With respect to the electrophilic aromatic substitution of benzene which of the following is not true: Which of the following drugs does not contain an aromatic species? Multiple choice questions. 0000002426 00000 n �1�}����ϧVрͭ�B-7�}�8�Ϗ�S�~��S��G՝�O�[,b��'e��#��KǨC2������θrs���ԸJ�Р�. Based on these information, resonance energy of benzene can be calculated to be, The correct answer is Option C. A) I B) II C) III D) IV E) V 2. Anti-aromatic compound contains 4nπ electrons. 0000008359 00000 n The Submit Answers for Grading feature requires scripting to function. It exists mainly as dipolar ion with +ve charge in the three membered ring while -ve charge in five membered ring, It exists mainly as dipolar ion with -ve charge in the three membered ring and +ve charge in five membered ring, In solution it shows very high electrical conductivity. Enthalpy of hydrogenation of cyclohexene is -119 kJ/mol and that of benzene is -208 kJ/mol. Which is the most probable main product of the following reaction ? In compound II, Br will dispatch as Br-. endobj Which of the following is a secondary (2°) alcohol? total) A. Please do not forward your results unless your lecturer has specifically requested that you do so. endobj What is a correct name for (CH 3) 3CO – Na+?? NCERT Textbook - Mechanical Properties of Solids, Test: Features Of Living Beings, Diversity In The Living World, Test: Biological Classification 1 - From Past 28 Years Questions, Test: Aromaticity And Acid Base Properties. Answer choices in this exercise appear in a different order each time the page. %PDF-1.3 Which of the following species is/are anti-aromatic? You should use this opportunity to get some background on the well known drugs listed. What is a correct name for (CH 3) 3CO – Na+?? endobj Which one of the following groups has highest - priority? organicmystery. 3. 0000007757 00000 n Housecroft and E.C. For each question there is one correct answer. In which answer are the alcohols arranged from most acidic to least acidic? protonation of the. A periodic table is provided at the end of the exam. ΔHcal (benzene) = -208 KJ/mol Types of reactions: There are limited electrophiles that are strong enough to react with an aromatic ring. (E) None of them gives substitution products For SN2, the nucleophile has to attack from the back of the leaving group. �(�o{1�c��d5�U��gҷt����laȱi"��\.5汔����^�8tph0�k�!�~D� �T�hd����6���챖:>f��&�m�����x�A4����L�&����%���k���iĔ��?�Cq��ոm�&/�By#�Ց%i��'�W��:�Xl�Err�'�=_�ܗ)�i7Ҭ����,�F|�N�ٮͯ6�rm�^�����U�HW�����5;�?�Ͱh Rank the following compounds in the trend requested. Furan has resonance energy comparable to benzene. 8 0 obj Reactivity x�}�OHQǿ�%B�e&R�N�W�`���oʶ�k��ξ������n%B�.A�1�X�I:��b]"�(����73��ڃ7�3����{@](m�z�y���(�;>��7P�A+�Xf$�v�lqd�}�䜛����] �U�Ƭ����x����iO:���b��M��1�W�g�>��q�[ When two or more different substituents are attached with a benzene ring the number 1 position in the ring is given to a high priority group. Direction (Q. Nos. A) sodium alkoxide %��������� 0000001764 00000 n Integrated Foundations of Pharmacy Series, Barber & Rostron: Pharmaceutical Chemistry. Question Points Possible 1 45 2 20 3 10 4 34 5 91 6 30 7 20 total 250. What makes the following compound aromatic? So that carbon has +ve charge and all the double bond will circulate in the ring. Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I, Statement I is incorrect but Statement II is correc. 9 - 12) This section contains 4 multiple choice questions. I2 < Br2 < Cl2 ] >> 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 :c�0�����,������ۏ��W9-ڕ������9N� 0000005225 00000 n There are 7 questions on this exam. 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? 2 0 obj A) 1-butanol B) 2-butanol C) 2-methyl-2-butanol D) 2-methyl-1-propanol 3. xڕ�1O�0����'��C[DZ�[��R�%�\���8 ��؉`�ReY>��������A�*� Oh�9���+B��� PJ��q��V��b�T@����k���ű�ڸ��O�\B�"�������������4/����iѯ������9-��k��HR��ɜ�p���W�8��~�"� �� Arrange the halogens F2, Cl2, Br2, I2 in order of their increasing reactivity with alkanes. It delcolourises purple colour of cold, dilute, alkaline KMnO4 (Baeyer’s reagent), It decolourises brown colour of Br2 - H2O solution, It is absorbed in cold, concentrated H2SO4 solution. Helpful? 0000004531 00000 n So ring will become aromatic. stream 0000002405 00000 n Theoretically they are the same molecules, Both have same lengths of all of their C — C bonds, Cyclohexatriene has three different C - C bond lengths while benzene has only one type of C — C bond length whose value is between those of cyclohexatriene. 0000003410 00000 n 0000005844 00000 n How many signals do you expect to see in the, Which statement about the reaction of benzene with Cl. Your browser either does not support scripting or you have turned scripting off. 3 0 obj 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. students definitely take this Test: Aromaticity exercise for a better result in the exam. What is the IUPAC name for isobutyl alcohol? (4n+2 π electron is needed for aromaticity) Therefore, the order of polarity: - III>I>II. each, 30 pts. 0000001345 00000 n endstream Copyright © 1995-2010 Pearson Education. 0000059852 00000 n 1. 2017/2018. �a��G�t�>X�ƂM�m�{�ㆻ�QhN����[��x�B�3�����c��;V�gk�}߭Q�X��\��-]Ƭ�~� 6KR�,&Y�;�)�ˣ#Ǫq��)�c�*r�B��"��)eB� 0000007101 00000 n The mechanism goes via an intermediate cation. Your browser either does not support scripting or you have turned scripting off. 0000001025 00000 n 1,2-Dimethylbenzene and 1,4-dimethylbenzene as the only products. All Rights Reserved. The same case happens with option b and d. But with option c, there is no lone pair with Boron. Circle the best answer for each question. EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. (3 pts. When potassium metal is added to 1, 3, 5, 7-cyclooctatetraene, a highly conducting salt is formed without evolution of H2 gas because, reduction of cyclooctatetraene into anionic. << /ProcSet [ /PDF /Text ] /ColorSpace << /Cs1 5 0 R >> /Font << /F1.0 4 0 obj Friedel-Crafts alkylation and acylation reactions are very similar both in terms of the conditions for the reactions and the mechanisms. Cyclobutene when refluxed in presence of potassium metal, evolve hydrogen gas and an aromatic system is formed. What is the IUPAC name for isobutyl alcohol? electrons move around the periphery of the ring). 1 - 8) This section contains 8 multiple choice questions. 6 0 R >> >> Because of this, the answer choices will NOT appear in a different order each time the page is loaded, though that is mentioned below. 4 0 obj %PDF-1.3 Q. a�)B��Ь��KdJ��G�.��]SnJ�H��B�)�_�>eJH� �p��V�*}E/l--�����(�����. each) A. 0000003197 00000 n The correct answer is Option D.

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