Free PDF Download of CBSE Chemistry MCQs for Class 12 with Answers Chapter 10 Haloalkanes and Haloarenes. Heterocyclic compounds can be usefully classified based on their electronic structure. But this does not prevent a compound such as borazine (which has no carbon atoms) from being labelled "heterocyclic". Choose from the following structures. Ring A should include an aromatic or heteroaromatic ring for binding with 5-phenyl-1,4-benzodiazepin-2-one derivatives. Which of the diagrams below correctly identify the nature of the two edges? Question No : 2 She stood on tip-toe. When Heterocycles used as ring A, drug shows poor pharmacological activity. Question No : 3 India will win the World cup. 1997. Borazine is a six-membered ring with three nitrogen heteroatoms and three boron heteroatom. The origin of the carbon and the nitrogen atoms of the purine ring system, determined by John Buchanan using isotopic tracer experiment. 7-Chloro-5-(2-chlorophenyl)-3-hydroxy-1,3-dihydro-1,4-benzodiazepin-2-one, C. 7-Chloro-2-methylamino-5-phenyl-3H-1,4-benzodiazepine-4-oxide, D. (S)-(+)-6-(5-Chloro-2-pyridinyl)-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-yl-4-methyl-1-piperazinecarboxylate.

Likewise, the compounds with two benzene rings fused to the central heterocycle are carbazole, acridine, and dibenzoazepine. Included are pyridine, thiophene, pyrrole, and furan.

She reached for the mangoes on tree. Those containing one heteroatom are, in general, stable. What is the mechanism of action of Azithromycin?

i. Biology Multiple Choice Questions and Answers for Different Competitive Exams. A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of its ring(s). (b) 2, 3-Dimethylbutane The history of heterocyclic chemistry began in the 1800s, in step with the development of organic chemistry. (b) nitric acid on chlorobenzene. A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of its ring(s). A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of its ring(s).

That is certain.

SN1 reaction of alkyl halides lead to (d) Allyl bromide, 7. The unsaturated rings can be classified according to the participation of the heteroatom in the conjugated pi system. (a) Retention of configuration Minocycline is a tetracycline that has a broader range of activity than older tetracyclines, including activity against tetracycline resistant strains that are resistant because of efflux pumps. (d) None of these.

Q.5 When there is substitution at the ortho position of the ring C of Lorazepam-, a) No change observed in agonist property, d) Agonist property increases by !.5-fold. PG Diploma in Advance Clinical Research 2020, Training Opportunities for Pharmacy Professionals, NIPER JEE Examination (Masters/Ph.D. Analogs of the previously mentioned heterocycles for this third family of compounds are acridine, dibenzothiophene, carbazole, and dibenzofuran, respectively. On aetylation on secondary nitrogen using acetic anhydride, followed by hydrolysis by hydrochloric acid give 7-chloro-5-(2’-chlorphenyl)-1,2-dihydro-3H-1,4-benzodiazepin-2-on-4-oxide (5). 4- c) Proteins, RNA and antibodies have catalytic activity. Students can solve NCERT Class 12 Chemistry Haloalkanes and Haloarenes MCQs Pdf with Answers to know their preparation level. Derivatives having the 3-hydroxy moiety are fast excreted. Answer the following questions and then press 'Submit' to get your score. There is no effect on agonist activity, but the antagonist activity dereases when methylene 3-position or imine nitrogen of the ring B is substituted. Which of the following structures represents the correct labelling system of tetracyclines?

The saturated heterocycles behave like the acyclic derivatives. Multiple Choice Questions (MCQ) Students can solve NCERT Class 12 Chemistry Haloalkanes and Haloarenes MCQs Pdf with Answers to know their preparation level. Another large class of heterocycles refers to those fused to benzene rings. Increase the Binding of GABA to the GABAA receptors, III. i. Lorazepam binds allosterically with the benzodiazepine receptor present in the post synaptic GABAA at different sites in CNS. Free PDF Download of CBSE Chemistry MCQs for Class 12 with Answers Chapter 10 Haloalkanes and Haloarenes. A proton-accepting group is essential on Ring B for binding with GABA. Identify X and Y in the following sequence, (a) X = KCN, Y = LiAlH4 CS1 maint: multiple names: authors list (, "IPEXL.com Multilingual Patent Search, Patent Ranking", Heterocyclic amines in cooked meat, US CDC, List of known and probable carcinogens, American Cancer Society, List of known carcinogens by the State of California, https://en.wikipedia.org/w/index.php?title=Heterocyclic_compound&oldid=990200108, Short description is different from Wikidata, Articles with unsourced statements from September 2019, Creative Commons Attribution-ShareAlike License, This page was last edited on 23 November 2020, at 10:42.

Q.4 Correct sequence for True/false for the classification of the drug can be? The hypothetical compound with six nitrogen heteroatoms would be hexazine. (d) All of these are correct reasons. Chloropicrin is formed by the reaction of Autotrophic Nutrition / Photosynthesis MCQ 1. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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