by : Directorate of Education‚ Delhi SOME IMPORTANT REASONING BASED QUESTIONS OF ORGANIC CHEMISTRY 1. Chlorobenzene is less reactive than chloromethane. Ans. In chlorobenzene‚ each carbon atom of benzenering is sp2 hyridised and is electron withdrawing. Chlorine atom donates a lone pair of electron and acquire positive charge. The negative charge is delocalised on ortho and para position by resonance. C-Cl bond acquires partial double bond character and is 169 pm as compared to 17.0 pm in chloromethane
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Introduction Summer Mall is the first Shopping Mall open in the area which was developed by Tetap Majumas Sdn Bhd. The three-storey landmark building covering 800‚000 square feet build on the mixed development of residential‚ commercial and education hub of Kota Samarahan looking forward to cater over 300‚000 population of the area. With “Everything Under One Roof” concept‚ the mall is an integrated development comprising over 335 retail lots with a wide range of trade mix including fashion & lifestyle
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2.1 History: A person called Walter E. Diemer‚ was an accountant for the Fleer Chewing Gum Company during the year 1928. The company which was located in Philadelphia‚ was experimenting with new gum recipes. One recipe was found and that recipe was less sticky and can be stretched more easily when compared to the regular chewing gum. This chewing gum became highly successful and was named by the president of Fleer as Dubble Bubble because of its stretchy texture. The original bubble gum was pink
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African Journal of Pharmacy and Pharmacology Vol. 6(14)‚ pp. 1064 - 1068‚ 15 April‚ 2012 Available online at http://www.academicjournals.org/AJPP DOI: 10.5897/AJPP12.022 ISSN 1996-0816 ©2012 Academic Journals Full Length Research Paper Synthesis and evaluation of chalcone analogues and pyrimidines as cyclooxygenase (COX) inhibitors Syed Nasir Abbas Bukhari1*‚ Waqas Ahmad1‚ Adeel Masood Butt1‚ Naveed Ahmad1‚ Muhammad Wahab Bin Amjad1‚ Muhammad Ajaz Hussain2‚ Viresh H Shah3 and Amit R Trivedi3
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[19593 Organic Chemistry of the Tramition Elements. Part r. View Online 551 Downloaded by University of Washington on 01 February 2011 Published on 01 January 1959 on http://pubs.rsc.org | doi:10.1039/JR9590000551 113. The Organic Chemistry of the Transition Elements. Part I. Tricarbonylchromium Derivatives of Aromatic Compounds. By B. NICHOLLS M. C. WHITING. and Many aromatic compounds‚ ArH‚ displace carbon monoxide from chromium hexacarbonyl with the formation of complexes Cr(CO)
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on chromium III. Problems based on zinc IV. Problems based on silver V. Problems based on gold Carbonyl compounds I. Problems based on acetaldehyde and acetone II. Problems based on benzedehyde III. Problems based on benzophenone & acetophenone Electro Chemistry - I Page No. www.kalvisolai.com 5 Mark Compulsory Problems with Solution 16. Hydroxy Derivatives 8 Q. No. 70 A Hydroxy derivatives problems are classified into aliphatic group and aromatic group. The aliphatic problem
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NPTEL – Chemistry – Reagents and Organic reactions Module II Lecture 14 Reduction Reactions 2.1.1 Lithium Aluminum Hydride (LAH) 2.1.1.1 Introduction Lithium aluminum hydride (LAH) is a strong reducing agent with chemical formula LiAlH4. It can reduce a variety of functional groups such as aldehydes‚ esters‚ acids‚ ketones‚ nitriles‚ epoxides and azides. It vigorously reacts with water and all the reactions are performed in polar aprotic solvents. 2.1.1.2 Preparation It was first
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Introduction to Alkane Nomenclature A. Determining the Priority of Functional Groups. What’s in a name? 3-ethyl-5-(1-methylpropyl)-4‚4-dimethylnonane Too big a subject to cover on one sheet! This paper will focus on alkanes. Determining functional group priority will be the subject of a subsequent sheet. suffix http://masterorganicchemistry.com D. Applying the Lowest Locator Rule F. Dealing With Branched Substituents (the IUPAC Way) Number the chain from one end so as
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Chapter 1 MULTIPLE CHOICE QUESTIONS Topic: Atomic Orbitals 1. A) B) C) D) E) In quantum mechanics a node (nodal surface or plane) is: a place where Ψ is negative. a place where Ψ is positive. a place where Ψ = 0. a place where Ψ2 is large. a place where Ψ2 is negative. Ans: C Topic: Atomic Orbitals‚ Molecular Orbitals 2. When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule‚ how many molecular orbitals are formed? A) 1 B) 2 C) 3 D) 4 E) 5 Ans:
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Application of Semiconductor Nanomaterials in Catalysis and Medical Sciences A Scientific Document submitted to National Center for Catalysis Research Indian Institute of Technology‚ Chennai for 10th Catalysis orientation programme-2009 By N.THILLAI SIVAKUMAR [pic] Discipline of Inorganic Materials and Catalysis Central Salt and Marine Chemicals Research Institute Council of Scientific and Industrial Research (CSIR) GB Marg‚ Bhavnagar – 364 002 Gujarat‚ India CONTENTS
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