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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in solution with a deep voilet colour.Biuret H2NCONHCONH2 reacts with copper(11)ions in a basic solution to form a deep voilet complex. Xanthoproteic Test • The amino acids that contain benzene ring like tyrosine and tryptophan undergo nitration in this test and gives yellow colour. Millon’s Test • It is specific for tyrosine‚ the only amino acid that contain a phenol group on which a hydroxyl group is attached. It gives red precipitate. Hopkins_cole Test • It is specific
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which undergoes a rapid de-protonation by the base in the second step to restore aromaticity (Figure 3). E H E H + E+ E H fast E + HB+ B Figure 3. Some common electrophilic aromatic substitution reactions are: halogenation‚ nitration‚ sulfonation‚ Friedel-Crafts Acylation and Friedel-Crafts alkylation. These differ only in the Indian Institute of Technology Madras Engineering Chemistry III Prof. K. M. Muraleedharan nature and mode of generation of electrophiles‚
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and then allowed to cool. Reaction between the alcohol with the oxidizing agent will produce sodium salt (i.e sodium benzoate)‚ which on acidification with hydrochloric acid will produce benzoic acid. Objective To prepare benzoic acid from benzyl alcohol. Materials Sodium hydroxide‚ potassium permanganate‚ benzyl alcohol‚ concentrated hydrochloric acid‚ sodium sulphite‚ methyl orange solution‚ anti-bumping stone granules‚ Buchner funnel‚ 100 mL round bottom flask‚ and filter paper. Methods 1
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Scent-Infused Textiles consumer acceptance of fragrance-embedded textiles. Consumer willingness of finished products. The Sensory Perception Technologies (SPT) allows textile producers to weave particles of moisturisers‚ deodorants‚ fragrances and even anti-tobacco agents into fabrics. "Early trials have proved SPT a success with many global clothing companies interested‚" ICI‚ whose fragrances unit Quest developed the technology. ICI said the technology allows fabric makers to incorporate tiny
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Paracetamol - a curriculum resource Frank Ellis RSeC ROYAL SOCIETY OF CHEMISTRY Paracetamol - a curriculum resource Compiled by Frank E llis Edited by Colin Osborne and Maria Pack Designed by lmogen Bertin Published by the Royal Society of Chemistry Printed by the Royal Society of Chemistry Copyright 0 Royal Society of Chemistry 2002 Registered charity No. 207890 Apart from any fair dealing for the purposes of research or private study‚ or criticism or review‚ as permitted under
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MARKETING REPORT Oral Care Market(India)-Mouthwash Submitted by-NISHMA VERMA 8/24/2012 This report deals with oral market of India especially the mouthwash sector. the various aspect of marketing and research and development of mouthwash product are discussed in detail. INTRODUCTION (COSMETIC MARKET) According to to a research RNCOS industrial research-The rising beauty concerns among both men and women are propelling the Indian cosmetics industry‚ which has witnessed a strong growth in
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Table 16.1. Aspartame 100 Saccharin 550 Sucrolose 600 Alitame 2000 Table Table 16.1: Artificial Sweeteners Aspartame is the most successful and widely used artificial sweetener. It is roughly 100 times as sweet as cane sugar. It is methyl ester of dipeptide formed from aspartic acid and phenylalanine. Use of aspartame is limited to cold foods and soft drinks because it is unstable at cooking temperature. Alitame is high potency sweetener‚ although it is more stable than aspartame
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CHEMISTRY (Theory) Time allowed : 3 hours General Instructions: (i) All questions are compulsory. Maximum Marks : 70 (ii) Marks for each question are indicated against it. (iii) Question numbers 1 to 8 are very short-answer questions and carry 1 mark each. (iv) Question numbers 9 to 18 are short-answer questions and carry 2 marks each. (v) Question numbers 19 to 27 are also short-answer questions and carry 3 marks each. (vi) Question numbers 28 to 30 are long-answer questions and carry 5 marks
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Explosives A chemical explosive is a compound or a mixture of compounds susceptible of a rapid chemical reaction causing a quick physical outburst of gases or heat radiation. The first explosives were created by the Chinese in the 11th century. These were mixtures of nitrate salts‚ sulfur and charcoal‚ now known as black powder. Gunpowder which is a low explosive‚ exhibits deflagration‚ or rapid burning‚ rather than detonation‚ the reaction exhibited by high explosives. While‚ perhaps counterintuitively
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