1 Class XII Chemistry Ch 5: Surface Chemistry Chapter Notes Top Concepts / Key learnings: 1. 2. 3. 4. 5. 6. Adsorption: The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed as adsorption. Adsorbate: The substance which is being adsorbed on the surface of another substance is called adsorbate. Adsorbent: The substance present in bulk‚ on the surface of which adsorption is taking place is called adsorbent. Desorption: The process of removing an
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Chemistry 12 Unit 1 - Reaction Kinetics Chemistry 12 Worksheet 1-3 - Reaction Mechanisms 1. It is known that compounds called chlorofluorocarbons (C.F.C.s) (eg. CFCl3) will break up in the presence of ultraviolet radiation‚ such as found in the upper atmosphere‚ forming single chlorine atoms: CFCl3 CFCl2 + Cl The Cl atoms then react with Ozone (O3) as outlined in the following mechanism. Step 1: Step 2: Cl + O3 ClO + O2 ClO + O Cl + O2 (single "O" atoms occur naturally in the atmosphere
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The Sand Creek Massacre and the Massacre of My Lai The Sand Creek massacre refers to the killings and post-mortem mutilations of many members of the southern band of Cheyennes led by Black Kettle and the band of Arapahoes led by Left Hand at Sand Creek in Colorado on and after November 29‚ 1864. The number of those killed numbered from 100 to 500 within these materials. Some witnesses‚ such as John Smith‚ and others claimed that most of the victims were women and children‚ but others‚ such as John
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the sun with your beautiful vacation rental condo just a few short feet away. Sugar Sands Realty & Management is host to more than 200 beach homes and condo rentals on the beach in beautiful Orange Beach‚ Alabama‚ on the Gulf Coast. With March just around the corner‚ you’ll want to make sure there’s room enough for the whole team during the March USSSA baseball and softball tournaments happening. Luckily‚ Sugar Sands Realty & Management Inc. has you covered. With two five-story buildings that house
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Food Chemistry: Option F Food Groups: F.1 Food & Nutrients Food: any substance‚ whether processed‚ semi-processed or raw‚ which is intended for human consumption‚ and includes drinks‚ chewing gum and any substance which has been used in the manufacture‚ preparation or treatment of “food” but does not include cosmetics or tobacco or substances used only as drugs. Nutrients: any substance obtained from food and used by the body to provide energy‚ to regulate growth‚ and to maintain and repair
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CM5121 Graduate Organic Chemistry General Administration Matters Dr. Zhang Sheng Office no: S7-03-12 Email: chmzs@nus.edu.sg CM5121 Assessments CA (quiz‚ project) 50% Final Exam (Closed Book) 50% CA: choose 2 out of 3 Quiz 1 (Week 7‚ closed book) 25% Quiz 2 (Week 11‚ closed book) 25% Project Presentation 25% (Week 11-13) 2 Syllabus Broadly divided into 2 parts: 1) Pericyclic Reactions i) Electrocyclic ii) Cycloaddition and cycloreversion iii) Sigmatropic 2) Rearrangements
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CHEMISTRY PROJECT :AIM: TO COMPARE RATE OF FERMENTATION OF GIVEN SAMPLE OF WHEAT FLOUR‚GRAM FLOUR‚RICE FLOUR AND POTATO. SUBMITTED BY :- NAME: Shreyas kelkar CLASS:XII A ROLL NO: 26 INDEX # AIM # CERTIFICATE # ACKNOWLEDGEMENT # DECLARATION # OBJECTIVE # INTRODUCTION # MATERIALS REQUIRED # PROCEDURE # OBSERVATIONS # BIBLIOGRAPHY CERTIFICATE This is to certify that this project is submitted by SHREYAS KELKAR to the chemistry department‚ KENDRIYA VIDYALAYA NO. 1‚ INDORE was carried out
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Chemistry and cosmetics Cosmetics have been around since almost the beginning of time. Egyptian women used kohl to darken their eyelids‚ Cleopatra was even said to have bathed in milk to achieve a soft smooth completion. In Greece‚ women used lead carbonate (a white powder) to obtain a pale complexion‚ which probably wasn’t worth it seeing how it cost them their lives! Anyway‚ cosmetics are no modern phenomenon! Today it is a big business‚ making about $12 billion
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The oil sands are located within one of the world’s most admired democracies and they represent the largest source of crude oil directly available to the North American Market (pg. 24). The dream of recovering oil from the Alberta bitumen on a commercial basis was born in 1900s‚ when John Rockefeller was building Standard Oil‚ that is now known as ExxonMobil. Over the years‚ many companies took interest‚ and Sun Oil‚ began processing bitumen from the oil sands in 1967 (pg. 3). Suncor’s parent company
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The Sand Creek Massacre was a horrifying catastrophe that occurred on November 29‚ 1864 about forty two miles away from Fort Lyon Colorado. The Native American Indians were attacked in their peaceful village by 7 hundred men of the Colorado Territory militia‚ who were lead by Colonel John M. Chivington. It became one of the most abominable Indian wars. A few years before the massacre it was believed that the Indians could cause us harm however‚ that wasn’t the situation and it is now reflected over
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