INORGANIC CHEMISTRY – CLASS XI (ISC) Properties of Group 1 elements [Alkali metals] 1. Due to high reactivity‚ alkali metals do not occur free in nature. Elements of group 1 (or IA) are known as alkali metals because their hydroxides are soluble in water and form strongly alkaline solutions. Alkali metals are stored under kerosene oil because they get tarnished on exposure to air. 2. The general electron configuration of alkali metals is ns1. 3. Alkali metals have largest size and lowest
Free Periodic table
has the smallest radius? 13) ______ A) Li + B) Li - C) Li D) Li2- 14) What is the most likely formula for a compound consisting of Sr and Se? 14) ______ A) SrSe3 B) Sr2Se C) SrSe D) SrSe2 15) How many “dots” would be around the central atom in the Lewis structure of S? 15) ______ A) 5 B) 6 C) 7 D) 4 16) What volume of a 12.0 M HCl solution is needed to provide 0.6 mol of HCl? 16) ______ A) 12 mL B) 50 mL C) 5 mL D) 50 mL 17) Which is the strongest acid in aqueous
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substituent = 4). Place the number in the blank below the substituent. (a) (b) 3. Determine the relationship between each of the following pairs of structures (enantiomers‚ diastereomers‚ constitutional isomers‚ or identical). (a) (b) (c) (d) 3. Which of the following structures is different from the other three? Explain. 4. (a) Place asterisks at all of the asymmetric carbon atoms in the molecule shown below (prostacyclin)
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Chemistry in the Movies Assignment (25 Points Extra Credit) This project will explore the public perception of chemistry. Each participating student will analyze a movie. Movies may be selected from the list on the following page or the student may find analyze any other academically acceptable movie with a chemist or chemical theme. All reviews will use academically acceptable language‚ spelling‚ and grammar and be 400 words minimum. For each movie‚ the student
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Combustion of Acetylene (ethyne) Rx: Back Why I don’t do acetlyene explosions in our lab.... Combustion of alkanes A quick review.... • Combustion reactions of alkanes consist only of C and H (hydrocarbon) • require O2(g) as a reactant • produce CO2(g) and H2O(g) and a large amount of energy!! Oxygen can be the limiting reagent which can lead to Incomplete combustion. For complete combustion of a hydrocarbon‚ oxygen must be in excess. If there isn’t sufficient oxygen‚ incomplete combustion occurs
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money to see the company through the first few years of trading until sales caught up with operating expenses. Such capital ceased to be available for all practical purposes in the second quarter of 2000 following dramatic falls in the "dot crash" following the Dot-com bubble. Boo would probably have failed for this reason even if the user experience had been excellent and the launch on schedule. Problems with the user experience The presentation of products and content on their site were both
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Analytical chemistry Analytical chemistry is the branch of chemistry that deals with the separation‚ identification and determination of components in a sample. Analytical chemistry can be divided into two branches‚ qualitative and quantitative. Qualitative analysis It deals with the identity of the constituents that are in an analytical sample. Quantitative analysis It deals with the determination of how much of a given substance is in the sample. The quantitative analyses are classified
Free Atom
the empirical formula of the compound. (ii) What other piece of data is required to deduce the molecular formula from the empirical formula? (iii) If the molecular formula of the compound is the same as the empirical formula‚ draw two possible structures of the compound. (Total 6 marks) 3. (a) Compound A (Mr = 215.8) contains 22.24% carbon‚ 3.71% hydrogen and 74.05% bromine by mass. Show that the molecular formula of A is C4H8Br2. (3) (b) There are nine structural isomers of molecular formula
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ABORIGINAL ART THE DOT MYTH Jabit June 2012 Contents ABORIGINAL ART – THE DOT MYTH 3 Explain how the above has evolved and where dot art has come from 3 Aboriginal Art: Traditional to Contemporary 4 Research 5 When 5 Where 5 Who 6 Why the modern aboriginal “dot art” movement started? 6 Geoffrey Bardon 6 The Honey Ant Mural‚ July 1971 7 Pintupi people from the Western Desert 7 Diversity within “dot art” - showing two different artists works. 8 Uta Uta Tjangala - Traditional
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Appendix APPENDIX 1 Chemical tests for functional groups Homologous series/ Typical compound Functional group(s) Alkanes CH3CH3 ethane C – C and C–H Alkenes CH2 = CH2 ethene C=C Chemical tests/Observations Add liquid bromine in ultraviolet light (or sunlight): White fumes of HBr liberated; decolourisation of bromine occurs slowly (a) Add Br2 in CCl4 at room temperature: Decolourisation of bromine occurs immediately CH2 = CH2 + Br2 → CH2BrCH2Br (b) Add acidified
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