1. (a)Correct the following statements. (i) The melting points of crystalline and amorphous solids are not definite. The melting point of an amorphous solid is not definite. OR The melting point of a crystalline solid is definite. P Ps X solute . Ps P Ps The equation for relative lowering of vapour pressure when solute remains normal is X solute P (iii)The degree of ionization decreases with dilution. The degree of ionisation increases with dilution. (iv) Tertiary butyl halide
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15. Benzene and Aromaticity • C-Phen DM Drops (Chlorpheniramine/Dextromethorp/Phenylephrine) • This combination medication is used to treat symptoms caused by the common cold‚ flu‚ allergies‚ hay fever‚ or other breathing illnesses (e.g.‚ sinusitis‚bronchitis). • One of the active ingredients is Phenylephrine –a decongestant that helps relieve stuffy nose symptoms. H HO OH H N CH3 . HCl What is the configuration at this chirality center? R or S ? www.primaryrx.com/pdf/C-PHEN%20DM%20DROPS
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Choose one of the following models of psychosynthesis: (a) subpersonalities‚ (b) ‘I’ and the sense of identity‚ (c) the egg diagram. Discuss and critique its usefulness as a tool for understanding your own development and its possible application to clinical work. This essay will choose to discuss model (b) ‘I’ and the sense of identity‚ particularly in relation to the work of John Firman. This essay aligns with the definitions of “I” and Self as outlined by Assagioli (1965)‚ that “I” is one’s
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The traditional TOK diagram indicates four ways of knowing. Propose the inclusion of a fifth way of knowing selected from intuition‚ memory or imagination‚ and explore the knowledge issues it may raise in two areas of knowledge. Our whole life is a continuous process of gaining information. This information is our basic knowledge about the world. It is coming in different forms‚ from different sources. And it is vitally important to store this information‚ in order to understand your own present
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Hwa Chong Institution (High School) Secondary 4 End of Year Examinations Chemistry Revision Notes List of topics: 1. Atomic Structure 2. Separation Techniques 3. Chemical Bonds and Bonding (Ionic‚ Covalent) 4. Metals 5. Properties and structures of compounds 6. Qualitative Analysis 7. Acids‚ Bases and Salts 8. Chemical Periodicity 9. Chemical Calculations 10. Air and Environment 11. Electrochemistry (Including Redox reactions) 12. Thermochemistry 13. Rates of Reaction 14. Chemical
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Chemistry Exam Study Sheet Organic Chemistry • Study of compounds to which carbon is the principal element. • Carbon is special because it has 4 bonds. Functional Groups • Organic substances are organized into organic families. • Organic Families – group of organic compounds with common structural features. o Each family has a recognizable physical property and a specific structural arrangement. o Each combination is referred to as a functional group. o Even
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Question: Explain how human activities can interrupt or modify the nutrient cycles in the coniferous forest. Refer in detail to examples you have studied. Attempt to show as annotated diagrams the altered minerals nutrient cycle. Essay: The coniferous forest occurs in cold climates to the poleward side of 60 N in Eurasia and North America as well as high attitudes in more temperate latitudes and in Southern Chile. It has an average NPP of 800g/m/yr. There is usually only one layer of vegetation
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detrerminant corresponding to the pi-bonding in C8H8. b) Using the secular determinant‚ the following energies are found for the pi-bonding molecular orbitals: 1 = + 2 2 = + 1.41 (two states) 3 = (two states) 4 = - 1.41 (two states) 5 = - 2 Give the electron configuration for the pi-bonding for the ground state of C8H8. c) What is value for S (total spin quantum number) for the ground state of C8H8. d) What is E‚ the pi-bonding energy‚ for the ground state of C8H8
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9.1 Orbitals and Theories of Chemical Bonding 1. Which one of the statements concerning valence bond (VB) and molecular orbital (MO) bond theories is correct? a) MO theory predicts that electrons are localized between pairs of atoms. b) In VB theory‚ bonding electrons are delocalized over the molecule. c) MO theory accurately describes bonding in O2 and NO‚ VB theory does not. d) VB theory can describe molecular bonding in excited states. e) MO theory is used to accurately predict
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LEARNING OBJECTIVES 1. Explain the motives for holding money and relate them to the interest rate that could be earned from holding alternative assets‚ such as bonds. 2. Draw a money demand curve and explain how changes in other variables may lead to shifts in the money demand curve. 3. Illustrate and explain the notion of equilibrium in the money market. 4. Use graphs to explain how changes in money demand or money supply are related to changes in the bond market‚ in interest rates‚
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