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Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 66. Question 66: [Inorganic Group 7]. Why is the addition of concentrated sulphuric acid to solid potassium iodide unsuitable for the preparation of hydrogen iodide? 1 Hydrogen iodide is not displaced by sulphuric acid. 2 Iodide ions are oxidised to iodine. 3 The product is contaminated by sulphur compounds. Past Exam Paper -June 2003 Paper 1 Q36. Statement 2 is true as H2SO4 displaces HI to H2S and I2 and H2O. Which ...

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Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 66. Question 66: [Inorganic Group 7]. Why is the addition of concentrated sulphuric acid to solid potassium iodide unsuitable for the preparation of hydrogen iodide? 1 Hydrogen iodide is not displaced by sulphuric acid. 2 Iodide ions are oxidised to iodine. 3 The product is contaminated by sulphur compounds. Past Exam Paper -June 2003 Paper 1 Q36. Statement 2 is true as H2SO4 displaces HI to H2S and I2 and H2O. Which ...

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2 atomic structure

3 chemical bonding

4 states of matter

5 chemical energetics

6 electrochemistry

7 equilibria

8 reaction kinetics

9 inorganic

10 period 3

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Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 66. Question 66: [Inorganic Group 7]. Why is the addition of concentrated sulphuric acid to solid potassium iodide unsuitable for the preparation of hydrogen iodide? 1 Hydrogen iodide is not displaced by sulphuric acid. 2 Iodide ions are oxidised to iodine. 3 The product is contaminated by sulphur compounds. Past Exam Paper -June 2003 Paper 1 Q36. Statement 2 is true as H2SO4 displaces HI to H2S and I2 and H2O. Which ...

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Chemistry Reference: 9701 MCQ Solution 58

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Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 58. Question 58: [Inorganic Nitrogen and Sulphur]. Which reagent, when mixed and heated with ammonium sulphate, liberates ammonia? B dilute hydrochloric acid. D acidified potassium dichromate(VI). Past Exam Paper -June 2003 Paper 1 Q18. Ca(OH)2 (NH4)2 SO4 = CaSO4 2NH3 2H2O. Include ONLY the reference. Comments will only be published after moderation. Subscribe to: Post Comments ( Atom ). 9701 MCQ Solution 80.

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Chemistry Reference: 9701 MCQ Solution 3

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Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 3. Question 3: [Physical Atomic Structure]. Use of the Data Booklet is relevant to this question. In the gas phase, aluminium and a transition element require the same amount of energy to form one mole of an ion with a 2 charge. What is the transition element? Past Exam Paper – November 2002 Paper 1 Q3. For aluminium to form an ion with a 2 charge we must add its 1. A Co: 757 1640 = 2397. B Cr: 653 1590 = 2243.

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Chemistry Reference: 9701 MCQ Solution 54

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Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 54. Question 54: [Physical Bonding]. Aluminium chloride catalyses certain reactions by forming carbocations (carbonium ions) with choloralkanes as shown. Which property makes this reaction possible? A AlCl3 is a covalent molecule. B AlCl3 exists as the dimer Al2Cl6 in the vapour. C The aluminum atom in AlCl3 has an incomplete octet of electrons. D The chlorine atom in RCl has a vacant p orbital. 9701 MCQ Solution 80.

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Chemistry Reference: 9701 MCQ Solution 10

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Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 10. Question 10: [Physical Chemical Energetics]:. At 600°C oxides of nitrogen react with un-burnt hydrocarbons in a catalytic converter in a car exhaust. The equation using methane as representative of a hydrocarbon molecule would be as follows. Which statement is likely to be true about the energy change of this reaction? A It is endothermic as heat energy is converted into chemical energy. Include ONLY the reference.

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Chemistry Reference: 9701 MCQ Solution 75

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Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 75. Question 75: [Inorganic Nitrogen and Sulphur]. Which statements are reasons why sulphur dioxide is used as a food preservative? 1 It is a reducing agent and therefore an anti-oxidant. 2 It prevents alcohols forming sour-tasting acids. 3 It does not smell and therefore can be used in more than trace quantities. Past Exam Paper -June 2003 Paper 1 Q35. Statement 3 is false because it does have a pungent smell.

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Physics 9702 Doubts | Help Page 181 | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Tuesday, July 28, 2015. Physics 9702 Doubts Help Page 181. Physics 9702 Doubts Help Page 181. Question 888: [Modern Physics Quantum Physics]. Fig1 gives information on three lines observed in the emission spectrum of hydrogen atoms. Photon energy / 10. Complete Fig.1 by calculating the photon energy for the wavelength of 486 nm. Fig2 is a partially completed diagram to show energy levels of a hydrogen atom. Energy E = hc /. Λ = (6.63×10. Rememb...

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Physical Quantities and Units | 9702 Physics Summary Notes | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Monday, August 10, 2015. Physical Quantities and Units 9702 Physics Summary Notes. 1 Physical Quantities and Units 9702 Physics Summary Notes. A physical quantity is made up of magnitude and unit. The following are base units:. All units (not above) can be broken down to base units. Homogeneity can be used to prove. An equation is homogenous if base units on left hand side are the same as base units on right hand side. Mass of a person. Types o...

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May 2015 | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Sunday, May 31, 2015. Physics 9702 Doubts Help Page 158. Physics 9702 Doubts Help Page 158. Question 782: [Current of Electricity]. In circuit shown, the resistance of the thermistor decreases as temperature increases. Which graph shows variation with Celsius temperature θ of potential difference V between points P and Q? Past Exam Paper – November 2013 Paper 13 Q37. V is the p.d. across the fixed resistor. Ohm’s law: V = IR. There are two mark...

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Sitemap | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Monday, December 17, 2012. You can find the links to all posts here. Physics 9702 (A-Level) Notes and Worked Solutions for Past Exam Papers. May be found here. A-Level to MCAT guide. Langevin`s Equations for Magnetization in Classical Fluid. Magnetization in fluid in Quantum Mechanical Case. Magnetic field (B-field) is always tangential to the surface of a Superconductor. Expression for Conductivity of ionized gas (plasma) at low pressure.

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Physics 9702 Doubts | Help Page 30 | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Sunday, November 30, 2014. Physics 9702 Doubts Help Page 30. Physics 9702 Doubts Help Page 30. Question 183: [Power Efficiency]. A train on mountain railway is carrying 200 people of average mass 70 kg up slope at angle of 30° to horizontal and at speed of 6.0 m s. Train itself has a mass of 80 000 kg. Percentage of power from the engine which is used to raise the passengers and the train is 40 %. What is power of the engine? 40% = 0.4. Diagram...

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February 2015 | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Friday, February 27, 2015. Physics 9702 Doubts Help Page 72. Physics 9702 Doubts Help Page 72. Question 389: [Current of Electricity]. Define potential difference (p.d.). Power supply of e.m.f. 240 V and zero internal resistance is connected to a heater as. Wires used to connect heater to the power supply each have length 75 m. Wires have a cross-sectional area 2.5 mm. And resistivity 18 nΩ m. Heater has constant resistance of 38 Ω. A = (18 x 10.

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9702 November 2013 Paper 43 Worked Solutions | A-Level Physics | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Saturday, August 1, 2015. 9702 November 2013 Paper 43 Worked Solutions A-Level Physics. 9702 November 2013 Paper 43 Worked Solutions A-Level Physics. Detailed explanations for this question is available as Solution 449 at Physics 9702 Doubts Help Page 86. Http:/ physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-86.html. Detailed explanations for this question is available as Solution 1042 at Physics 9702 Doubts Help Page 218. Expla...

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Physics 9702 Notes | Worked Solutions for Past Papers | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Monday, May 26, 2014. Physics 9702 Notes Worked Solutions for Past Papers. Physics 9702 (A-Level) Notes and Worked Solutions for Past Exam Papers. This page contains links to notes for the different chapters of the 9702 Physics syllabus (AS and A-Level) as well as worked solutions (explanations details) for past exam papers. You may clear any of your doubts at the respective pages. COMMENTS FROM VIEWERS WILL NO LONGER BE PUBLISHED ON THIS PAGE.

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Physics 9702 Doubts | Help Page 185 | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Saturday, August 8, 2015. Physics 9702 Doubts Help Page 185. Physics 9702 Doubts Help Page 185. Question 904: [Options Medical Physics Ultrasound]. Briefly explain the principles of generation. Time-base of the c.r.o. is 10 μs cm. Use Fig.1 to determine. I) thickness of the layer of fat given that the speed of ultrasound in fat is 1450ms. Ii) muscle thickness given that the speed of ultrasound in muscle is 1590ms. Trace length = 4.0 mm. 1cm rep...

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Types of Forces - Gravitational, Electric, Frictional, Viscous drag and Upthrust | Physics Reference

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YOUR PARTICIPATION FOR THE GROWTH OF PHYSICS REFERENCE BLOG. Sunday, November 16, 2014. Types of Forces - Gravitational, Electric, Frictional, Viscous drag and Upthrust. Types of Forces - Gravitational, Electric, Frictional, Viscous drag and Upthrust. In this post, we’ll try to look at a summarized explanation of some different types of forces, namely (as requested by one of the visitors) Gravitational force, Electric force, Frictional force, Viscous drag and Upthrust. Force may be described. All other f...

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Chemistry Reference

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 66. Question 66: [Inorganic Group 7]. Why is the addition of concentrated sulphuric acid to solid potassium iodide unsuitable for the preparation of hydrogen iodide? 1 Hydrogen iodide is not displaced by sulphuric acid. 2 Iodide ions are oxidised to iodine. 3 The product is contaminated by sulphur compounds. Past Exam Paper -June 2003 Paper 1 Q36. Statement 2 is true as H2SO4 displaces HI to H2S and I2 and H2O. Which ...

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