physics-ref.blogspot.com

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 58

http://chemistry-ref.blogspot.com/2015/07/9701-mcq-solution-58.html

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.

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 40

http://chemistry-ref.blogspot.com/2015/06/9701-mcq-solution-40.html

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 40. Organic Carbonyl Compounds] :. In the reaction between an aldehyde and HCN catalysed by NaCN, which statements about the reaction mechanism are true? A new carbon-carbon bond is formed. In the intermediate, the oxygen carried a negative charge. The last stage involves the formation of a hydrogen-oxygen bond. Past Exam Paper – November 2002 Paper 1 Q40. Attacks then the remaining ions (H. Include ONLY the reference.

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 76

http://chemistry-ref.blogspot.com/2015/08/9701-solution-66.html

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 76. Question 76: [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.

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 74

http://chemistry-ref.blogspot.com/2015/08/9701-solution-64.html

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 74. Question 74: [Physical Chemical Bonding]. Which of the following statements are correct for the sequence of compounds below considered from left to right? NaF MgO AlN SiC. 1 The electronegativity difference between the elements in each compound increases. 2 The formula-units of these compounds are isoelectronic (have the same number of electrons). 3 The bonding becomes increasingly covalent. 9701 MCQ Solution 80.

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 56

http://chemistry-ref.blogspot.com/2015/07/9701-mcq-solution-56.html

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 56. Question 56: [Physical Electrochemistry]. Chlorine compounds show oxidation states ranging from –1 to 7. What are the reagent(s) and conditions necessary for the oxidation of elemental chlorine into a compound containing chlorine in the 5 oxidation state? A AgNO3(aq) followed by NH3(aq) at room temperature. B concentrated H2SO4 at room temperature. C cold dilute NaOH(aq). D hot concentrated NaOH(aq). 1 x (-6) = 0.

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 60

http://chemistry-ref.blogspot.com/2015/07/9701-mcq-solution-60.html

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 60. Question 60: [Organic Introductory Organic]. How many structural and cis-trans isomers are there for dichloropropene, C3H4Cl2? Past Exam Paper -June 2003 Paper 1 Q20. The isomers are :. Include ONLY the reference. Comments will only be published after moderation. Subscribe to: Post Comments ( Atom ). 9701 MCQ Solution 80. 9701 MCQ Solution 41. 9701 MCQ Solution 16. 9701 MCQ Solution 58. 9701 MCQ Solution 1.

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 55

http://chemistry-ref.blogspot.com/2015/07/9701-mcq-solution-55.html

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 55. Question 55: [Inorganic Group 2]. What are the products of the thermal decomposition of magnesium nitrate? A magnesium nitride and oxygen. B magnesium oxide and nitrogen. C magnesium oxide, nitrogen and oxygen. D magnesium oxide, nitrogen dioxide and oxygen. Past Exam Paper -June 2003 Paper 1 Q15. Include ONLY the reference. Comments will only be published after moderation. Subscribe to: Post Comments ( Atom ).

aphysicsteacher.blogspot.com

A physics teacher: Second equation of motion

http://aphysicsteacher.blogspot.com/2011/01/second-equation-of-motion_16.html

Physics lesson online brought to you by a physics teacher. If you want to discuss more on this or other issues related to Physics, feel free to leave a message on my Facebook page. Sunday, January 16, 2011. Second equation of motion. We have seen in a previous post. The first equation of motion. Today we are going to see the second equation of motion. You would remember that the first equation dealt with acceleration. Time taken, initial velocity. So how do we derive the second equation of motion? For a ...

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 8

http://chemistry-ref.blogspot.com/2015/06/9701-mcq-solution-8.html

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 8. Question 8: [Physical States of Matter]:. A 2g sample of hydrogen at temperature T. And of volume V. Exerts a pressure p. Is an isotope of hydrogen. Which of the following would also exert a pressure p. At the same temperature T. A 2g of deuterium of volume V. B 4g of deuterium of volume V/2. C a mixture of 1g of hydrogen and 2g of deuterium of total volume V. Past Exam Paper – November 2002 Paper 1 Q8.

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 47

http://chemistry-ref.blogspot.com/2015/07/9701-mcq-solution-47.html

Atoms, Molecules and Stoichiometry. Carboxylic Acids and Derivatives. 9701 MCQ Solution 47. Question 47: [Physical Chemical Energetics]. Gaseous phosphorus pentachloride can be decomposed into gaseous phosphorus trichloride and. Chlorine by heating. The table below gives the bond energies. Bond energy / kJ mol. What is the enthalpy change in the decomposition of PCl5 to PCl3 and Cl2? A –420 kJ mol–1. B –90 kJ mol–1. C 90 kJ mol–1. D 420 kJ mol–1. Past Exam Paper - June 2003 Paper 1 Q7. 9701 MCQ Solution 1.