znotes.ml

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 ).

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.

chemistry-ref.blogspot.com

Chemistry Reference: 9701 MCQ Solution 3

http://chemistry-ref.blogspot.com/2015/06/9701-mcq-solution-3.html

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.