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ICSE Chemistry: Model Paper 4 Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the Question Paper. The time given at the head of this paper is the time allowed for writing the answers. Section I is compulsory. Attempt any four questions from Section II. The intended marks for questions or parts of questions are given in brackets []. SECTION I (40 Marks) Attempt all questions from this Section Question 1 a) Mention the terms defined by the following sentences: [8] 1. The mass of a given volume of gas compared to the mass of an equal volume of hydrogen. 2. A soluble base. 3. The insoluble solid formed when two solutions are mixed together. 4. Compounds containing carbon and hydrogen only. 5. The property of spontaneous giving up water of crystallization to the atmosphere. 6. A compound that is soluble in water and the only negative ions in solution are hydroxyl ions. 7. An oxide, which reacts with both acids & alkalis. 8. The number that tells us the mass of an atom in comparison to 1/12 of mass C12 atom b) Describe how the following properties of an element changes, along the group and across the period [4] 1. Non-metallic character 2. Electron affinity 3. Atomic size 4. Reactivity of element c) Name the following [8] 1. A solid acid 2. A complex salt 3. A tri basic acid 4. An element having highest electronegative 5. A polar covalent neutral compound 6. Element having lowest ionization energy. 7. An acidic solution in which there is only partial ionization of the solute molecules. 8. A solution containing molecules as well as ions. d) Write the balanced equation for following reactions 1. Manganese (IV) oxide & conc. Hydrochloric acid. 2. Sulphur & hot conc. Nitric acid 3. Zinc & conc. Nitric acid 4. Ammoniac gas with excess chlorine 5. Ammonia with hot copper (II) oxide 6. Hydrochloric Acid with Potassium permanganate Jaydip.Chaudhuri@SaralaBirlaAcademy [6] 1
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