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SCIENCE PAPER 2 CHEMISTRY 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 on 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. Section I (40 Marks) Answer all the questions Question 1 a) Name the following. i) The element with highest Electron affinity value. ii) The gas which gives brown precipitate with Nesseler s reagent. iii) The change that a cation undergoes at cathode during electrolysis. iv) The conversion of a metal sulphide into a metal oxide by heating in presence of air. v) A gas which has suffocating odour and turns acidified Potassium dichromate to clear green solution. b) Match the following. Example- vi-G Part-A Part-B i) A gas which turns lime water milky A) Nitrogen and has suffocating odour ii) It oxidizes a non metal to its acid B) Sulphur dioxide iii) The gas released when Ammonia is oxidized in the absence of catalyst C) Vapour density rd iv) The element which belongs to 3 D) Nitric acid period and has largest atomic size among the elements belong to the same period E) Fluorine v) The ratio between the mass of a gas F) Sodium and the mass of Hydrogen gas of the same volume c) Select the correct answers from the words given below: i) Which of the following has a triple bond in its molecule? A) Oxygen B) Nitrogen C) Hydrogen D) Chlorine
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