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ICSE Board Exam 2017 : Chemistry

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Vikash Kumar
Rajendra Vidyalaya (RV), Jamshedpur
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CHEMISTRY SCIENCE Paper 2 (Two hours) 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 all questions from Section II The intended marks for questions or parts of question are given in brackets [ ]. SECTION I (40 MARKS) Attempt all questions from this Section Question 1 (a) You are provided with the following substances. [5] Lead chloride, Zinc Sulphide, Sodium Carbonate, Lead Nitrate, Calcium Chloride, Calcium Sulphite, Zinc Carbonate, Silver nitrate, Ammonium Carbonate Choose one of the substances that matches the description. (i) A normal salt formed when a basic oxide and acidic oxide react. (ii) An insoluble carbonate. (iii) A salt that decrepitates on heating. (iv) An insoluble salt formed from two soluble salts. (v) A salt on heating leaves metal as residue. (b) Choose the most appropriate options:(i) [5] Which of the following is the characteristics of a covalent compound:(a) Always soluble in water (b) Consists of molecules (c) Conducts electricity when it is in the molten state (d) High melting point (ii) A compound that liberates reddish brown fumes around anode during electrolysis in its molten state is :- (iii) (a) Sodium chloride (c) Copper (II) sulphate (b) Lead bromide (d) Ethyl Bromide An organic compound that undergoes addition reaction and gives a red precipitate with ammoniacal cuprous chloride (a) Ethane (b) Ethane

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