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ICSE Prelims 2017 : Chemistry (GEMS Modern Academy, Dubai)

5 pages, 81 questions, 80 questions with responses, 166 total responses,    0    0
Sagar Bohara
GEMS Modern Academy, Dubai
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MOCK EXAMINATION 2017 CHEMISTRY Grade: 10 Date: 19-02-2017 Time: 2 hrs. Max.marks: 80 __________________________________________________________________________ INSTRUCTIONS: The time stated above is the time allowed for writing the examination. In addition, the first 15 minutes will be the time given for reading the question paper. This paper is divided into Section A (40 marks) and Section B (40 marks). Answer all questions from Section A and any four questions from Section B. ____________________________________________________________________ SECTION A ( 40 MARKS ) Answer ALL Questions Question 1 (a) Name the following: (i) The gas used as a reducing agent in reducing copper oxide to copper. (ii) The functional group in ethanoic acid. (iii) The metal which burns in air with a golden yellow flame. (iv) The acid which produces sugar charcoal from sugar. (v) The gas produced when excess ammonia reacts with chlorine. (b) Choose the most appropriate answer for each of the following: (i)This is not an alloy of copper. (A)Brass (B)Bronze (C)Solder (D)Duralumin [5] [10] (ii)When fused lead bromide is electrolyzed, we observe (A)A silver grey deposit at the cathode and a reddish brown deposit at the anode (B) A silver grey deposit at the anode and a greyish brown deposit at the cathode (C) A silver grey deposit at the cathode and a reddish brown fumes at the anode (D) A silver grey deposit at the anode and a reddish brown fumes at the cathode (iii) Propane has (A) 7 covalent bonds (B) 9 covalent bonds (C) 8 covalent bonds (D) 10 covalent bonds (iv)Brown ring test is used for the detection of (A)Sulphate ion (B)Sulphide ion 1

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