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GARDEN HIGH SCHOOL CLASS X Half-Yearly Examination, 2022 23 Chemistry Time: 2 hours Full Marks: 80 This Question Paper has seven printed pages. Answers must be written in the script/s provided. You will not be allowed to write for the first 15 minutes. This time must be spent in reading the Question Paper. The time given at the head of this Paper is the time allowed for writing answers. This Paper is divided into two sections. Answer all the parts of Q No 1 (Section I) and any four questions of Section II. Maximum marks for a question or part of a question are given in brackets [ ]. SECTION I (40 marks) Answer each of the following questions. Question No 1 Choose the correct options: [15] (a) The salt that does not produce any white precipitate with dilute sulphuric acid is: (i) lead nitrate (iii) calcium nitrate (ii) zinc nitrate (iv) strontium nitrate (b) The total percentage of potassium in potassium dichromate is: [K = 39, Cr = 52, O =16] (i) 26.53 (ii) 50.64 (iii) 28.62 (iv) 13.26 (c) The gas that is produced when ammonia is passed over heated lead monoxide is: (i) H2 (ii) N2O (iii) NO (iv) N2 (d) An example of a polar covalent compound is: (i) calcium chloride (iii) hydrogen chloride (ii) acetylene (iv) carbon tetrachloride (e) The element in the third period of the Periodic Table that has the highest tendency to accept an electron is: (i) K (ii) Cl (iii) F (iv) Ar
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