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MOCK EXAMINATION, MARCH 2021 SUBJECT: CHEMISTRY GRADE: 10 MAX. MARKS: 80 DATE: 16/03/2021 TIME: 2 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 allotted for writing the answers. The question paper consists of 6 printed sides. 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) Fill in the blanks with the correct choices given in brackets. [1x5=5] i) The product formed at cathode during electrolysis of aqueous sodium chloride solution___________.(Oxygen gas/ Hydrogen gas/ Sodium metal/ Chlorine gas) ii) Ammonia reacts with excess chlorine to form _________________________. (nitrogen / nitrogen trichloride / ammonium chloride) iii) A covalent molecule containing three single covalent bonds is ______________. (nitrogen / ammonia / water / methane) iv) The alkaline behavior of liquor ammonia is due to presence of ____________ ions. (ammonium / hydronium / hydroxyl) v) An aqueous solution of sodium chloride will contain _____________(ions only/ ions and molecules/molecules only) Page 1 of 6
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