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M.E.C PUBLIC SCHOOL ICSE Yelahanka New Town Bangalore -560064 Preparatory examination 2024 Subject: Chemistry Grade:10 Marks:80 Date : 20/12/2024 Time: 2hours Instructions: Answers to this paper must be written on the paper provided separately. You will not be allowed to write during first 15 minutes. This time is to be spent in reading the question paper. Read all the questions carefully. The time given at the head of this paper is the time allowed for writing the answers. _____________________________________________________________________ Section A is compulsory. Answer any four questions from Section B. The intended marks for questions or parts of questions are given in bracket( ). _____________________________________________________________________ Section A ( 40 Marks) (Answer all questions from this section) 1. Choose the correct answer to the questions from the given options : (Do not copy the question, write the correct answer only) [15] 1. The number of electrons transferred completely from one atom to other is its : (a) Electrovalency. (b) Covalency (c) Both (a) and (b) (d) None of these 2. A compound with low boiling point is: (a) Sodium chloride. (b) Calcium chloride (c) Potassium chloride (d) Carbon tetrachloride 3. If the pH of a solution is 2 , then the solution is a: (a) Strong acid (b) Strong alkali (c)Weak acid (d) Weak alkali 4. The alkali that dissociates only partially in aqueous solution : (a) Lithium hydroxide (b) Calcium hydroxide (c) Potassium hydroxide (d) Sodium hydroxide 5. Hydronium ion is formed when a molecule of water combines with: (a) Hydrogen atom (b) Proton/Hydrogen ion (c) Hydrogen molecule (d) Oxygen atom 6. Cathode is a reducing electrode. Because :
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