Formatting page ...
ST. MICHAEL'S SCHOOL, SILIGURI (BOYS' WING) PRE BOARD EXAM 2023-2024 SUBJECT: CHEMISTRY CLASS 10 (SCIENCE PAPER II) Maximum Marks: 80 Time allowed: Two Hour 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 f or writing the answers. Section A is compulsory. Attempt any FOUR questions from Section B. The intended marks for questions or parts of questions are given in brackets [ ] Section A (Attempt all questions from this section.) QUESTION 1 Choose the correct answers to the questions from the given option: [15] 1) The type of reaction taking place between alkane and halogens : a) Combustion b) Oxidation c) Hydrogenation d) Halogenation 2) Sodium hydroxide is added to the salt solution and shows different observations. Identify the correct set of observations from the given table: Salt Solution Colour of Precipitate Solubility in excess of NaOH W Fe(OH)3 Dirty Green Insoluble X Pb(OH)2 White Soluble Y Zn(OH)2 White Soluble a) Only W b) Both X and Y c) Both W and Y d) Both W and X Page 1 of 8
|
