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BREl's Blue Ridge Public School Secondary Section Name: Std:X Date:25/03/2022 Subject: Chemistry Time: 1hr 30min Max. Marks: 40 Pre-Boards 2021-2022 Ar swer to this paper must be written on the paper provided separately The paper is divided into two Sections Attempt all questions from Section A and any three questions from SectionB. The intended marks for questions or parts of questions are given in brackets [ ]1 SECTION A (10 Marks) Attempt all questions from this section Question 1. Choose the correct answers to the questions from the given options. (Do not copy the question. Write the correct answer only.) i. An alloy of aluminiurn is a . Magnalium b. Bronze c.oider d. Stainless steel ii. In the Ostwald's process, ammonia and air are mixed in the ratio of: a. 1:3 by volume b. 3:1 by volume c . 1:10 by volume d. 10:1 by volume ii. The constituents of Duralium are: a. Al, Mg. Mn Al, Mg AI, Mn d. Al, Mg, Mn, Cu iv. Which of the following will undergo substitution reaction? a. . c. d. Propene Propane Propyne Propanal [101
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