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OXFORD HIGH SCHOOL, HOWRAH - 09 Pre - ICSE Examination 2020-2021 Subject - Chemistry Science paper - 2 Time:( Two hours ) F.M - 80 Question 1: a) Choose the correct answer from the options given below: (10) (i) An element with the atomic number 19willmost likely combine chemically with the element whose atomic number is : (A) 17 (B) 11 (C) 18 (D) 20 (ii) The two main metals in bronze are : (A) Copper and zinc (B) Copper and lead (C) Copper and nickel (iii) The particles present in strong electrolytes are: Only molecules (B) mainly ions (C) ions and molecules (D) only atoms (iv) The aim of Fountain Experiment is to prove that: (A) HCl turns blue litmus red (B) HCl is denser than air (C) HCl is highly soluble in water (D) HCl fumes in moist air (v) Which of the following does not represent oxidation? (A) Loss of electrons (C) Increase in oxidation number (B) Addition of oxygen (D) Addition of hydrogen (D)Copper and tin
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