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ICSE Class X Prelims 2023 : Chemistry (Atul Vidyalaya, Valsad)

4 pages, 74 questions, 5 questions with responses, 5 total responses,    0    1
Indian Certificate of Secondary Education (ICSE), New Delhi
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ATUL VIDYALAYA, ATUL, VALSAD SECOND PRELIMINARY EXAMINATION (2022-23) SCIENCE PAPER-2 CHEMISTRY STD-X MM- 80 TIME-2 HR DATE-13/01/2023 Answer to this paper must be written on the paper provided separately Attempt all question from section A and any four question from Section B. The intended marks for question or parts of question are given in brackets []. Section- A (Attempt all the questions from this section) Question 1 [15] Choose the correct option: :() The organic compound which undergoes substitution reaction is: (a) C2H2 (c) C2Hs (b)CaHa (d) Both A and B (ii) The element with highest ionisation potential is: (b) Helium (a) Hydrogen (c) Caesium (d) Radoon (ii) The hydroxide soluble in excess of sodium hydroxide is: (a) Lead hydroxide (b) Copper(11) hydroxide (c) Ferrous hydroxide (d) Both A and B (iv) The molecular mass of a gas with vapour density 9 is: a ) 18 (c) 36 (b) 4.5 (v) Nessler's reagent is used to confirm the presence of (b) Nitrate (c) Ammonium (a) Sulphide (d) 72 ion (d) Chloride (vi) A particular solution contains molecules and ions of a solute. So it is a: (a) Strong acid (b) Strong electrolyte (d) Weak electrolyte (c) Non electrolyte (vii) Which armong the following is not an alloy of copper? (b) Bronze (a) Brass (c) Duralumin (d) Solder (vii) The IUPAC name of the compound HCECH is (b) Ethene (a) Acetylene (c) Ethylene (d) Ethyne (ix) What reaction occurs at cathode during electroplating nickel on an article? (a) Ni" + 1e Ni (b) Ni 1e Ni (d) Ni -2e Ni2 (c) Ni+2e Ni Atul Vidyalaya Page 1 Cont....on page 2 Shaping the Future

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