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J \ \ I I ,1 ,. ' - ,, ',1 Sat Paul Mittal School Pre Board I Examination (2023-24) Subject-Chemistry Class X I '?, / I 1- / l.. Jlr MM:80 Time Allowed: z II d Th NOT 'd t s ore o owe additional 15 minutes for only reading the paper. ey must star t (Candi II e writing during this time.) ___.....----------------------------------------------------------------------------------------st 111 1 u "II\' .1111evl I WOl NOTE:1. This Quc ion Paper consists of Sprinted pages 2. Total number of Questions: 8 (Eight) General Instructions Attempt all questions from Section A and any four questions from Section B All working including rough work should be done on the same sheet as, and adjacent lo, the rest ofthe answer. The intended marks for questions or parts of questions are given in brackets []. Section A (Attempt all questions) Questionl Choose the correct answer from the given options: i) When a non-metal atom becomes an ion It loses electrons and is oxidised. M"It gains electrons and is reduced. ~It loses electrons and is reduced. (d) It gains electrons and is oxidised. ii) The most metallic element in its respective group is placed (a) At the top-- MA,.t the bottom (c) In the middle (d) Depends upon the group iii) Which is not correct with reference to the elements of group 18? (a) Zero electron affinity (b) Complete octet Jl!f Valency is variable (d) Max. ionization energy iv) Representative elements have Complete Penultimate shell (b) Incomplete Penultimate shell (c) Both of the above (d) None of the above v) The pH of copper chloride solution is ~ess than 7 ~ore than 7 (c) Equal to 7 (d) None of these vi) A compound with low melting point (a) calcium chloride (b) sodium fluoride carbon tetrachloride (d) potassium chloride vii) An electrolyte that completely dissociates into ions: (a) sodium hydroxide sucrose J'n;) alcohol carbonic acid . . viii) The reason for using Aluminium in the alloy duralumm ts: (a) Aluminium is brittle (b) Aluminium gives strength (c) Aluminium lowers melting point Aluminium brings lightness _kd) [1Xl5=15]
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