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f\i 'l I tl -.1 !{tr:,u: N,{*tsFrop coroN GT RLS' SCHOOL, BANGALORE s ECo t\ D TE R l\4 EXAN4 I tlATr o N - N ovE M B ER./D EC E r\4 B E R 2 0 L7 CHEMISTRY STD:X MARKS:80 DAfE:07.12"17 TIME :2 Hrs Answer to this poper must be written on the poper provided seoaratellr. You will not be oilowed to write during the first 15 minutes, This time is to be spent in reaciing the euestion paper" The time given at the heod of this poper is the time ollowed for writing the answrers. section I is compulsorr-. Attempt ony four questians from sectian r!. TheintertciedrnarksforquestionsorpartsofquesticnsotegiveninbrockersIi. sEcTtoN -t (Answer all the questions) QUESTION 1: a) Select the correct answer from the choices given : [10] 1,. Which one of the following is the most reactive? A" Fluorine B. Chlorine C" Bromine D. todine 2. Which one is the polar covalent molecule? A. KCI B. 3" NaCl C. CCt4 D, HCI sometimes chlorine gas is passed through water for its purification.what will be the pH of such a sample? A. Equalto 7 B. More than 7 C. lessthan 7 D. very nearto g 4" The aqueous solution of which one of the following salts will be acidic? A. NaHCO3 B. NaCl C. NH4CI D. CH3COONa 5. A knife is to be electroplated with nickel.The electrolyte selected is A' Nickel nitrate B. Nickelsulphate c, Nickelammonium sulphate D. Nickel bromide 6. But-L-ene and But-2-ene are examples of one of the following isomerism A' Chain isomerism B. position isomerism C. functional isomerism D" Geometric isomerism 7. The nitrate salt which does not give a mixture N02 and 02 on heating is A. AgN03 B. KNOs C. Cu(NO:)z D. Zn(NOg)z 8. 9' which one of the foilowing has rarger number of morecures? B" 12gofO2 C.2gofH2 D. 2LgofN2 which one of the foilowing has the smailest atomic radius? A" Lithium B. Fluorine C. potasium D. Chlorine A. 11gofCO2
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