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\ . ] MANECKJI COOPER EDUCATION TRUST SCHOOi. JUHU TARA ROAD, MUMBAl-400049 FIRST TERMINAL EXAMINATION AUG-2014 STD:-IX TIME: 2 Hours DATE:-13 -08-2014 SUBJECT:-CHEMISTRY MAllKS:-80 SECTION A[40 Marks] (Attemp t all guestio ns from this section} QUESTION 1: - A) Name the followings: (5) i) An example of colloidal solution. S~ ~ d w,,Je>c. ii) A bluish, explosive gas with a pronounced odour. 0-3 ""iii) A polar covalent compound. W ....f-c-r iv) v) An atmospheric pollutant produced during lightening discharge. V'\ 0 A homogenous mixture. g, oJ.,_, C) 1) Give Reason: - 2- (3) i) Atomic mass of chlorine is a fraction and not a whole number. Air is considered a mixture and not a compound. . iii) Waterisauniversalsolvent _o :dcl'vc< f!f,l,>;"""' 't ; ,. ;' ,c:,;. 7 ~ :J rA' , ~~:,.r-~ 0 ,, ,-;),. J ... )/ 2) What is meant by acid rain. Give two impacts of acid rain. (2) ii) t:_J 'r ' I L DJ 1) State giving reason whether _the underlined are reduced or oxidized:( _) (3) i) Fe 2+ - - - Fe3+ <J......; _ L5~ e . HJ Al - - - - Al 3+ L,:,( 0 " - ) .,,drr iii) Cu 2 r t ..,, , ;.r, Cu +_____ o..,, r tj 2) Draw the election dot diagram.for the formation of Magnesium , Chloride.(MgCh) [Mg=12,Cl=171 /J, ii; tit M71~ c1; (2) ~ ~ ) JJ~f.,;u.;)!_ ', ::i... 2{,1 .. .. l tj .t!':...., I ('I E) 1) State the main observation with a balanced chemical equation / ,.,, , for the following: (4) Action of heat on:rJ i) Lead dioxider(),-.,17 l o/ ,J;, ,..., r '"' J-. ii) c~ ,).,_ -IA, .1-- I w~ ,t-1 t, v'"',J,'o'-' on> r~,J,--~ er 1,.J
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