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Birla Institute of Technology and Science, Pilani, Rajasthan 333 03fComprehensive Quiz I Semester 2013-2014Course Title: Chemistry LaboratoyyMax. Marks: 60 Course Number: CIIEM Ftl0CLOSED BOOK : Time: 60 minutesDate:30.11.2013Note: There arc two pages with 30 questions in all. Indicate the most appropriate answer by enloing A, 4 C brD(block capitat letters only) in the bgx provided on the right had side.Do not overwrite. Do not use pencll Each conct dBwer witl ti awaided trrc (2) tndl(s ard 05 mark wlll be dgduddfon errcry wrong answer. 'Useff Aaa: et Wr:Na=23,Mg=24, Ca=rt0,Cu=63: Attlo.: Cu*2g R=8314JK-tmol-lID'No.:Name:

Scction Number:Name of Instructor:

Q.l Which ofthe followingis an effectofacatalystonachemical reaction, A+B S c+D ? trtrEm,E

'-'j :

tEltrEJEEHtr

(A) elevation of activation enerry,(C) increase the equilibrium constant (B) shift the equilibrium to the products@) increase the rate at which equilibrium is achieved

(c) DX>Y (D) X>z>YmL of 0.008 M EDTA solution, then the hardness

(C) 170 ppm (D) 90 ppm

Q.2 The OH peak in the IR spectrum of potassirm copper oxalato comptex (synthesized by'you) is observed at' '(A) 1234 cm't (B) 1645 6nfl (C) 2900 cm t , (D) 3394 crn'r, :Q.3 The molecular formula of potassium copper oxalato complex (synthesized by you) is(A) [K2Cu(CzOr)zJ'2H2A (B) KzCu(CzOr)dHzO)zI (C) K2[Cu(CzOr)z]'zWO . (D) KzlGu(Cz0*](HrO]IQ.4 If all the oxygen atoms in potassium copper oxalato complex (synthesized by yo r) are labelledwith rt0isotope, then the lR stretching tiequency witl i.,(A) decrease for both caibonyl and hydroxyl groups @) increase for both carbonyl and,hydroxyl groups(C) Only increase for hydroxyl group @) only decrease forcarb,onyl groupQ.5 In the TLC experimer*, ifwe consider different vuiable sonditions such as (l) future ofsolvent, (2) r|rltibg lofadsorben aad(3)volumeofsolvent(shouldnotoY>Z (B) Y>X>ZQ.9 If 50 mL of the water sample consumed 10.7of the water sample is(A) 150 ppm (B) 100 ppm

f=T1IIl-ltttlt

A Y,LFigr

Q.l0 Suppose you take l0 mL calbium carbonate of strength 0.1 M in conisal flask and [hen ;udidZ mL buffer and3-4 drops of EBT in the flask. During titration with EDTA if the end point appears after consumption,of l0 mLEDTA, then what will be the concentration of EDTA solution?(A) rM (B) 0.1 M (c) 0.0r M (D) 0.001MQ.ll For the following reaction,.when ethyl alcohol and acetic acid are mixed in equivalent proportiols, theequilib'rium is attained after 2/3' of consumption ofthe acid and alcohol. The equilibrium. constant ofthe reaction isCH3COOH + C2H5OH == CH3COOC2H5 + H2O(A) 4.0 (B) 0.25 (C) 2 (D) 0.sQ.12 If5 moles ofacetic acid and 2 moles ofethyl alcohol are used in acid catalyzed conditions to yieldethyl acetate and water. How many moles ofacetic acid will be left ar equilibrium, ifK" ofthe reaction is 3?(A) r.7 (B) 3.3 (c) 8.7e (D) 3.7e

(D) ('Q.13The denticity of NatEDTA in the pH range 9-l I will be(c) 4

it

(A) 2 (B) 3

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