Sec1 Section C Wb

SectionC - LonoQuestion in the spacesprovided. Answerallthequestions usingpaper C{ (a} Thedyesusedin fivedifferentpenswereinvestigated Thefollowingdiagramshowsdetailsof the separation chromatography. obtained.

Turquoise

Yellow

Blue

Red

6v@vt

n

(i)

ofthespotX.....L9.:. ldentifo thecolour

....tll

(ii)

Thegreendyecontainsa mixture rlueand vellowdye Drawabove youwouldexpectto seewhenthe the greendot,the chromatogram dyesin thegreendotareseparated. I1l

(ii[

as comparedto ExplainwhyspotB is turtherup the chromatogram spotA.

gG

wYa mlw;2 4lsn ...:.v.?.y...*

.t1I (iv)

Explainwhythe baselinemustbe drawnin pencilinsteadof ink. l,

tr 4b brevui t.. ''. '.'

4l^a bateline +D W- Asm\"ed rA lle glvuL

r9

18

(b)

X, Y andZ. of threesubstances Thetablebelowshowsthe cfiaracteristics Meltingpoint Boilingpoint

fc)

x

650

1046

No

Yes

Y

fi24

20/.5

Yes

No

z

2465

3276

No

No

{i}

lpt"'\ f\

Describebrieflynoweachof the@ample canbe obtainedseparately a mixtureof X, Y andZ. fom a beakercontaining 'L {low *o } . Ll.o A ym}yv+4o sopa"ato

\+' (L-q"^ -*--rhtt4vre

Able to diesolve Able to be attracted by a magnet? in water?

("cl

X,Ytv ,

f n^47'

(Wnfle

Y

z) r M;V

h,l!.

dr:ii\leJ b.nIer 4t ywan+ cvlar'finqh'\

fvrr.n wmytt Y . ?*1 snw/e Z fr.' &)wat-, sl+ots 4 Plhe, mFq'

,

.tl

Wl{ 4o ef [Y +?) , adA ^*er TiHev^ lhe rq\Aure' To +B re;lAve

To ,tts rev-rircln2\tx4ure dttso\vo s \ple

9r'rylc p rr.ri\\be a+Mdad 4j rwn2rul \aar"r6; teaw& wmyLl vlx4"tt Dl

:mix*vtro.

tvaryk

+)-,{ti l*as< (ranVu Y) fu dv2nen4D obtEG

:ryrlelJ l, 4:-q |frs\rO rrlx4vrve

til)

d+ry)

r4r

as givenin the table of the substances Basedfom the characteristics possible Z' identities of X and the suggest above,

Z:

sdralion Y

\ , ------->

\,/

fl;)

\J-'/

evA\Nlile 1l/'

(tlt"?k 'i' oVfuti, Y

)n ;amYleI

I

Wr^qV T Ar:11 6 b(fuolr' ,. fl
l9

C\'tlV

tzl