9647 Chemistry Prelims

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RIVER VALLEY HIGH SCHOOLYEAR 6 PRELIMINARY EXAMINATION

CANDIDATENAME

CLASS 6

CENTRENUMBER

S INDEXNUMBER

H2 CHEMISTRY 9647/03Paper 3 Free Response 16 Septeme! 2013

2 "#$!%

Candidates answer on separate paper.

Additiona Materias! Answer Paper

Co"er Pa#e

Data Boo$et

REA& THESE INSTR'CTIONS (IRST

%rite &o'r na(e) *ass) *entre n'(+er and inde, n'(+er on a t-e wor$ &o' -and in.

%rite in dar$ +'e or +a*$ pen on +ot- sides o paper.

/o' (a& 'se a sot pen*i or an& dia#ra(s) #rap-s or ro'#- wor$in#.

Do not 'se stapes) paper *ips) -i#-i#-ters) #'e or *orre*tion 'id.

Answer an& )#$!0'estions.

Be#in ea*- 0'estion on a res- s-eet o paper.

A Data Boo$et is pro"ided. Do not write an&t-in# on it.

/o' are re(inded o t-e need or #ood En#is- and *ear presentation in &o'r answers.

T-e n'(+er o (ar$s is #i"en in +ra*$ets 1 2 at t-e end o ea*- 0'estion or part 0'estion.

At t-e end o t-e e,a(ination) asten a &o'r wor$ se*'re& to#et-er) wit- t-e *o"er pa#e on top.

Ri"er 4ae& 5i#- S*-oo 6789:39PRELIM9;3 *T$!+ #,e!Prei(inar& E,a(ination


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2

T-is do*'(ent *onsists o 11printed pa#es and 1+an$ pa#e.

Ri"er 4ae& 5i#- S*-oo 6789:39PRELIM9;3 *T$!+ #,e!Prei(inar& E,a(ination


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Answer an& )#$!0'estions.

1 -. O!t"#.+e) C=5>3N) is a o*a anaest-eti* t-at *a'ses te(porar&oss o pain.

>rt-o*aine! rapid& de*oo'rises a0'eo's +ro(ine to #i"e A) C=56>3NBr3.

#i"es a "ioet *oo'ration on addition o ne'tra FeCl3?a0@.

disso"es in Na>5?a0@ to #i"e ) NaC=5=>3N.

rea*ts wit- 5Cl?a0@ to #i"e a positi"e&*-ar#ed ion

C) C=5;:>3N.

rea*ts in t-e presen*e o -ot a*idiied Mn>7?a0@ to reease a*oo'ress #as t-at #i"es a w-ite pre*ipitate wit- i(ewater.

S'##est t-e str'*t'res o #!t"#.+e and A C) e,painin# &o'rreasonin#. 12

- N) *o((on& $nown as a'#-in# #as) is 'sed in s'r#er& anddentistr& or its anaest-eti* ee*t. >t-er t-an N) ot-er o,ides onitro#en in*'de N>.

N> as s-own +eow!

?#@ >


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- N>3. Gi"en t-at a t-esi"er sats as s-own +eow are sparin#& so'+e in water) e,pain t-eoowin# state(ent) 'sin# Le C-ateierHs prin*ipe. In*'de e0'ation?s@w-en possi+e.

132

- A#Cl is a sparin#& so'+e sat and -as a so'+iit& "a'e o

;.3: ;: (o d(3. To a


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2 -. Instant *od pa*$s are a *o((on dire*t repa*e(ent or *r's-ed i*e'sed as irst aid on sports inK'ries. An instant *od pa*$ *onsists o two+a#s one *ontainin# water) pa*ed inside anot-er +a# *ontainin#a((oni'( nitrate *r&stas) N57N>3?s@. %-en t-e pa*$a#e iss0'eeed) t-e inner +a# o water is +ro$en and aowed to disso"e t-e

a((oni'( nitrate.


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- Deine t-e ter( enthalpy change of solution.

- Gi"en t-at t-e ent-ap& *-an#e o -&dration o a((oni'( ions

and nitrate ions are ;3< $ (o; and 3?s@) a((oni'( and nitrate ions are#i"en as s'*-!

Spe*ies S 9 (o; ;

A((oni'( nitrate ;;A((oni'( ions ;=6Nitrate ions 3?a0@ N57N>3 ?a0@ O5r 8.: $ (o;

- Draw t-e dotand*ross dia#ra( or nitro's o,ide. 172


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- Nitro's o,ide is 'sed *o((er*ia& as a (i,t're wit- o,en #as and(ar$eted as Entono,) w-i*- is a (edi*a anest-esia #as 'sed innor(a *-id+irt-. Endorp-ins are reeased 'pon in-aation o Entono,)prod'*in# a eein# o we+ein#. T-e str'*t're o an endorp-in) w-i*-is a peptide) is s-own +eow. Under *ertain *onditions) denat'ration o

a peptide *an o**'r.

- %-at is (eant +& t-e ter( denaturationQ

- S'##est -ow p5 *-an#es *an denat're endorp-ins.

- 5ow (an& dierent a(ino a*id resid'es are present in anendorp-in peptide str'*t'reQ 172

- Anot-er 'se o nitro's o,ide is in t-e *o((er*ia preparation o sodi'(aide) NaN3. Sodi'( aide is in t'rn 'sed in air+a#s p't into

a'to(o+ies. Upon se"ere i(pa*t) a detonator *ap is i#nited and*a'ses sodi'( aide to de*o(pose e,posi"e& a**ordin# to t-ee0'ation +eow and iin# t-e air+a#!


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3 Po&?tetra'oroet-ene@ is a po&(er 'sed as a *oatin# in nonsti*$ $it*-en'tensis and or repa*e(ent +one Koints. >ne o t-e sta#es in t-e(an'a*t're o t-e po&(er is

E0'ii+ri'( ;!


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-. - Ca*'ate t-e e0'ii+ri'( *on*entration o 5C l) C


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%-en ni*$e (eta is added to a so'tion o iron?II@*-oride) t-ere is no"isi+e *-an#e.

%-en e,*ess a0'eo's a((onia is added to t-e a+o"e (i,t're) a#reen ppt o Fe?>5@


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At e0'ii+ri'() so'tion A*ontained t-e oowin#!

Co(po'nd Con*entration9

(o d(3

1Fe?en@32


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+ioo#i*a 'n*tions in o'r +odies. T-e +'idin# +o*$s o proteins area(ino a*ids) s'*- as e'*ine and #'ta(ine.

Le'*ine) C65;3N>


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- T-e Gro'p VIIee(ents are aso $nown as t-e -ao#ens.

- %-en +ro(ine is added to a0'eo's sodi'( t-ios'ate)Na


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