2013 NJC H2 Chemistry Paper 1 Questions and Answers

8/11/2019 2013 NJC H2 Chemistry Paper 1 Questions and Answers

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1

NATIONAL JUNIOR COLLEGESH2 PRELIMINARY EXAM

Higher 2

CANDIDATE

NAME

SUBJECT

CLASS

REGISTRATION

NUMBER

CHEMISTRYPaper 1 Multiple Chi!e

A""iti#al Material$% Multiple Chi!e A#$&er Sheet

Data B'let

9647/01

Thu 19 Sep 201!

1 h"u#

REA$ THESE INSTRUCTIONS %IRST

(rite i# $)t pe#!il*

D #t u$e $taple$+ paper !lip$+ highlighter$+ glue r !rre!ti# )lui"*

(rite ,ur #a-e+ $u./e!t !la$$ a#" regi$trati# #u-.er # the A#$&er Sheet i# the $pa!e$pr0i"e" u#le$$ thi$ ha$ .ee# "#e )r ,u*

There are 40ue$ti#$ # thi$ paper* A#$&er &''ue$ti#$* r ea!h ue$ti# there are )urp$$i.le a#$&er$ A+ (+ Ca#" $*

Ch$e the ")e,u !#$i"er !rre!t a#" re!r" ,ur !hi!e i# *"+ pe),-'# the $eparateA#$&er Sheet*

Re&. he -)*#u,-")* ") he A)*e# Shee e# ,e+u''

Ea!h !rre!t a#$&er &ill $!re #e -ar'* A -ar' &ill #t .e "e"u!te" )r a &r#g a#$&er*A#, rugh &r'i#g $hul" .e "#e i# thi$ .'let*

This paper consists of 19printed pages and 0blank page.

Se,-") A

NJC/H2 Che3/01/201! Tu#) "e#


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2

r ea!h ue$ti# there are )ur p$$i.le a#$&er$ A+ (+C+ a#" $* Ch$e the #e ,u!#$i"er t .e !rre!t*

1 (hi!h #e ) the )ll&i#g repre$e#t$ the !#)igurati# ) the three ele!tr#$ )

highe$t e#erg, )r the gru#" $tate ) a# ele-e#t i# grup III3

A 1$2 2$1

( 1$1 2$1 2p1

C 2$1 2p2

$ 4$2 4p1

2 The rst ionisation energies of twenty successive elements in the PeriodicTable are represented in the graph.

The letters given are not the normal symbols for these elements.

(hi!h $tate-e#t a.ut the ele-e#t$ a#" their !-pu#"$ i# thi$ graph i$ )" true3

A O5i"e a#" h,"r5i"e ) ele-e#t Mare a-phteri!*

( O5i"e ) ele-e#t %ha$ a gia#t !0ale#t latti!e $tru!ture*

C Ele-e#t$ (+ Ja#" Rare i# Grup 6 ) the Peri"i! Ta.le*

$ The $e!#" i#i$ati# e#erg, ) 5i$ larger tha# the $e!#" i#i$ati# e#erg, ) L*

! I# a# e5peri-e#t+ a .ea- ) prt#$ &a$ pa$$e" thrugh a# ele!tri! )iel" ) !#$ta#t

$tre#gth* A#al,$i$ ) the "e)le!ti# !!urri#g at the ele!tri! )iel" regi# re0eale" a#

a#gle ) "e)le!ti# ) 127 t&ar"$ the #egati0e plate*

NJC/H2 Che3/01/201! Tu#) "e#

)ir$t i#i$ati#e#erg,

8'J -l1


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!

U#"er i"e#ti!al !#"iti#$+ a .ea- ) parti!le$+ + ea!h ha0i#g 24 ti-e$ the -a$$ ) a

prt#+ &a$ "e)le!te" ., a# a#gle ) 1t&ar"$ the p$iti0e plate*

(hat i$ the 0erall !harge # a parti!le ) 3

A 92

( 9:

C ;:

$ ;2

4 Use of the Data Booklet is relevant to this question.

A t,pi!al $li" )ertili$er )r u$e &ith hu$ehl" pla#t$ a#" $hru.$ !#tai#$ the ele-e#t$N+ P+ a#" < i# the rati ) 1= g % :6 g % 1= g per 166 g ) )ertili$er* The re!--e#"e"u$age ) )ertili$er i$ 14 g ) )ertili$er per = "-: ) &ater*

(hat i$ the !#!e#trati# ) #itrge# at-$ i# thi$ $luti#3

A 6*6: -l "-;:

( 6*6= -l "-;:

C 6*42 -l "-;:

$ 6*>= -l "-;:

NJC/H2 Che3/01/201! Tu#) "e#

12

prt#$


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5 0.200 mol of a hydrocarbon undergo complete combustion to give 35.2 g ofcarbon dioide and !"." g of water as the only products.

#hat is the molecular formula of the hydrocarbon$

A C2H4

( C2H?

C C4H4

$ C4H@

6 The i#$ P:;+ S2;a#" Cl;ha0e ra"ii 6*212#-+ 6*1@4#- a#" 6*1@1#- re$pe!ti0el,*

(hi!h #e ) the )ll&i#g !rre!tl, e5plai#$ the "e!rea$e$ i# ra"iu$ gi#g )r- P:;t

Cl;3

A A# i#!rea$e i# .th the ttal #u-.er ) ele!tr#$ a#" the #u!lear !harge

( A# i#!rea$e i# the ttal #u-.er ) ele!tr#$ &ith the #u!lear !harge re-ai#i#g!#$ta#t

C A !#$ta#t ttal #u-.er ) ele!tr#$ a#" a# i#!rea$e i# the #u!lear !harge

$ A "e!rea$e i# the ttal #u-.er ) ele!tr#$ &ith the #u!lear !harge re-ai#i#g!#$ta#t

7 (hi!h ) the )ll&i#g $pe!ie$ "e$ )"ha0e a .#" a#gle ) 126aru#" the !e#tralat-$3

A AlCl:

( CH:9

C PH:

$ N2O4

I# &hi!h pr!e$$ are h,"rge# .#"$ .r'e#3

A 2H2Ol 2H2g 9 O2g( CH:CH2OHl CH:CH2OHg

C NH:a 9 H2Ol NH49a 9 OH%a

$ CH:COOHa 9 NaOHa CH:COONaa 9 H2Ol

NJC/H2 Che3/01/201! Tu#) "e#


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9 The euati# .el& repre$e#t$ the !-.i#ati# ) ga$eu$ at-$ ) ##-etal Xa#") h,"rge# t )r- ga$eu$ X2H?-le!ule$*

2 Xg 9 ? HgX2H?g H F ;2>>= 'J -l;1

The .#" e#erg, ) a# X;H .#" i$ := 'J -l;1*

(hat i$ the .#" "i$$!iati# e#erg, ) a# X;X.#"3

A ;46=*6 'J -l;1

( ;262*= 'J -l;1

C 9262*= 'J -l;1

$ 946=*6 'J -l;1

10 (hi!h ) the )ll&i#g $tate-e#t$ a.ut latti!e $tru!ture$ i$ ,"##e,3

A The latti!e e#erg, ) a# i#i! !r,$tal te#"$ t .e large i) the $ie$ ) the t& t,pe$

) i#$ i#0l0e" are $-all*

( The parti!le$ !!up,i#g latti!e $ite$ -a, .e at-$ r i#$ .ut #t -le!ule$*

C The )r!e$ hl"i#g the latti!e tgether are $ $tr#g that the parti!le$ !!up,i#glatti!e $ite$ are hel" $tati#ar,*

$ The latti!e e#erg, ) a# i#i! !r,$tal i$ al&a,$ larger tha# that ) a -etal*

NJC/H2 Che3/01/201! Tu#) "e#


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11 The "iagra- $h&$ the Br#Ha.er !,!le )r the )r-ati# ) -ag#e$iu- )luri"e*

Mg$ 9 2g Mg2$

(hi!h ) the )ll&i#g repre$e#t$ the !rre!t e#erg, !ha#ge$+ H1a#" H23

H1 H2

A Hat-) Mg 9 1$ta#" 2#"E*A ) Mg 2Hat- ) 29 21$tI*E )

( Hat-) Mg 9 1$ta#" 2#"I*E ) Mg 2B*E ) 2 9 21$tE*A )

C Hat-) Mg 9 1$ta#" 2#"I*E ) Mg 2Hat-) 2 921$tI*E )

$ Hat-) Mg 9 1$ta#" 2#"I*E ) Mg B*E ) 2 921$tE*A )

12 2= ) a $luti# ) etha#i! a!i" &a$ !#0erte" t etha#ate i#$ ., rea!ti# &ith$"iu- h,"r5i"e $luti# at 2= C*

(hat i$ the 16 4%

( 1*:1 16 =%

C 1*>= 16 =%

$ =*24 16 =%

NJC/H2 Che3/01/201! Tu#) "e#

H2H1

2g9Mg29g

Hat- % E#thalp, !ha#ge ) at-iati# I*E % I#i$ati# e#erg,

E*A % Ele!tr# A))i#it, B*E % B#" e#erg,


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1! The $lu.ilit, ) ir#II !ar.#ate i# &ater at 2= C i$ =*= 16 ?% -l "- :% *

(hat i$ the #u-eri!al 0alue ) the $lu.ilit, pr"u!t )r ir#II !ar.#ate &he#

"i$$l0e" i# a 6*61 -l "- :% $luti# ) ir#II !hlri"e at 2= C3

A =*= 16 @%

( =*= 16 16%

C :*12 16 %

$ :*12 16 11%

14 The )ll&i#g "ata i$ .tai#e" "uri#g the )ir$t r"er ther-al "e!-p$iti# )

2Ag (g 9 C$

at !#$ta#t 0lu-e a#" te-perature*

Ti-e Ttal pre$$ure i# Pa$!al

At the e#" ) 16 -i#ute$ ) rea!ti# ?66

A)ter !-pleti# ) rea!ti# 466

(hat i$ the rate !#$ta#t )r thi$ rea!ti# i# -i#13

A !a##t .e "eter-i#e" "ue t i#$u))i!ie#t "ata

( 6*6:4?

C 6*6?:

$ 6*1:@

NJC/H2 Che3/01/201! Tu#) "e#


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18 The !ur0eYa#" the 0alue Earepre$e#t the "i$tri.uti# ) e#ergie$ ) the -le!ule$a#" the a!ti0ati# e#erg, )r a# u#!atal,$e" ga$eu$ rea!ti#*

(hat i$ a p$$i.le ut!-e i) the rea!ti# i$ !atal,$e"3

A The "i$tri.uti# ) e#ergie$ &ill .e gi0e# ., !ur0eYa#" the a!ti0ati# e#erg, .,0alue:*

( The "i$tri.uti# ) e#ergie$ &ill .e gi0e# ., !ur0eYa#" the a!ti0ati# e#erg, .,0alue ;*

C The "i$tri.uti# ) e#ergie$ &ill .e gi0e# ., !ur0e Xa#" the a!ti0ati# e#erg, .,0alue ;*

$ The "i$tri.uti# ) e#ergie$ &ill .e gi0e# ., !ur0e


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17 E1+ E2a#" E: are the e-) 0alue$ ) the three gal0a#i! !ell$ I+ II a#" IIIre$pe!ti0el,*

Cell I K# K#291 -l "-: 88 Cu29 6*1 -l "-: Cu

Cell II K# K#291 -l "-: 88 Cu29 1 -l "-: Cu

Cell III K# K#296*1 -l "-: 88 Cu29 1 -l "-: Cu

All the $tate-e#t$ are true e5!ept

A The e-) ) the three !ell$ are ) the r"er % E: E2 E1

( The plarit, ) the !pper ele!tr"e i$ p$iti0e #l, i# !ell IIa#" III*

C The !lur ) the $luti# )a"e$ i# #e ) the !-part-e#t$ ) ea!h !ell*

$ Ele!tr#$ )l& )r- the i#! ele!tr"e t the !pper ele!tr"e i# all the three!ell$*

1 The i#)r-ati# relate$ t ele-e#t


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20 An enzyme is completely denatured at 50 C. A fixed concentration of this enzyme is

added to a fixed concentration of its substrate. The time taken for completion of the

reaction is measured at different temperatures.

Which graph shows the results?

21 O#e ) the rea!ti#$ ta'i#g pla!e i# a !atal,ti! !#0erter i# a !ar e5hau$t $,$te- i$.et&ee# #itrge# 5i"e a#" !ta#e u#.ur#e" petrl* The pr"u!t$ ) thi$ rea!ti# are##t5i!*

(hi!h i$ the !rre!t euati# )r the rea!ti#3

NJC/H2 Che3/01/201! Tu#) "e#

A C@H1?9 1? NO @ CO 9 @ N29 @ H2O

( C@H1?9 24 NO @ CO29 12 N29 @ H2O

C C@H1@9 1> NO @ CO 9 @ N29 H2O

$ C@H1@9 2= NO @ CO29 12 N29 H2O


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22 The pr"u!t$ .tai#e" ., !ra!'i#g a# al'a#e+ M+ are -etha#e+ ethe#e a#" prpe#e*The -le )ra!ti# ) ethe#e i# the pr"u!t$ i$ 6*=*

(hat i$ the i"e#tit, ) M3

2! (hat i$ the ttal #u-.er ) i$-er$ i#!lu"i#g $terei$-er$ )r a# rga#i! !-pu#"+

C4H3

24 #hat causes carbonyl groups& '()& to react by a nucleophilic mechanismwhile alkene groups& '('& react by an electrophilic mechanism$

A 5,ge# i$ -re rea!ti0e tha# !ar.#

( the "i))ere#t le#gth$ ) the "u.le .#"$

C the relati0e $tre#gth$ ) the "u.le .#"$

$ the ele!tr#egati0it, "i))ere#!e .et&ee# the !ar.# a#" 5,ge# at-$ i# the!ar.#,l grup

NJC/H2 Che3/01/201! Tu#) "e#

A C?H14

( C@H1@

C CH26

$ C11H24

A :

( 4

C =

$ ?


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28 C#$i"er the )ll&i#g )ur !-pu#"$*

(hat i$ the relati0e r"er ) "e!rea$i#g a!i"it, ) the$e !-pu#"$3

26 A pr"u!t P i$late" )r- a #aturall,;!!urri#g $ur!e i$ e$ta.li$he" a$ ha0i#g a

-le!ular )r-ula ) C@HNO:* It p$$e$$e$ a !hiral !e#tre a#" it )r-$ a &itteri#*

(hi!h #e ) the )ll&i#g $tru!ture$ !ul" .e P3

NJC/H2 Che3/01/201! Tu#) "e#

1 2#itrphe#l

2 .e#i! a!i"

! 2!hlr.e#i! a!i"

4 !,!lhe5a#l

M$t a!i"i! Lea$t a!i"i!

A : 2 4 1

( : 2 1 4

C 2 : 4 1

$ 2 : 1 4

A HO CH

NH2

COOH

( O2N CH

OH

CH:

CHO CH2NH2

COOH

$

H2N CH2OH

COOH


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27 Sa#t#i# i$ a "rug that &a$ #!e &i"el, u$e" t e5pel para$iti! &r-$ )r- the .",*

$a#t#i#

(he# $a#t#i# i$ )ir$t treate" &ith &ar- "ilute H2SO4+ )ll&e" ., !l" a!i"i)ie"


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29 The )ir$t $tage i# the $,#the$i$ ) a#tip,ri#e+ a "rug u$e" i# re"u!i#g )e0er+ i$ therea!ti# .et&ee# !-pu#" Pa#" phe#,lh,"rai#e*

CH:COCH2CO2CH2CH: 9 NHNH2 6

P phe#,lh,"rai#e

(hat i$ the $tru!ture ) 3

NJC/H2 Che3/01/201! Tu#) "e#

ANHN

CH:CCH2CO2CH2CH:

( NHCH2CO2CH2CH:

C

NHNH2CH:COCH2CO

$

CH:COCH2CONH


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!0 The rea!ti# !#"iti#$ )r )ur "i))ere#t tra#$)r-ati#$ are gi0e# .el&*

(hi!h tra#$)r-ati# &ill !!ur u#"er the gi0e# !#"iti#$3

NJC/H2 Che3/01/201! Tu#) "e#

A

CH:COOHAl+ !#! H

2SO

4

heat

OH OCOCH:

(

Br2Aa+ eBr:

:6C

CH: CH:

Br

t

C

NaA$Br

OH

Br

Al O

Br

$


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Se,-") (

r ea!h ) the ue$ti#$ i# thi$ $e!ti#+ #e r -re ) the three #u-.ere" $tate-e#t$ 1t

!-a, .e !rre!t* De!i"e &hether ea!h ) the $tate-e#t$ i$ r i$ #t !rre!t ,u -a, )i#" it

help)ul t put a ti!' agai#$t the $tate-e#t$ that ,u !#$i"er t .e !rre!t*

The re$p#$e$ At $$hul" .e $ele!te" # the .a$i$ )

A ( C $

1+2+ a#" !are!rre!t

1a#"2#l, are!rre!t

2a#" !#l, are!rre!t

1#l, i$ !rre!t

N ther !-.i#ati# ) $tate-e#t$ i$ u$e" a$ a !rre!t re$p#$e*

!1 (hi!h ) the e#thalp, !ha#ge$ ) the )ll&i#g rea!ti#$ !a# #l, .e .tai#e" .,

appli!ati# ) He$$ La&3

1 The h,"rati# ) a#h,"ru$ !pper $ul)ate t )r- !r,$tal$ ) CuSO4*=H2O*

2 The )r-ati# ) -etha#e )r- it$ ele-e#t$*

! The !-.u$ti# ) glu!$e+ C?H12O?*

32 Str#tiu- -etal !a# .e .tai#e" ., the ele!trl,$i$ ) -lte# $tr#tiu- .r-i"e+SrBr2+ u$i#g the apparatu$ $h i# the "iagra-*

#hich statements concerning the electrolysis are true$

1 1: !ul-.$ ) ele!tri!it, are #ee"e" t "ep$it 1 16:-l ) $tr#tiu- at-$

at the a#"e*

2 The regi# aru#" the graphite ele!tr"e tur#$ ,ell& ; ra#ge*

! #ithout the atmosphere of argon& strontium oide would be formed.

33(he# light i$ $h#e )r a )i5e" peri" i#t a $luti# ) CH2

ICH2

I a#"

I2 i#tetra!hlr-etha#e at 166C+ the )ll&i#g rea!ti# !!ur$%

NJC/H2 Che3/01/201! Tu#) "e#

$teel ele!tr"e

graphite ele!tr"e


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17

CH2ICH2I CH2FCH2 9 I2

e5peri-e#tRelati0e i#itial !#!e#trati# Relati0e light

i#te#$it,

Relati0e i#itialrate ) )r-ati#

) I2C2H4I2 I2

1 2 1 4 22 2 1 1 1

: 1 1 4 1

4 1 2 4 1

#hat conclusions about the reaction can be drawn from the data in thetable$

1 The rate of formation of iodine is proportional to initial concentration ofC2H4I2*

2 The rate of formation of iodine is proportional to(light intensity).

! I"i#e i$ #t i#0l0e" i# the rate "eter-i#i#g $tep*

34 I# .la!' a#" &hite phtgraphi! )il-+ light !#0ert$ $il0er !hlri"e i#t -etalli! $il0er*A)ter the )il- ha$ .ee# "e0elpe"+ the u#e5p$e" $il0er !hlri"e i$ re-0e" .,rea!ti# &ith $"iu- thi$ul)ate t pr"u!e a )i5e" #egati0e*

The process can be represented by the following two reactions:

2AgCl2Ag + Cl2AgCl 9 2Na2S2O: 4Na99 Cl;9 AgS2O:2Q:;

(hi!h $tate-e#t$ a.ut the rea!ti#$ are !rre!t3

1 Bth rea!ti#$ i#0l0e a !ha#ge ) 5i"ati# #u-.er*

2 The rle ) $"iu- thi$ul)ate i$ t -a'e the $il0er i#$ $lu.le*

! +oth reactions have positive , values.

!8 C#$i"er the $pe!ie$ i# the )ll&i#g euati#*

TiH2O4Cl2Q9a 9 2H2Ol TiH2O?Q

:9a 9 2Cl;a

(hi!h $tate-e#t$ are !rre!t3

1 (ater a!t$ a$ a Le&i$ .a$e*

2 The !-ple5 i#$ are .th !tahe"ral*

! The TiH2O?Q:9i# !a# a!t a$ a Br#$te";L&r, a!i"*

The re$p#$e$ At $$hul" .e $ele!te" # the .a$i$ )

NJC/H2 Che3/01/201! Tu#) "e#


18/20

1

A ( C $

1+2+ a#" !are!rre!t

1a#"2#l, are!rre!t

2a#" !#l, are!rre!t

1#l, i$ !rre!t

N ther !-.i#ati# ) $tate-e#t$ i$ u$e" a$ a !rre!t re$p#$e*

!6 Sli"$ ;+ X+Ya#"


19/20

19

!9 The !-pu#" $h i$ a hr-#e pr"u!e" "uri#g preg#a#!, t $uppre$$ 0ulati#*

HO

CH:

CH:C

CH:

O

(hi!h $tate-e#t$ are !rre!t3

1 (he# rea!te" &ith al'ali#e aueu$ i"i#e+ a ,ell& pre!ipitate i$ .$er0e"*

2 (he# rea!te" &ith LiAlH4+ the pr"u!t )r-e" ha$ : !ar.# at-$ !#0erte")r- $p2h,.ri"i$e" t $p:h,.ri"i$e"*

! (he# rea!te" &ith a# e5!e$$ ) ht a!i"i)ie" + the pr"u!t )r-e" "e$#t "e!luri$e aueu$ .r-i#e*

40 (hi!h rea!ti#$ pr"u!e a# rga#i! pr"u!t !#tai#i#g 1@O at-3

;

E#" ) Paper;

NJC/H2 Che3/01/201! Tu#) "e#

1 H2O

CH:CH2C

OCH2CH

:

O

i# a!i" -e"iu-

1@

&ar-

2

1@

CH:CH2NH2C

O

O H

CH:CH2

!

1@

CH:CH2OHC

O

O H

CH:CH2!#! H2SO4

heat


20/20

20

SH2 P#e'-3 P&pe# 1 A)*e#*

1 D 11 D 21 D !1 B

2 B 12 C 22 B !2 C

! D 1! D 2! C !! A

4 A 14 C 24 D !4 C

8 D 18 A 28 B !8 A

6 C 16 B 26 A !6 D

7 C 17 B 27 D !7 A

B 1 C 2 D ! B

9 D 19 D 29 A !9 D

10 A 20 C !0 C 40 B

2013 NJC H2 Chemistry Paper 1 Questions and Answers

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Transcript of 2013 NJC H2 Chemistry Paper 1 Questions and Answers