Science II M6 Part B(2nd Term).pdf

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B – rpkd 

Ôj úoHdj " ridhk úoHdj " fN!;sl úoHdj hk iEu fldgilskau tla m%Yakhla ne.ska f;dardf.k ms
05'

rEmfha olajd we;af;a ia;%s m%ckl moaO;sfha rEmigykls' 1'

fuys rEmigykg wkqj .%kaÓhla olajd we;af;a l=uk wCIrhlskao@

2'

tu .%kaÓh u.ska i%djh lrk fydafudakh l=ulao@

3'

tu fydafudakh u.ska bgqjk ld¾hh l=ulao@

4'

fuys 'B' jHqyh jeo.;a jkafka ixfiapkhgh' ixfiapkh hkq l=ulao@

5'

wd¾:j pl%fha § äïn fldaIh ;=< isÿjk fjkiaùï olaj k igykla my; olajd we;' Èk 0 Èk 14 Èk 28

¨fghslrK fydafudakh iHqksld W;af;acl fydafudakh

(i)

by; olajd we;s fydafudak i%djh lrk .%kaÓ kï lrkak'

(ii)

olajd we;s igyk wkqj ixfiapkhla isÿùug jvd;a bv we;af;a wd¾;j pl%fha wkqj l=uk Èk mrdihla ;=,o@

(iii)

wd¾;j pl%h hkq l=ulao@

(iv)

.¾NdIh ;=, isÿjk fjkiaù ï m%Odk wjê 3 la hgf;a ±laúh yelsh' wd¾;j wjêh" m%.=Kk wjêh yd i%dù wjêh fõ' (a) fï tla tla wjêfha§ isÿjk m%Odk fjki l=ulao@ (b)

6'

tkï

ta tla tla wjia:dj i|yd fya;=jk fydafudakh kï lrkak'

j¾Okfha§ ffi, úNdckh fõ' (a) cxudkq ffi, úNdckh jkafka l=uk úNdck l%uhlg wkqj o@ (b) (c)

Tn by; i|yka lrk wdldrhg tu ffi, úNdckh ùu w;HdjYH jkafka wehs@ m%Odk ffi, úNdck l%u fol w;r fjkialï 2 la i|yka lrkak ' ^uq¿ ,l=Kq 20&

1

06'

^w&

fm%daáiagd yd *ka.hs hkq j¾.SlrKfha§ yuqj k rdcOdks 2 ls' 1'

fï rdcOdks foflysu Ôùkag fmdÿjk m%Odk ,CIKhla ,sh kak'

2'

(a)

fm%daá iagd rdcOdksfha Ôùkaf.a ,CIK 2 la ,sh kak'

(b)

fm%daá iagd rdcOdksfha Ôùkaf.ka we;s jdishla yd wjdish la ,sh kak'

3'

(a)

olajd we;s Ôúhd wh;ajk rdcOdksh l=ulao@

(b)

tu rdcOdkshg wh;a Ôùka fmkajk ,CIK 2 la ,sh kak' fï Ôùka ñksidg jeo.;a fõ' tfia jeo.;aùug fya;=jla yd ta i|yd jeo.;a kso¾Yl Ôúhl= kï lrkak'

(c)

4'

wm mßirfha yuqj k Ydl imqIam yd wmqIam Ydl f,i fldgia follg fjkal< yelsh ' (a) imqIam yd wmqIam Ydl w;r we;s m%Odk fjki l=ulao@ (b)

^wd&

wU yd uvq îc ork Ydl fõ' we;' ta l=ulao@ myokak'

tfy;a fï îcj, m%Odk fjkila olakg

Ydl m%ckkh lrk m%Odk wdldr 2 ls' tkï ,sx.sl m%ckkh yd j¾Ol m%ckkhhs' 1' ,sx.sl m%ckkh yd j¾Ol m%ckkh w;r we;s m%Odk fjki l=ulao@ 2'

w,sx.sl j¾Ol m%ckk l%uhla f,i noaO lsÍu bÈßm;a l< yelsh' (a) noaO lsÍfï§ yuqj k .%dyl l| yd wkqch myokak' (b)

3'

noaO lsÍfï jdis fukau wjdiso we;' i|yka lrkak'

tu l%ufha jdish la yd wjdishla

'mgl frdamKh' j¾;udkfha nyq,j Ndú;d lrk j¾Ol m%ckk l%uhls' (a) mgl frdamKfha§ ilia lrk mgl frdamK udOHfha wvx.= øjHhla kï lrkak' (b) mgl frdamKh fnfyúka ckm%sh ùug fya;= 2 la olaj kak' ^uq¿ ,l=Kq 20& 'wd' - ridhk úoHdj

07'

^w&

ridhk ;=,djlska lsrd.;a ue.akSishï f,day m%udKfha ialkaOh .a?ï 12 ls' (Mg = 24) 1' (a) fuys wka;¾.; jk Mg ujq, .Kk fldmuKo@ (b) 2'

fuys ;sìh yels Mg , mrudKq .Kk fldmuK úh yelso@

Mg f,dayhls' (a) Mg j, fN!;sl .=Khla (b)

Mg j, ridhksl .=Khla kï lrkak'

2

3'

Mg j,ska we;sjk ,jKhls" ue.akSishï laf,darhsâ (a) ue.akSishï laf,darhsâys ridhksl iQ;%h ,shkak' (b)

Mg j, ,jKhla jk MgSO4 ys ialkaOh 240 g ls' (Mg = 24 , S = 32 , O = 16)

^wd&

(i)

MgSO4 ys idfmaCI wKql ialkaOh fidhkak'

(ii)

fuys we;s MgSO4 ujq, .Kk fldmuKo@

(iii)

fuys we;s MgSO4 wKq .Kk fldmuKo@

olajd we;af;a m%:u whkSlrK Yla;sh olajk igykls' foll uQ,øjH olajd we;' fuys we;s jHdc ixfla; Ndú;d lr ms
m%2':u whkSlrK Yla;sh

2' (a) fuu uQ,øjH w;ßka wdï,sl Tlaihsvhla idokafka l=ulao@ E

(b) tu Tlaihsvfha ridhksl iQ;%h ,shkak'

 D

B

  A 3'

08'

^w&

tys tl <Õ msysá wdj¾;



C

G



F

fuys G yd D w;r ridhksl ixfhda.hla iEfoa' (a)

tu ixfhda.fha ridhksl iq;%h ,sh kak'

(b)

we;sjk ixfhda.fha we;s ridhksl nkaOk j¾.h kï lrkak' ^uq¿ ,l=Kq 20&

A , B , D , E kï uQ,øjH 4 l f;dr;=re my; mßÈh' A B

-

nyqrEmS;dj fmkajk w;r" kefkda ;dlaIKhg Ndú;d fõ' wefudakshd fmdfydr ksmoùug Ndú;d lrk w;r wl%sh jdhqjls'

D E

-

N+ñf;,a ;=, .nvd lrk uQ,øjHhls' p¾udf,amk iE§ug Ndú;d lrk w;r l¿ meye;s >kuQ,øjHhls'

1'

(a) (b)

A uQ,øjH l=ula úh yelso@ 'A' uq,øjH idok m%Odk nyqrEmS wdldr 2 la kï lrkak'

(c)

tu nyqrEmS wdldr folska tla wdldrhl muKla úoHq;a ikakdhl;dj by
2'

(a) (b)

'D' f,i i|yka uQ,øjH l=ulao@ th by; mßÈ N+ñf;,a j, .nvd lr we;af;a wehs@

3'

by; uQ,øjH ish,a," f,day " wf,day " f,daydf,day f,i fjkalr ,sh kak' ^ixfla; muKla Ndú;d lrkak'&

3

^wd&

ridhksl ixfhda. whksl yd iyixhqc hk wdldr 2 u ridhksl nkaOk idohs' (i) fuu ridhksl nkaOk wdldr 2 l we;sjkafka flfiao@ (ii)

P yd Q hkq ridhksl ixfhda. folls' bka tlla whksl jk w;r wfkl iy-ixhqc nkaOk orhs' (a) P yd Q ødjK" úÿ,s n,anhla" negß" C l+re Tng imhd we;' by; ixfhda. w;ßka whksl jkafka l=ula±hs Tn y÷kd.kafka flfiao@ ir, mÍCIKhla úia;r lrkak' (b)

(iii)

whksl ixfhda. i;= jk fjk;a ,CIKhla ,shkak'

HF O%eùh iy-ixhqc nkaOkhla f,i;a CCl 4 ks¾O%eùh iy-ixhqc nkaOkhla f,i;a ie,fla'

fuh myokak' ^uq¿ ,l=Kq 20& 'b' - fN!;sl úoHdj

09'

^w&

fodrla újD; lrk úgo" fodrla jik úgo l%shd;aul jkafka n,>Q¾K uQ,O¾uhhs' 1' n, >Q¾Kfha úYd,;ajh r|d mj;sk m%Odk idOl 2 la kï lrkak' 2'

ÿïßh yria mdrl oud we;s ,S wdjrKhla my; mßÈh' fuys oKafâ ialkaOh 10 kg ls' th rEmfha mßÈ r|jd we;af;a tl fldklg 400 N l n,hla fh§fuks' ^.=re;ajc ;ajrKh 10 ms 2 &

5m 1m

W

400 N

(i)

oKafâ nr fldmuKo@

(ii)

400 N n,h u.ska we;s lrk >Q¾Kh fiúh hq;=j we;' (a) ta i|yd .Ks;uh m%ldYkhla ,shkak' (b)

tu.ska we;sjk n,>Q¾Kh fidhkak'

(iii)

oKafâ nro l%shd;aul jk nj i,lñka oKav my;a lsÍug W f,i fhÈh hq;= n,h .Kkh lrkak'

(iv)

j;=r lrduhla újD; lrk wjia:dfõ n, hq.auh l%shd;aul fõ' hq.auhla hkq l=ulao@

4

n,

^wd&

nhsisl,aj, mdÿldjg yd oïje,g f;,a oukq Tn ±l we;' (i) f;,a ±uQ miq nhsisl,h me§u myiq jkafka wehs@ (ii)

nhsisl,fha wod< ia:dkhg f;,a fkd±óu ksid we;sú h yels wjdisodhl ,laIK 2 la ,shkak'

(iii)

(a)

(b) (c)

10'

¾IK n,h 50 N la úh' fï wjia:dfõ§ nhsisl,h u; l%shd;aul jk iïm%hqla; n,h fldmuKo@ jia;=jla u; l%shd;aul jk >¾IK n,h l=uk idOl u; r|d mj;So@ tÈfkod Ôú;fha§ >¾IK n,h wvqlsÍug fhdok Wml%uhla ,shkak' ^uq¿ ,l=Kq 20&

tla;rd ÿïßhla 72 kmh 1 m%fõ.fhka 'A' ÿïßh ia:dkh miq lrhs'

;j;a ñks;a;=jlska

th ukaokh lrkakg mgka.;a w;r ukaokh hgf;a ;;amr 40 l§ th B ÿïßh ia:dkfha kj;k ,§' 1' A ÿïßh ia:dkh miqlrk úg ÿïßfha m%fõ.h ;;amrhg óg¾ lSho@ 2'

ÿïßfha p,s;h olajk o< m%fõ.-ld, m%ia;drh w¢kak'

3'

wod< ÿïßh ukaokh jkakg mgka.kafka A ÿïßh ia:dkfha isg fldmuK ÿrlg .sh miqo@

4'

ÿïßfha ukaokh fldmuKo@

5'

ÿïßh ukaokh hgf;a fldmuK ÿrla .uka lrk ,oafoao@

6'

A yd B ÿïßh fol w;r ÿr fldmuKo@

7'

wod< ld,h ;=, ÿïßfha udOHhl m%fõ.h fldmuKo@

8'

fuu ÿïßfha ialkaOh" u.Ska o iu. 7000 kg ls' (a) ukaokh wjia:dfõ§ th u; l%shd;aul jQ iïm%hqla; n,h fldmuKo@ (b) by; .Kkhg Tn fhdod.kakd ,oafoa lskï fN!;sl úoHd kshuhlao@

9'

fuu ÿïßfha taldldr m%fõ.fhka .uka lrk úg .uH;dj fiúh hq;=j we;' (a) wod< .uH;dj fiùug .Ks;uh m%ldYkhla ,shkak' (b) wod< .uH;dj .Kkh lrkak' ^uq¿ ,l=Kq 20&

5

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