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w'fmd'i' ^W'fm<& Wmldrl iïuka;%Kh - 2015
ridhk úoHdj - I m;%%h ^nyqjrK&
ms
fmkaùu
A fldgi - jHqy
...
(a)
(i) NH2 < N2H4 < NH2OH
(ii) O2 < O3 < H2O2
(iii) SF6 < SF4 < SF2
(iv) Na < Zn < V
^,l=Kq 06 × 5 = 30)
(v) Al(OH)3 < Mg(OH)2 < Ba(OH)2
: :
: :
:
: :
: :
+
: :
:
:
:
: :
:
: :
: :
:
:
: :
:
^,l=Kq 05)
: :
:
: :
: :
: :
: :
:
:
: :
:
(i) :
(ii) :
(b)
:
^fuu jHqyhg ,l=Kq ke;'&
+
:
: :
:
:
^,l=Kq 04 × 3 = 12)
(iii)
O2
-
(iv)
N4
-
p;=ia;,Sh
:
y
:
N
115 < y < 120
(c)
sp3 / 2p
^,l=Kq 03 × 2 = 06)
O
^,l=Kq 06)
100 < x < 110
(i) ,hsudka
(ii)
36 yd
^,l=Kq 05)
327 kJ mol
(iii) 36
327) kJ mol
= 291 kJ mol 1
^,l=Kq 03 + 03)
1
^,l=Kq 03 + 01)
^,l=Kq 03 + 01)
1
(iv) fµdafgdak 1l Yla;sh" E =
=
E
h
^,l=Kq 03 × 2 = 06)
N
y
x
O
-
;,Sh ;%%sfldaKdldr
:
O
-
O5
sp2
:
(v)
N3
=
(v)
= 1311 kJ mol
1
= 48
...
32 × 10 23 × 103 J
= 7
...
626 × 10 34 J s
kJ mol
1
291 kJ mol 1
6
...
(a) (i) (I) NH3
(II) NH3, H2S, HI
(III) H2S yd HI
^,l=Kq 03 × 6 = 18)
Na2S + H2 fyda
2Na + 2NH3
2NaNH2 + H2 fyda
2Na + 2HI
2NaI + H2 fyda
jeämqr 2H2S + 2Na
2NaHS + H2
(ii) (I) Na + H2S
(II) H2S + Cl2
3Cl2 + 2NH3
3Cl2 + 8NH3
3Cl2 + NH3
Cl2 + H2S
Cl2 + 2HI
(III) SO2 + 2H2S
2HCl + S fyda
N2 + 6HCl fyda
2N2 + 6NH4Cl fyda
NCl3 + 3HCl fyda
2HCl + S fyda
I2 + 2HCl
3S + 2H2O
(iii) (NH4)I
iyixhqc nkaOk
whksl nkaOk
odhl iyixhqc nkaOk$odhl nkaOk$ix
...
; bf,lafg%%dak m%%udKh wvq neúka f,dayl nkaOfha m%%n,;dj wvq h'
tksid øjdxlh wfkla 3d uQQ,øjHj, øjdxlhg jvd wvq fõ'
^,l=Kq 02 × 3 = 06)
(iii) (I)
02 + 2 = 04)
(II)
^,l=Kq 02 + 2 = 04)
(iv) (I) hexaaquazinc(II) ion
^,l=Kq 02)
(II)
(v) 7 Zn + 16 HNO3
^,l=Kq 04)
7 Zn(NO3)2 + N2H4 + 6 H2O
^,l=Kq 10)
[ 4jk msgqj n,kak'
3
...
0 × 10 8 mol dm
3
x
[H3O+(aq)][A2 (aq)]
[HA (aq)]
=
2
x
[H3O+(aq)]2
x) mol dm
=
3
x b;d l=vd neúka"
x)
0
...
3
^,l=Kq 20)
(v) E
^,l=Kq 05)
(vi) B fyda D
^,l=Kq 05)
B
ødjKfha H2A fuka u HA o iu idkaøKhkaf
...
0
NH3
^,l=Kq 02 × 3 = 06)
P
Z w
...
(a)
(i)
A
D
CH3
CH3 CH2 C OH
CH3
CH3
CH3 C CH2OH
CH3
^,l=Kq 05 × 2 = 10)
(ii)
CH3
CH3 C CH2 CH2 OH
CH3 CH2 CH2 CH2 CH2OH
H
^,l=Kq 05 × 2 = 10)
(iii)
B
CH3 CH2 CH2 CH2 CH2 OH
^,l=Kq 05)
(iv)
H
H3CH2C
H
CH3
C=C
H
^,l=Kq 05)
(v) cHdñ;sl iudjhúl;dj $ cis - trans iudjhúl;dj
(vi) pent - 2 - ene fyda 2 - pentene
(b)
^,l=Kq 03)
^,l=Kq 03)
(i)
Q
R
O
CH3 C CH3
S
CH3
C OH
CH3
OMgBr
CH3 C CH3
T
CH3
C Br
CH3
^,l=Kq 05 × 4 = 20)
[ 6jk msgqj n,kak'
-6-
(ii) a
- Hg2+ / HgSO4 yd ;kql H2SO4
MgBr
/ dry ether
b
-
c
- HCl(aq) fyda H3O+(aq) fyda H+ / H2O
d
- CH3OH / Na
(iii) m%%;sl%shdj
1
^,l=Kq 03 × 4 = 12)
m%%;sl%shd jr®
...
(a)
(i) mQQr®K f,i ñY%% jk A yd B
n,"
f (A B) = f (A A) = f (B B)
^,l=Kq 06)
fyda
(ii) A(l)
A(g)
B(g)
B(l)
^,l=Kq 02 × 3 = 06)
(iii) A
r2 kï"
r1
r1
r2
= K1 [A(l)]
= K2 [A(g)]
...
XA
K2
PA
(iv)
=
=
K
...
xA
(b) (i) A ujq,
...
Kk" nB
=
(ii)
^,l=Kq 12)
^,l=Kq 06)
0
...
314 × 10 2 dm3 mol
0
...
157 × 10 2 dm3 mol
A(g)
B(g)
B(l)
PA
=
10 mol
^,l=Kq 04)
1
=
20 mol
^,l=Kq 04)
XA(g) = 0
...
PT
=
PA
=
0
...
0
^,l=Kq 05)
PB
fyda
XB(g)
PB
= 0
...
00 × 105
= 2
...
4 × 105 Pa
nA
=
6 × 104 Pa × 100 × 0
...
314 J mol 1 k 1 × 300 K
nA
B jdhqjg
PA
=
=
nB
=
2
...
8314 × 10 3 m3
8
...
XA
=
PA° × 8
20
6 × 104 × 20 Pa
8
1
...
5 × 105 Pa
^,l=Kq 05)
PB
XB
2
...
4 × 106 Pa × 100
...
8314 × 10 3 m3 =
8
...
2 K
(II) PA
^,l=Kq 02)
=
=
=
=
n
^,l=Kq 03)
35 mol
35 mol
35 mol
5 mol
^,l=Kq 04)
=
=
=
PT
...
4 × 106 Pa × 5
35
2 × 105 Pa
^,l=Kq 03)
=
=
1
...
4 × 106 Pa × 20
35
8 × 105 Pa
^,l=Kq 03)
=
P2C(g)
PA
5
2
= (4 × 10 5Pa)
2 × 10 Pa
=
8 × 105 Pa
^,l=Kq 05)
^,l=Kq 03)
[ 9jk msgqj n,kak'
-9-
(i)
(c)
X
X(H2O)
KD =
B;r®(50 cm3)
X(B;r®)
[X] B;r®
^,l=Kq 04)
^,l=Kq 05)
[X] c,h
H2O(200 cm3)
(ii) m
16
=
16
=
n2
n1
X ujq,
...
Kk n2 o kï"
n2
× 1000 mol dm
50
n1
× 1000 mol dm
200
n2
×4
n1
4
^,l=Kq 20)
1
=
X m%%udKh wdrïNl m%%udKfha Nd
...
hla f,i
= 1
125
X m%%udKh m%%;sY;hla f,i ^,l=Kq 15)
124 × 100%
125
=
99
...
(a)
(i) (I)
1
CH4(g) + CO2(g)
2 CO(g) + 2H2(g) ; x kJ mol
C(s) + H2O(g)
CO(g) + H2(g)
; 125 kJ mol
1
(2)
C(s) + O2(g)
CO2(g)
; 394 kJ mol
1
(3)
CH4(g) + 2O2(g)
CO2(g) + 2H2O(l) ; 800 kJ mol
1
(4)
(2) × 2
2C(s) + 2H2O(g)
2CO(g) + 2H2(g)
×( 125) kJ mol
250 kJ mol
+ 250 kJ mol
1
1
(1)
^,l=Kq 03 × 4 = 12)
1
2CO(g) + 2H2(g)
2C(s) + 2H2O(l)
(5)
^,l=Kq 02 × 3 = 06)
(1) + (5)
CH4(g) + CO2(g)
2O2(g) + CH4(g) + CO2(g)
800 kJ mol
(250 + x) kJ mol
1
(250 + x) kJ mol
1
1
2 C(s) + 2H2O(g)
2 C(s) + 2H2O(g) + 2O2(g)
394) kJ mol
2CO2(g) + 2H2O(l)
1
^,l=Kq 02 × 3 = 06)
[ 10jk msgqj n,kak'
- 10 -
fyia kshufhka ;
250 kJ mol 1 + x + 2( 394) kJ mol
x = ( 800 + 788
x =
(b) (i)
wdrïNl X ujq,
262 kJ mol
=
800 kJ mol
1
^,l=Kq 02 + 1 = 03)
1
^,l=Kq 02 + 1 = 03)
1
2
...
0 × 50 × 20 mol
1000
100
= 50 cm3 + 100 cm3 + 50 cm3 = 200 cm3
X
=
20
( 2 × 50××100 ) mol × ( 1000 ) dm
200
1000
= 0
...
025) mol dm 3 s
1
0
...
h
(c)
(i)
ìhqfrÜgqj
(ii)
^,l=Kq 02 × 8 = 16)
* ìhqfrÜgqfõ lrduh fyd¢ka jid ;sìh hq;= h'
* Mg
iïmQQr®Kfhka HCl wï,fhka mqrjd ;sìh hq;= h'
^,l=Kq 03)
^,l=Kq 03 × 2 = 06)
[ 11jk msgqj n,kak'
- 11 -
^,l=Kq 02)
(iii) (I) H2
PV = nRT fh°fuka"
5
6
3
nH = 1
...
0013 mol
1
2
8
...
0013 mol
2
(III) n = m
M
3
0
...
15 g mol
Ar(Mg)
=
26
...
fkdfõ'
Mg
^,l=Kq 06)
7
...
auh m%%odkh ls¯ug we;s yelshdj Tlaiscka u; we;s tlir bf,lafg%%dak hq
...
ska bf,lafg%%dak N
bf,lafg%%dak m%%odkh ls¯ug we;s yelshdj by< fõ'
NH2
kuq;a
ys N ys mrudKqj u; we;s tlir bf,lafg%%dak hq
...
fnkaiSka j,fhys úisr mj;sk ksid khsÜrcka mrudKqj u;
+
NH2
( )
+
NH2
:
+
NH2
( )
:NH2
NH2
( )
khsÜrcka mrudKqj u; '+'
tksid bf,lafg%%dak m%%odkh ls¯ug we;s yelshdj wvq h'
(b)
(i)
^,l=Kq 20)
(I)
C N CH2
H
Br2
FeBr3
Br
CH2Cl
CH2NH2
idkaø
NH3
Mg /
úh,s B;r®
PCl5
=
O
MgBr
CH2OH
1) HCHO
2) H3O+
C
PCC
^,l=Kq 04 × 12 = 48)
(II)
CH3CH = CH2
HBr
H
Br
CH3CH CH3
Mg /
úh,s B;r®
jeämqr
MgBr
CH3 CH CH3
HBr /
H2O2
H3O+
CH3CH2 CH2Br
c,Sh
KOH
CH3CH2 C H
PCl5
O
=
O
=
CH3CH2CH2OH
H+/KMnO4
CH3CH2 C Cl
OH
H3C
CH C CH2 CH3
H3C
CH
H3C CH3
^,l=Kq 04 × 13 = 52)
(ii) (I) Na f,dayh iu
...
(a)
(i)
(ii)
A
B
C
D
E
F
=
=
=
=
=
=
Al
AlCl3
Al(OH)3
Al2O3
NaAlO2 / Na[Al(OH)4]
H2
Al2O3 + 2NaOH
^,l=Kq 06 × 3 = 18)
2NaAlO2 + H2O
fyda
Al2O3 + 2NaOH + 3H2O
(iii)
^,l=Kq 05)
2Na[Al(OH)4]
AlCl3
AlCl3 + 3H2O
Al(OH)3 + 3HCl
fyda
Al(OH)3 + H+ + Cl
AlCl3 + 3H2O
HCl m%%n, wï,hls'
fï ksid udOHfha H+/ H3O+ idkaøKh jeä fõ'
(iv) AlCl3 wKq
(b)
(i)
E
Q
R
L
T
U
V
=
=
=
=
=
=
=
Cl
Cl
Al
Cl
Cl
Cl
†h
...
dvke
...
h md,kh$ whk yqjudre friskj, mqkr®ckkh
i,aµr® iys; bkaOk oykfha ° ksl=;a jk i,aµr® Tlaihsv WodiSk ls¯u
YS;ldrlhla f,i fh°u
rnr®j, m%%;sleáldrlhla f,i fh°u
^ñka ´kE u folla&
^,l=Kq 03 × 2 = 06)
[ 14jk msgqj n,kak'
- 14 (c)
(i)
X
Y
=
=
BaSO4 /
CuI / Cu2I2 / fldmr®(I) whvhsâ$ lshqm%ia whvhsâ
S2 + 8NO3 + 8H+
SO42 + 8NO2 + 4H2O
Fe2+ + NO3 + 2H+
(ii)
^,l=Kq 03 × 2 = 06)
Fe3+ + NO2 + H2O
Ba2+ + SO42
BaSO4
2Cu + 2I
2Cu+ + I2
fyda
2Cu2+ + 2I
Cu22+ + I2
fyda 2Cu2+ + 4I
2CuI + I2
fyda
2Cu2+ + 4I
Cu2I2 + I2
2+
3+
2+
2Fe + 2I
2Fe + I2
I2 + 2S2O32
(iii)
^,l=Kq 06 × 2 = 12)
2I +S4O62
=
0
...
0008 mol
idïm,fha wvx
...
0008 × 250 mol
25
S ialkaOh
=
=
=
0
...
008 mol × 32 g mol
0
...
0381 g
190
...
256 g × 100
1
...
6%
0
...
= Cu ujq, m%%udKh =
Cu ialkaOh
=
=
=
Cu m%%;sY;h
0
...
127 g × 100
1
...
7%
0
...
00 mol
1000 × 2
=
1
0
...
00 mol
1000
I2 ujq,
0
...
002 mol × 63
...
127 g
0
...
00 cm3 l we;s Fe3+ ujq, m%%udKh
0
...
0001 mol
=
(
=
Fe3+ u
...
ska we;sjk I2 ujq, m%%udKh
0
...
0003 mol × 2
=
0
...
= Fe ujq, m%%udKh
=
0
...
006 mol
0
...
336 g
Fe m%%;sY;h
=
n (S)
=
=
=
=
^,l=Kq 20)
33
...
(a)
0
...
000 g
=
ffjl,amsl l%%uh (
1
n
n (Cu)
0
...
002 mol
0
...
,a
1
CaO
G
H 2O
NaHCO3
K
Ca(OH)2
I
Na2CO3
úrxck
l=vq
^,l=Kq 13 × 3 = 39)
(ii)
l%%shdj,s 1 :
l%%shdj,s 2 : O2 iu
...
m%%;sl%shdj
l%%shdj,s 3 : Nd
...
Ca(OH)2
...
2H2O
^,l=Kq 08)
^,l=Kq 05)
(i) N2
^´kE u folla&
(ii) NO, NO2, , N2O, N2O4
^,l=Kq 05 × 2 = 10)
(iii) wl=Kq
...
ska jd;fha we;s wfkla ridhk øjH LKavl njg m;a lrk w;r tajd
we,aäyhsv" PAN, PBN wd†h ksmofjk m%%;sl%shd iuQQyhla wrUhs'&
NO(g) + O3(g)
O2(g)
NO2(g) + O(g)
NO2(g) + O2(g)
2O(g)
(1)
(2)
NO(g) + O2(g)
(3)
(1) × 2 + (2) + (3) × 2
2O3(g)
^,l=Kq 12 × 2 = 24)
3O2(g)
(vi)
N wvx
...
(a)
(i)
Hg2Cl2(s) + 2e
^,l=Kq 08)
2Hg(l) + 2Cl (aq)
(ii)
Hg(l), Hg2Cl2(s) / Cl (aq) (1
...
0 mol dm 3) / Cl2(g) (1 atm), Pt(s)
(iii)
E
(i)
E
1
...
12 V
cathode
^,l=Kq 08)
anode
V
^,l=Kq 12)
wefkdav m%%;sl%shdj
Mg2+(aq) + 2e
Mg(s)
lef;dav m%%;sl%shdj
2e + 2H2O(l)
H2(g) + 2OH (aq)
iuia; m%%;sl%shdj
(ii)
^,l=Kq 05 × 3 = 15)
Mg2+(aq) + 2OH (aq) + H2(g)
Mg(s) + 2H2O(l)
Mg2+(aq) + 2OH (aq)
Mg(OH)2(s)
Mg2+ iy OH 1 ; 2 wkqmd;fhka iEfoa' wdú,;dj we;s jk
wjia:dfõ °" tkï ødjKh Mg(OH)2j,ska ix;Dma; jk wjia:dfõ ° [Mg2+] = x kï
4
...
5 × 10 5 mol
1000
2
...
5 × 10 5 × 96500 × 2 C
50 × 10 3 A
^,l=Kq 30)
9650 s
^,l=Kq 05)
(iii)
(c)
(i)
2Mn2+ + 5PbO2 + 4H+
^,l=Kq 10)
2MnO4 + 5Pb2+ + 2H2O
^,l=Kq 04)
(ii)
(10 cm3) iudk neúka
(iii)
X ys 5 cm3l MnO4 ujq,
mMn
m %
0
...
05 × 8 × 250 mol
1000
5
0
...
02 mol
4
= nMnO
4
0
...
0 g
= 36
...
fkaÜ ixY=oaO ixfhda
...
ekSu'
;kql H2SO4 u
...
ska wkqudmkh ls¯u'
60°Cys mj;ajd