HBSE Class 12 Question Paper 2024 Chemistry

Haryana Board

QUESTIONPDF

PAPERS
2024

HBSE PYQP

CLASS : 12th (Sr. Secondary) Code No. 1230
Series : SS/Annual Exam.-2024
Roll No. SET : A

jlk;u foKku
CHEMISTRY

[ Hindi and English Medium ]

ACADEMIC/OPEN

(Only for Fresh/Re-appear/Improvement/Additional Candidates)

Time allowed : 3 hours ] [ Maximum Marks : 70

• Ñi;k tk¡p dj ysa fd bl iz'u&i= esa eqfnzr i`"B 32 rFkk iz'u 35 gSaA
Please make sure that the printed pages in this question paper are 32 in number
and it contains 35 questions.

• iz'u&i= esa nkfgus gkFk dh vksj fn;s x;s dksM uEcj rFkk lsV dks Nk= mÙkj&iqfLrdk ds eq[;&i`"B ij
fy[ksaA
The Code No. and Set on the right side of the question paper should be written by
the candidate on the front page of the answer-book.

• Ñi;k iz'u dk mÙkj fy[kuk 'kq: djus ls igys] iz'u dk Øekad vo'; fy[ksaA
Before beginning to answer a question, its Serial Number must be written.

• mÙkj&iqfLrdk ds chp esa [kkyh iUuk@iUus u NksMas+A
Don’t leave blank page/pages in your answer-book.

1230/(Set : A) P. T. O.

(2) 1230/(Set : A)
• mÙkj&iqfLrdk ds vfrfjDr dksbZ vU; 'khV ugha feysxhA vr% vko';drkuqlkj gh fy[ksa vkSj fy[kk mÙkj u
dkVsaA
Except answer-book, no extra sheet will be given. Write to the point and do not
strike the written answer.

• ijh{kkFkhZ viuk jksy ua0 iz'u&i= ij vo'; fy[ksaA jksy ua0 ds vfrfjDr iz'u&i= ij vU; dqN Hkh u
fy[ksa vkSj oSdfYid iz'uksa ds mÙkjksa ij fdlh izdkj dk fu'kku u yxk,¡A
Candidates must write their Roll No. on the question paper. Except Roll No. do not
write anything on question paper and don't make any mark on answers of objective
type questions.

• d`i;k iz'uksa ds mÙkj nsus lss iwoZ ;g lqfuf'pr dj ysa fd iz'u&i= iw.kZ o lgh gS] ijh{kk ds mijkUr bl
lEcU/k esa dksbZ Hkh nkok Lohdkj ugha fd;k tk;sxkA
Before answering the questions, ensure that you have been supplied the correct and
complete question paper, no claim in this regard, will be entertained after
examination.

lkekU; funsZ'k %
(i) iz'u&i= esa dqy 35 iz'u gSaA
(ii) LkHkh iz'u vfuok;Z gSaA
(iii) ;g ç'u&i= ik¡p [k.Mksa esa foHkkftr gS % [k.M&v] [k.M&c] [k.M&l] [k.M&n vkSj [k.M&;
[k.M&;A
(iv) [k.M&v esa vBkjg (1-18) oLrqfu"B iz'u gSaA izR;sd iz'u 1 vad dk gSA
(v) [k.M&c esa lkr (19-25) vfry?kq mÙkjh; ç'u gSaA çR;sd iz'u 2 vadksa dk gSA
(vi) [k.M&l
[k.M&l esa ik¡p (26-30) y?kq mÙkjh; ç'u gSaA çR;sd iz'u 3 vadksa dk gSA
(vii) [k.M&n
[k.M&n esa nks (31 o 32) dsl v/;;u izdkj ds ç'u gSaA çR;sd iz'u 4 vadksa dk gSA
(viii) [k.M&;
[k.M&; esa rhu (33-35) nh?kZ mÙkjh; ç'u gSaA çR;sd iz'u 5 vadksa dk gSA

1230/(Set : A)

(3) 1230/(Set : A)
(ix) iz'u i= esa dksbZ lexz :i ls dksbZ fodYi ugha gSA rFkkfi [k.M&c [k.M&c esa nks iz'uksa es]a [k.M&l esa nks
iz'uksa es]a [k.M&n esa nks
nksuksa iz'uksa esa rFkk [k.M&;
[k.M&; esa rhuksa iz'uksa esa vkarfjd fodYi fn, x, gSaA bu
lc iz'uksa esa ls vkidks dsoy ,d gh iz'u djuk gSA
(x) vad x.kd dk iz;ksx oftZr gSA

General Instructions :

(i) There are 35 questions in all.

(ii) All questions are compulsory.

(iii) This question paper is divided into five Sections : A, B, C, D and E.

(iv) Section-A consist of eighteen (1-18) objective type questions, each of
1 mark.

(v) Section-B consist of seven (19-25) very short answer type questions, each of

2 marks.

(vi) Section-C consist of five (26-30) short answer type questions, each of

3 marks.

(vii) Section-D consist of two (31 & 32) case study type questions, each of

4 marks.

(viii) Section-E consist of three (33-35) long answer type questions, each of

5 marks.

1230/(Set : A) P. T. O.

(4) 1230/(Set : A)
(ix) There is no overall choice. However an internal choice has been provided in
Section-B two questions, Section-C two questions, Section-D both questions
and Section-E all three questions. You have to attempt only one of the given
choices in such questions.

(x) Use of calculator is not permitted.

[k.M & v
SECTION – A

[ oLrqfu"B iz'u ]

[ Objective Type Questions ]

fuEufyf[kr cgqfodYih; iz'uksa ds lgh fodYi pqfu, %
Select the correct option of the following multiple choice questions :

1. gsujh fLFkjkad (KH) dk eku % 1

(A) rkieku c<+us ds lkFk c<+rk gS

(B) rkieku c<+us ds lkFk de gksrk gS

(C) fLFkj jgrk gS

(D) igys c<+rk gS fQj ?kVrk gS

1230/(Set : A)

(5) 1230/(Set : A)
The value of Henry's constant KH :

(A) Increases with increase in temperature

(B) Decreases with increase in temperature

(C) Remains constant

(D) First increases, then decreases

2. fuEufyf[kr esa ls dkSu&lk B&lewg foVkfeu gekjs 'kjhj esa laxfz gr fd;k tk ldrk gS \ 1

(A) foVkfeu B1

(B) foVkfeu B2

(C) foVkfeu B6

(D) foVkfeu B12

Which of the following B-Group vitamin can be stored in our body ?

(A) Vitamin B1

(B) Vitamin B2

(C) Vitamin B6

(D) Vitamin B12

1230/(Set : A) P. T. O.

(6) 1230/(Set : A)
3. oksYVh; lsy ,d oS|rq vi?kVuh lsy ds leku dk;Z djrk gS] tc % 1

(A) Elsy = 0

(B) Elsy > Ecká

(C) Ecká > Elsy

(D) Elsy = Ecká

An electrochemical cell can behave like an electrolytic cell, when :

(A) Ecell = 0

(B) Ecell > Eext

(C) Eext > Ecell

(D) Ecell = Eext

4. tc feFkkby ,sehu] ukbVªl vEy ls vfHkfØ;k djrh gS] rks dkSu&lh xSl fueqZDr gksrh gS \ 1

(A) NH3 (B) N2

(C) H2 (D) C2H6

The gas evolved when methyl amine reacts with nitrous acid is :

(A) NH3 (B) N2

(C) H2 (D) C2H6

1230/(Set : A)

(7) 1230/(Set : A)
5. fdlh vfHkfØ;k dh Ea dh x.kuk dh tk ldrh gS % 1

(A) osx fLFkjkad dk eku ,d fLFkj rki ij Kkr djus ls

(B) osx fLFkjkad dk eku nks vyx rkieku ij Kkr djus ls

(C) Vdjko dh laHkkouk ls

(D) mRizsjd ds izHkko ls

Activation energy of a chemical reaction can be determined by :

(A) determining the rate constant at standard temperature

(B) determining the rate constant at two temperatures

(C) determining probability of collision

(D) using catalyst

6. fuEu esa ls dkSu dSfut+kjks vfHkfØ;k iznf'kZr ugha djrs gSa \ 1

(A)

(B)

(C) HCHO

(D) CH3CHO

1230/(Set : A) P. T. O.

(8) 1230/(Set : A)
Cannizaro's reaction is not given by :

(A)

(B)

(C) HCHO

(D) CH3CHO

7. nqcZy {kkjh; ek/;e esa KMnO 4 iksVSf'k;e vk;ksMkbM dks fdlesa ifjofrZr djrk gS \ 1

(A) I2 (B) IO −

(C) IO 3− (D) IO 4−

When alkaline KMnO 4 is treated with KI, iodide ion is oxidized to :

(A) I2 (B) IO −

(C) IO 3− (D) IO 4−

8. fuEufyf[kr esa ls lcls vf/kd vEyh; dkSu gS \ 1

(A) cSUt+kby ,Ydksgy
(B) lkbDyksgsDlsukWy
(C) fQðukWy
(D) m-DyksjksfQukWy

1230/(Set : A)

(9) 1230/(Set : A)
Which of the following is most acidic ?

(A) Benzyl alcohol

(B) Cyclohexanol

(C) Phenol

(D) m-Chlorophenol

9. fØLVy {ks= foikVu CFSE v"VQyd [CoCl 6 ]4 − ds fy, 18,000 cm–1 gS] rks prq"Qyh; fØLVy
{ks= [CoCl4 ]2− ds fy, D;k gksxk \ 1

(A) 18,000 cm–1

(B) 16,000 cm–1

(C) 8,000 cm–1

(D) 20,000 cm–1

The CFSE for octahedral [CoCl 6 ]4 − is 18,000 cm–1. The CFSE for tetrahedral

[CoCl4 ]2 − will be :

(A) 18,000 cm–1

(B) 16,000 cm–1

(C) 8,000 cm–1

(D) 20,000 cm–1

1230/(Set : A) P. T. O.

( 10 ) 1230/(Set : A)
10. vk;ju (III) DyksjkbM dh mifLFkfr esa VkWY;qbZu] gSykstu ls vfHkfØ;k djds vkWFkksZ rFkk iSjk gSyks ;kSfxd
cukrh gS] ;g vfHkfØ;k gS % 1

(A) bysDVªkWujkxh foyksiu vfHkfØ;k
(B) bysDVªkWujkxh izfrLFkkiu vfHkfØ;k
(C) ukfHkdjkxh izfrLFkkiu vfHkfØ;k
(D) ukfHkdjkxh ;ksxt vfHkfØ;k

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho
and para halo compounds, the reaction is :

(A) Electrophillic elimination reaction

(B) Electrophillic substitution reaction

(C) Nucleophillic substitution reaction

(D) Nucleophillic addition reaction

11. 0.01 M Xywdkst foy;u dh rqyuk esa 0.01 M MgCl2 foy;u dk fgekad dk voueu % 1

(A) ,d tSlk jgsxk

(B) nqxquk gksxk

(C) rhu xq.kk gksxk

(D) pkj xq.kk gksxk

1230/(Set : A)

( 11 ) 1230/(Set : A)
In comparison to a 0.01 M solution of glucose, the depression in the freezing
point of 0.01 M MgCl2 solution is :

(A) remains same

(B) about twice

(C) about three times

(D) about four times

12. vfHkfØ;k A + 2B → C ds fy,] osx = K[A] [B] gSA B dh lkanzrk nqxquh djus ij rFkk [A] dh lkanzrk
leku j[kus ij] osx fLFkjkad ij D;k izHkko iM+sxk \ 1

(A) leku jgsxk

(B) nqxquk gksxk

(C) pkj xq.kk gksxk
(D) vk/kk jg tk,xk

Rate law for the reaction A + 2B → C is found to be Rate = K[A] [B].
Concentration of reactant B is doubled keeping the concentration of A constant,
the value of rate constant will be :

(A) the same

(B) doubled

(C) quadroupled

(D) halved

1230/(Set : A) P. T. O.

( 12 ) 1230/(Set : A)
13. ySUFksukW;M dh lkekU;r% dkSu&lh vkWDlhdj.k voLFkk gksrh gS \ 1

(A) +2 (B) +3

(C) +4 (D) +5

Which of the following oxidation state is common for all lanthanoids ?

(A) +2 (B) +3

(C) +4 (D) +5

14. vfHkdeZd tks ,lhVksu vkSj csatSfYMgkbM nksuksa ls izfrfØ;k ugha djrk gS % 1

(A) lksfM;e gkbMªkstu lYQkbM

(B) fQukby gkbMªkthu

(C) Qsfyax lkWY;w'ku

(D) VkWyus vfHkdeZd

The reagent which does not react with both acetone and benzaldehyde :

(A) NaHSO3

(B) Phenyl hydrazine

(C) Fehling solution

(D) Tollen's reagent

1230/(Set : A)

( 13 ) 1230/(Set : A)
iz'u la[;k 15 ls 18 ds fy, nks dFku fn, x, gSa % vfHkdFku [ A ] rFkk dkj.k [ R ], dFkuksa dks i<+dj
uhps fn;s x;s dksM (A), (B), (C), (D) esa ls iz'uksa dk lgh mÙkj pqusa %

For Question Numbers 15 to 18 given below consists of two statements labelled as

Assertion [ A ] and Reason [ R ]. Read the statements and select the most appropriate

answer from the Codes (A), (B), (C), (D) :

15. vfHkdFku [A] % tc NaCl dks ikuh esa feyk;k tkrk gS] rks fgekad esa ,d voueu ns[kk tkrk gSA

dkj.k [R] % fdlh ?kksy ds ok"i dk ncko de gksus ls fgekad esa voueu gksrk gSA

dksM % 1

(A) [A] rFkk [R] nksuksa lR; gSa vkSj [R], [A] dh lgh O;k[;k gSA

(B) [A] rFkk [R] nksuksa lR; gSa] ysfdu [R], [A] dh lgh O;k[;k ugha gSA

(C) [A] lR; gS] ysfdu [R] xyr gSA

(D) [A] xyr gS] ysfdu [R] lR; gSA

Assertion [A] : When NaCl is added to water, a depression in freezing point is

observed.

Reason [R] : The lowering of vapour pressure of a solution causes depression

in the freezing point.

1230/(Set : A) P. T. O.

( 14 ) 1230/(Set : A)
Code :

(A) Both [A] and [R] are true and [R] is the correct explanation of [A].

(B) Both [A] and [R] are true, but [R] is not the correct explanation of [A].

(C) [A] is true, but [R] is false.

(D) [A] is false, but [R] is true.

16. vfHkdFku [A] % MX6 rFkk MX5L lw= tgk¡ X rFkk L ,dnarqj fyxUM gSa] T;kferh; leko;ork ugha
n'kkZrsA

dkj.k [R] % T;kferh; leko;ork mu ;kSfxdksa esa ugha n'kkZ;h tkrh ftudh milgla;kstu la[;k
6 gSA

dksM % 1

(A) [A] rFkk [R] nksuksa lR; gSa vkSj [R], [A] dh lgh O;k[;k gSA

(B) [A] rFkk [R] nksuksa lR; gSa] ysfdu [R], [A] dh lgh O;k[;k ugha gSA

(C) [A] lR; gS] ysfdu [R] xyr gSA

(D) [A] xyr gS] ysfdu [R] lR; gSA

1230/(Set : A)

( 15 ) 1230/(Set : A)
Assertion [A] : Complexes of MX6 and MX5L type [X and L are unidentate] do
not show geometrical isomerism.

Reason [R] : Geometrical isomerism is not shown by the complexes of
coordination number 6.

Code :

(A) Both [A] and [R] are true and [R] is the correct explanation of [A].

(B) Both [A] and [R] are true, but [R] is not the correct explanation of [A].

(C) [A] is true, but [R] is false.

(D) [A] is false, but [R] is true.

17. vfHkdFku [A] % leku ,sfYdy lewg ds fy, ,sfYdy gSykbMksa dk DoFkukad fuEu izdkj ls ?kVrk gS %
RI > RBr > RCl > RF

dkj.k [R] % ,Ydkby DyksjkbM] ,Ydkby czksekbM] rFkk ,Ydkby vk;ksMkbM dk DoFkukad] leku nzO;eku
okys gkbMªksdkcZu ls vf/kd gksrk gSA
dksM % 1

(A) [A] rFkk [R] nksuksa lR; gSa vkSj [R], [A] dh lgh O;k[;k gSA

(B) [A] rFkk [R] nksuksa lR; gSa] ysfdu [R], [A] dh lgh O;k[;k ugha gSA

(C) [A] lR; gS] ysfdu [R] xyr gSA

(D) [A] xyr gS] ysfdu [R] lR; gSA

1230/(Set : A) P. T. O.

( 16 ) 1230/(Set : A)
Assertion [A] : The boiling point of alkyl halides decreases in the order

RI > RBr > RCl > RF for same alkyl group.

Reason [R] : The boiling point of alkyl halide having chloride, bromide and
iodides are higher than that of the hydrocarbon of comparable
molecular mass.

Code :

(A) Both [A] and [R] are true and [R] is the correct explanation of [A].

(B) Both [A] and [R] are true, but [R] is not the correct explanation of [A].

(C) [A] is true, but [R] is false.

(D) [A] is false, but [R] is true.

18. vfHkdFku [A] % QkWesZfYMgkbM ,d leryh; v.kq gSA

dkj.k [R] % blesa sp2 ladfjr dkcZu ijek.kq gksrk gSA

dksM % 1

(A) [A] rFkk [R] nksuksa lR; gSa vkSj [R], [A] dh lgh O;k[;k gSA

(B) [A] rFkk [R] nksuksa lR; gSa] ysfdu [R], [A] dh lgh O;k[;k ugha gSA

(C) [A] lR; gS] ysfdu [R] xyr gSA

(D) [A] xyr gS] ysfdu [R] lR; gSA

1230/(Set : A)

( 17 ) 1230/(Set : A)
Assertion [A] : Formaldehyde is a planar molecule.

Reason [R] : It contains sp2 hybridized carbon atom.

Code :

(A) Both [A] and [R] are true and [R] is the correct explanation of [A].

(B) Both [A] and [R] are true, but [R] is not the correct explanation of [A].

(C) [A] is true, but [R] is false.

(D) [A] is false, but [R] is true.

[k.M & c

SECTION – B

[ vfry?kq mÙkjh; iz'u ]

[ Very Short Answer Type Questions ]

19. izksVhu dh lajpuk ij foÑrhdj.k dk D;k izHkko gksrk gS \ 2

What is the effect of denaturation on the structure of proteins ?

1230/(Set : A) P. T. O.

( 18 ) 1230/(Set : A)
20. SO 2Cl 2 dks viuh izkjafHkd ek=k ls vk/kh ek=k esa fo;ksftr gksus esa 60 feuV dk le; yxrk gSA ;fn
vfHkfØ;k izFke dksfV dh gks] rks osx fLFkjkad dh x.kuk dhft,A 2

Time required to decompose SO 2Cl 2 to half of its initial amount is 60 minutes. If
the decomposition is a first order reaction, then calculate the rate constant of
the reaction.

vFkok

OR

R → P vfHkfØ;k ds fy, vfHkdkjd dh lkanzrk 0.03 M ls 25 feuV esa ifjofrZr gksdj 0.02 M gks
tkrh gSA vkSlr osx dh x.kuk feuV bdkbZ esa dhft,A 2

For the reaction R → P the concentration of a reactant changes from 0.03 M to
0.02 M in 25 minutes. Calculate the average rate of reaction using units of time
in minutes.

21. fuEu ladyq ksa ds IUPAC uke fyf[k, % 2

(i) [Co(NH 3 )5 CO3 ]Cl

(ii) K 3 [Fe(C 2O 4 )3 ]

Write the IUPAC name of the following coordination compounds :

(i) [Co(NH 3 )5 CO3 ]Cl

(ii) K 3 [Fe(C 2O 4 )3 ]

1230/(Set : A)

( 19 ) 1230/(Set : A)
22. D;k gksrk gS] tc % 2

(a) 'kq"d bZFkj dh mifLFkfr esa esfFky czksekbM dh vfHkfØ;k lksfM;e ls gksrh gS \
(b) ,fFky DyksjkbM dh vfHkfØ;k tyh; KOH ls gksrh gS \

What happens, when :

(a) Methyl bromide is treated with sodium in the presence of dry ether ?

(b) Ethyl chloride is treated with aqueous KOH ?

23. fuEufyf[kr vfHkfØ;kvksa ls izkIr mRiknksa dk vuqeku yxkb, % 2
OC2H5
(i) + HBr →

(ii) (CH 3 )3C − OC 2H 5 + HI →

Estimate the products obtained from the following reactions :
OC2H5
(i) + HBr →

(ii) (CH 3 )3C − OC 2H 5 + HI →

vFkok
OR

le>kb, fd csUthu oy; ls tqM+k OH lewg mls bysDVªkWujkxh izfrLFkkiu ds izfr dSls lfØf;r djrk
gS \ 2
Explain how does OH group attached to a carbon of benzene ring activate it
towards electrophillic substitution reaction.

1230/(Set : A) P. T. O.

( 20 ) 1230/(Set : A)
24. fuEu vfHkfØ;k esa A rFkk B dh lajpuk nhft, % 2
Fe / HCl 2 NaNO + HCl
C 6 H 5 NO 2   
→ A     → B
273 K

Give the structure of A and B in the following reaction :

Fe / HCl 2 NaNO + HCl
C 6 H 5NO 2   
→ A     → B
273 K

25. fuEufyf[kr gSykstu ;kSfxdksa ds ;qxyksa esa dkSu&lk ;kSfxd SN 2 vfHkfØ;k rhozrk ls nsxk \ 2

CH 3
|
(i) CH 3CH 2 CH − CH 3 vFkok CH 3 − C − Br
| |
Br CH 3

(ii) CH3 − CH − CH 2 − CH2 Br vFkok CH3 − CH2 − CH − CH2 Br
| |
CH3 CH3

Which alkyl halide from the following pair would you expect to react more

rapidly by SN 2 mechanism ?

CH 3
|
(i) CH 3CH 2 CH − CH 3 or CH 3 − C − Br
| |
Br CH 3

(ii) CH3 − CH − CH 2 − CH2 Br or CH3 − CH2 − CH − CH2 Br
| |
CH3 CH3

1230/(Set : A)

( 21 ) 1230/(Set : A)
[k.M & l

SECTION – C

[ y?kq mÙkjh; iz'u ]

[ Short Answer Type Questions ]

26. n'kkZb, fd izFke dksfV dh vfHkfØ;k esa 99% vfHkfØ;k iw.kZ gksus esa yxk le; 90% vfHkfØ;k iw.kZ gksus
esa yxus okys le; ls nqxquk gksrk gSA 3

For the first order reaction show that the time required for 99% completion of

first order reaction is twice the time required for the completion of 90%.

27. lkanzrk ?kVus ds lkFk izcy oS|rq vi?kV~; rFkk nqcZy oS|qr vi?kV~; dh eksyj pkydrk esa D;k ifjorZu
vkrk gS \ vkys[k ls le>kb,A 3

Explain the variation of molar conductivity of a strong electrolyte and weak
electrolyte with concentration through graph.

28. fuEufyf[kr ifjorZuksa dks fdl izdkj fd;k tk ldrk gS \ 3

(i) izksihu → izksisu&2&vkWy
(ii) csfUty DyksjkbM → csfUty ,sYdksgkWy
(iii) ,fFky eSXuhf'k;e DyksjkbM → izksisu&1&vkWy
1230/(Set : A) P. T. O.

( 22 ) 1230/(Set : A)
Convert :

(i) Propene into Propan-2-ol

(ii) Benzyl Chloride into Benzyl Alcohol

(iii) Ethyl Magnesium Chloride into Propan-1-ol

29. la;kstdrk vkca/k fl)kar ds vk/kkj ij fuEufyf[kr milgla;kstu lÙkk esa vkca/k dh izÑfr dh foospuk
dhft, % 3

(i) [Fe (CN )6 ]4 −

(ii) [CoF6 ]3 −

Discuss the nature of bonding in the following coordination entities on the basis
of Valence Bond Theory :

(i) [Fe (CN )6 ]4 −

(ii) [CoF6 ]3 −

vFkok
OR

fØLVy {ks= foikVu ÅtkZ D;k gS \ milgla;kstu lÙkk esa d4 d{kdksa dk okLrfod foU;kl ∆0 ds eku ds
vk/kkj ij dSls fu/kkZfjr fd;k tkrk gS \ 3

What is crystal field splitting energy ? How does the magnitude of ∆0 decide the
actual configuration of d orbital in a coordination entity having d 4 configuration.

1230/(Set : A)

( 23 ) 1230/(Set : A)
30. (i) ml ,sekbM dk IUPAC uke fyf[k, tks gkWQeku czksesekbM vfHkfØ;k }kjk izksisues hu nsrk gSA 1

(ii) fuEufyf[kr dks {kkjh; izkcY; ds c<+rs Øe esa fyf[k, % 1

C 6H 5NH 2 , NH 3 , C 2H 5NH 2 , (C 2H 5 )2 NH

(iii) ,sfuyhu ,oa csfUty,sehu esa foHksn ds fy, ,d jklk;fud ijh{k.k nhft,A 1

(i) Write the IUPAC name of the amide that gives propanamine by Hoffmann's
bromamide reaction.

(ii) Arrange the following in the increasing order of basic strength :

C 6 H 5 NH 2 , NH 3 , C 2H 5NH 2 , (C 2H 5 )2 NH

(iii) Give one chemical test to distinguish between aniline and benzylamine.

vFkok
OR

(i) ,sfuyhu dk Pkb esfFky,sehu dh rqyuk esa vf/kd D;ksa gksrk gS \ 1

(ii) csfUt+y DyksjkbM dks 2-Qsfuy,Fksusehu esa ifjofrZr dhft,A 1

(iii) izkFkfed ,sehuksa dk DoFkukad r`rh;d ,sehuksa ls vf/kd D;ksa gksrk gS \ 1

(i) Pkb of aniline is more than that of methylamine, why ?

(ii) Convert Benzyl chloride into 2-phenylethanamine.

(iii) Why do primary amines have higher boiling point than tertiary amines ?

1230/(Set : A) P. T. O.

( 24 ) 1230/(Set : A)
[k.M & n
SECTION – D

[ dsl v/;;u izdkj ds iz'u ]

[ Case Study Type Questions ]

fuEufyf[kr dslksa ( 31 o 32) dk /;kuiwoZd v/;;u dhft, rFkk mlds uhps fn, x, iz'uksa (i-iii) ds mÙkj
nhft,A
Study the following cases (31 & 32) carefully and answer the questions (i-iii) that
follow :

31. v/kZikjxE; f>Yyh ds ek/;e ls de lkanzrk okys ?kksy ls mPp lkanzrk okys ?kksy esa foyk;d dk izokg
vFkok foyk;d ls foy;u esa foyk;d ds izokg dks ijklj.k dgk tkrk gSA ijklj.k ds izØe dks nks ,d

gh izdkj ds vkdkj esa ,d tSls vaMs ysdj le> ldrs gSaA vaMs ds ckgjh vkoj.k ds uhps okyh f>Yyh
v/kZikjxE; f>Yyh gSA dBksj ckgjh vkoj.k dks ruq HCl esa Mkydj mrkjk tkrk gSA ckgjh dBksj vkoj.k
dks mrkjus ds ckn ,d vaMs dks 'kq) ty esa rFkk nwljs vaMs dks ued okys ikuh esa j[kk tkrk gSA dqN
le; i'pkr~ tks vaMk 'kq) ty esa j[kk tkrk gS og Qwy tkrk gS rFkk ued okys ikuh esa j[kk gqvk vaMk
ladqfpr gks tkrk gSA ijklj.k dks jksdus ds fy, foy;u ij vfrfjDr nkc yxk;k tkrk gS ftls ijklj.k
nkc dgrs gSaA ;fn ijklj.k nkc ls vf/kd nkc yxk;k tk,] rks izfrykse ijklj.k dh ifj?kVuk 'kq: gks
tkrh gSA

iz'u %
(i) ;fn ge #f/kj dksf'kdk dks 0.9% ¼nzO;eku@vk;ru½ okys lksfM;e DyksjkbM foy;u esa j[k nsa] rks
dksf'kdk dks D;k gksxk \ 1

1230/(Set : A)

( 25 ) 1230/(Set : A)
(ii) fuEu foys;ksa esa ls fdldk ijklj.k nkc vf/kd gS % 1M iksVSf'k;e DyksjkbM vFkok 1M ;wfj;k \ 1

(iii) izfrykse ijklj.k D;k gS \ ,d v/kZ&ikjxE; f>Yyh dk uke crkb, tks bl ifj?kVuk esa iz;ksx esa
ykbZ tkrh gSA 2

vFkok

ijklj.k nkc fof/k }kjk foys;ksa ds eksyj nzO;eku dSls Kkr fd;s tkrs gSa \ 2

The spontaneous flow of the solvent through a semipermeable membrane from a
pure solvent to a solution or from a dilute solution to a concentrated solution is
called as osmosis. The phenomenon of osmosis can be demonstrated by taking
two eggs of the same size. In an egg the membrane below the shell and around
the egg material is semipermeable. The outer hard shell can be removed by

putting the egg in dilute hydrochloric acid. After removing the hard shell, one
egg is placed in distilled water and the other in a saturated salt solution. After
some time, the egg placed in distilled water swells up while the egg placed in salt
solution shrinks. The external pressure applied to stop the osmosis is termed as
osmotic pressure. Reverse osmosis takes place when the applied external
pressure becomes larger than the osmotic pressure.

Questions :

(i) What happens when RBC's are placed in 0.9% NaCl solution ?

(ii) Which one of the following has higher osmotic pressure : 1M KCl or 1 M
Urea ?

1230/(Set : A) P. T. O.

( 26 ) 1230/(Set : A)
(iii) What is Reverse Osmosis ? Name one SPM which can be used in this
reverse osmosis.

OR

How the molecular mass of substance can be determined by the method
based on measurement of osmotic pressure ?

32. eksuksld
S sjkbM oks dkcksZgkbMªVs gSa ftudks vkSj vf/kd ljy ;kSfxdksa esa ty vi?kfVr ugha fd;k tk ldrkA
mnkgj.k ds rkSj ij Xywdksl] ÝDVkst+] jkbcksl vkfnA vksfyxkslSdsjkbM oks dkcksZgkbMªsV gSa ftuds ty
vi?kVu ls eksuksld S sjkbM dh nks ls nl rd bdkb;k¡ izkIr gksrh gSaA mnkgj.kkFkZ & lqØksl] ekYVksl] ySDVksl
vkfnA ikWfylSdsjkbM ty vi?kVu ij vR;f/kd la[;k esa eksuksld S sjkbM bdkb;k¡ nsrs gSa ftlds mnkgj.k
LVkpZ lsyqyksl gSaA

iz'u %

(i) ml vkca/k dk D;k uke gS] tks nks eksuksld
S sjkbM bdkb;ksa dks tksM+rk gS \ 1

(ii) dkSu&lk MkblSdsjkbM dsoy tarqvksa esa ik;k tkrk gS] ijUrq ikS/kksa esa ugha \ 1

(iii) α-D Xywdksl dh gkoFkZ lajpuk cukb,A 2

vFkok

Xykbdkstu D;k gS \ ;g LVkpZ ls fdl izdkj fHkUu gS \ 2

1230/(Set : A)

( 27 ) 1230/(Set : A)
Monosaccharides are simple carbohydrates that can't be broken further into
smaller units on hydrolysis. For example Glucose, Fructose Ribose etc. Oligo-
saccharides are the carbohydrates which on hydrolysis give two to ten units of
monosaccharides eg. Sucrose, Maltose, Lactose etc. Polysaccharides produce
large number of monosaccharides units on hydrolysis eg. starch cellulose.

Questions :

(i) Name the linkage that holds the two units in the disaccharide.

(ii) Which disaccharide is found only in animals, not in plants ?

(iii) Draw Haworth projection of α-D Glucose.

OR

What is Glycogen ? How it is different from Starch ?

[k.M & ;
SECTION – E

[ nh?kZ mÙkjh; iz'u ]

[ Long Answer Type Questions ]

33. (i) fuEufyf[kr lsy dh 298 K ij usuZ~LV lehdj.k fyf[k, ,oa emf Kkr dhft, % 3

Mg (s )|Mg 2 + (0.001M || Cu 2 + (0.0001M )|Cu (s )
o
EMg 2 +|Mg = −2.37 V
o
ECu 2 +|Cu = 0.34 V

1230/(Set : A) P. T. O.

( 28 ) 1230/(Set : A)
(ii) fdlh foy;u dh pkydrk ruqrk ds lkFk D;ksa ?kVrh gS \ 2

(i) Write the Nernst equation and calculate the emf of the following cell at

298 K :

Mg (s )|Mg 2 + (0.001M || Cu 2 + (0.0001M )|Cu (s )

o
EMg 2 +|Mg = −2.37 V
o
ECu 2 +|Cu = 0.34 V

(ii) Why does the conductivity of a solution decreases with dilution.

vFkok
OR

(i) fuEufyf[kr vfHkfØ;k okys xSYokuh lsy dk ekud lsy foHko ifjdfyr dhft,A vfHkfØ;k ds fy,
∆r G o dh x.kuk Hkh dhft, % 3

2Cr (s ) + 3Cd 2 + (aq ) → 2Cr 3 + (aq ) + 3Cd(s )

o
ECr 3 +|Cr = −0.74V
o
ECd 2 +|Cd = −0.40 V

(ii) dksyjkm'k dk fu;e D;k gS \ bls mnkgj.k nsdj Li"V djsaA 2

1230/(Set : A)

( 29 ) 1230/(Set : A)
(i) Calculate the standard cell potential of galvanic cell in which the following
reaction takes place. Also calculate the value of ∆r G o of the reaction :

2Cr (s ) + 3Cd 2 + (aq ) → 2Cr 3 + (aq ) + 3Cd(s )
o
ECr 3 +|Cr = −0.74V
o
ECd 2 +|Cd = −0.40 V

(ii) Define Kohlrausch's law by taking suitable example.

34. (i) laØe.k /kkrqvksa dh d.ku ,UFkSYih ds eku mPp D;ksa gksrs gSa \ 1

(ii) laØe.k /kkrq dh mPpre vkWDlhdj.k voLFkk vkWDlkbMksa esa iznf'kZr D;ksa gksrh gS \ 1

(iii) ØksekbV v;Ld ls K 2Cr2O7 dks cukus ds fy, fofHkUu inksa dk mYys[k dhft,A 3

(i) Why transition elements have the high enthalpy of atomization ?

(ii) Why highest oxidation state is exhibited in oxoanions of a metal ?

(iii) Indicate the steps in the preparation of K 2Cr2O7 from the chromite ore.

vFkok
OR

(i) vEyh; iksVSf'k;e ijeSaxusV] vkWDlSfyd vEy ls vfHkfØ;k dSls djrk gS \ bl vfHkfØ;k ds fy,
vk;fud lehdj.k fyf[k,A 1

1230/(Set : A) P. T. O.

( 30 ) 1230/(Set : A)
(ii) dkWij ds fy, E o (M 2+ |M ) dk eku /kukRed (0.34 V ) gS] blds laHkkfor dkj.k D;k gSa \ 1

(iii) fuEufyf[kr ds lanHkZ esa ySUFksukW;M ,oa ,sfDVukW;M ds jlk;u dh rqyuk bysDVªkWfud foU;kl]
vkWDlhdj.k voLFkk,¡ rFkk ijek.oh; ,oa vk;fud vkdkj esa djsaA 3

(i) How does acidified permanganate solution react with oxalic acid ? Write

ionic equation for this reaction.

(ii) Why E o (M 2 + |M ) value of copper is the positive value (0.34 V) ?

(iii) Compare Lanthanoids and Actinoids with special reference to electronic

configuration, oxidation state and atomic and ionic size.

35. ,d dkcZfud ;kSfxd ftldk v.kqlw= C9H10O gS] 2, 4-DNP O;qRiUu cukrk gSA VkWyus vfHkdeZd dks
vipf;r djrk gS rFkk dSfut+kjks vfHkfØ;k nsrk gSA izcy vkWDlhdj.k ij og 1, 2-csUthu
Mkb&dkcksZfDlfyd vEy cukrk gSA ;kSfxd dks igpkfu,A bldk IUPAC uke fyf[k,A vfHkfØ;k esa iz;qDr
gksus okyh lHkh jklk;fud lehdj.kksa dks fyf[k,A 5

An organic compound with molecular formula C 9H10O forms 2, 4-DNP. Derivative

reduces Tollen's reagent and undergoes Cannizaro reaction. On vigorous

oxidation, it gives 1, 2 benzene dicarboxylic acid. Identify the organic compound.

Write its IUPAC name. Write all chemical equations involved in reaction.

1230/(Set : A)

( 31 ) 1230/(Set : A)
vFkok

OR

(i) fuEu vfHkfØ;k ds mRikn dh lajpuk fyf[k, % 1

Hg 2 +
CH 3 − C ≡ CH  →
H 2SO4

(ii) lkbDyksizksisukWu vkWfDle dh lajpuk cukb,A 1

(iii) lsehdkcstZ +kbM esa nks NH 2 lewg gksrs gSa] ijUrq dsoy ,d NH 2 lewg gh lsehdkcsZtksu fojpu esa
iz;qDr gksrk gS] ,slk D;ksa \ 1

(iv) fuEufyf[kr ;kSfxdksa dks HCN ds izfr vfHkfØ;k'khyrk ds c<+rs Øe esa O;ofLFkr dhft, % 1

,slhVSfYMgkbM] ,slhVksu] Mkbr`rh;d&C;wfVy dhVksu

(v) ^,sYMksy la?kuu* ij ,d laf{kIr fVIi.kh fy[ksaA 1

(i) Write the structure of product of the following reaction :

Hg 2 +
CH 3 − C ≡ CH  →
H 2SO4

1230/(Set : A) P. T. O.

( 32 ) 1230/(Set : A)
(ii) Draw the structure of : Cyclo-propanone Oxime.

(iii) There are two NH 2 groups in Semicarbazide, but only one is involved in

semicarbazone formation, why ?

(iv) Arrange the following compounds in the increasing order of reactivity

towards HCN :

Acetaldehyde, Acetone, Ditertbutyl Ketone.

(v) Write a short note on 'Aldol Condensation'.

S

1230/(Set : A)

Haryana Board
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