HBSE Class 12 Question Paper 2019 Chemistry

CLASS : 12th (Sr. Secondary) Code No. 4329
Series : SS-M/2019
Roll No. SET : A
jlk;u foKku
CHEMISTRY
[ Hindi and English Medium ]
ACADEMIC/OPEN
(Only for Fresh/Re-appear Candidates)

Time allowed : 3 hours ] [ Maximum Marks : 70
• d`i;k tk¡p dj ysa fd bl iz'u-i= esa eqfnzr i`"B 16 rFkk
iz'u 21 gSaA
Please make sure that the printed pages in this
question paper are 16 in number and it contains 21
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.
• d`i;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.

4329/(Set : A) P. T. O.

(2) 4329/(Set : A)
• mÙkj-iqfLrdk ds chp esa [kkyh iUuk / iUus u NksMsa+A
Don’t leave blank page / pages in your answer-book.
• 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
Candidates must write their Roll Number on the
question paper.
• d`i;k iz'uksa dk 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 question, 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) LkHkh iz'u vfuok;Z gSaA
(ii) ç'u la[;k 1 esa pkSng (i - xiv) oLrqfu"B iz'u gSAa izR;sd
iz'u 1 vad dk gSA funsZ'kkuqlkj bu iz'uksa ds mÙkj
nhft,A
(iii) ç'u la[;k 2 ls 11 rd vfry?kq mÙkjh; ç'u gSaA çR;sd
iz'u 2 vadksa dk gSA izR;sd iz'u dk mÙkj yxHkx 30
'kCnksa esa nhft,A

4329/(Set : A)

(3) 4329/(Set : A)
(iv) ç'u la[;k 12 ls 18 rd y?kq mÙkjh; ç'u gSaA çR;sd
ç'u 3 vadksa dk gSA izR;sd iz'u dk mÙkj yxHkx 40
'kCnksa esa nhft,A
(v) ç'u la[;k 19 ls 21 rd nh?kZ mÙkjh; ç'u gSaA çR;sd
ç'u 5 vadksa dk gSA izR;sd iz'u dk mÙkj yxHkx 70
'kCnksa esa nhft,A
(vi) iz'u-i= esa lexz :i ls dksbZ fodYi ugha gSA rFkkfi 5
vadksa okys lHkh nh?kZ mÙkjh; iz'uksa esa vkarfjd p;u iznku
fd;k x;k gSA ,sls iz'uksa esa ls vkidks dsoy ,d gh iz'u
djuk gSA
General Instructions : –
(i) All questions are compulsory.
(ii) Question Number 1 consists of Fourteen (i-xiv)
objective type questions carrying 1 mark
each. Answer these questions as per
instructions.
(iii) Question Numbers 2 to 11 are very short
answer type questions of 2 marks each.
Answer these in about 30 words each.
(iv) Question Numbers 12 to 18 are short answer
type questions of 3 marks each. Answer
these in about 40 words each.
(v) Question Numbers 19 to 21 are long answer
type questions of 5 marks each. Answer
these in about 70 words each.

4329/(Set : A) P. T. O.

(4) 4329/(Set : A)
(vi) There is no over all choice. However, internal
choice is given in all long answer type
questions of 5 marks each. You have to
attempt only one of the given choice in such
questions.

[ oLrqfu"B iz'u ]
[ Objective Type Questions ]

fuEufyf[kr cgqfodYih; iz'uksa ds lgh fodYi pqudj mÙkj-
iqfLrdk esa fyf[k, %
Choose the correct option of the following
multiple choice questions and write in answer-
book :

1. (i) vk;ksMhu dk fVaDpj D;k gksrk gS \ 1
(A) Dyksjhu dh 0.2 ls 0.4 Hkkx izfr nl yk[k Hkkx
ty esa lkanzrk
(B) 2-3% CH 3COOH tyh; foy;u
(C) 2-3% vk;ksMhu ,sYdksgkWy&ty esa feJ.k
(D) mi;qZDr esa ls dksbZ ugha
What is tincture of iodine ?
(A) 0.2 to 0.4 ppm aqueous solution of
chlorine
(B) 2-3% aqueous solution of CH 3COOH
(C) 2-3% solution of iodine in alcohol-
water
(D) None of the above

4329/(Set : A)

(5) 4329/(Set : A)
(ii) [NiCl 4 ] 2 − esa Ni dk ladj.k D;k gS \ 1

(A) sp 3d (B) dsp 2
(C) sp 3d 2 (D) sp 3
What is hybridization of Ni in [NiCl 4 ] 2 − ?
(A) sp 3d (B) dsp 2
(C) sp 3d 2 (D) sp 3
(iii) oqV~tZ vfHkfØ;k ds }kjk dkSu&ls dkcZfud ;kSfxd cuk;s
tkrs gSa \ 1

(A) ,sYdksgkWy (B) gkbMªksdkcZu
(C) gSyks,Ydsu (D) gSyks,jhu
Which of the following organic compounds
are formed by Wurtz reaction ?
(A) Alcohols (B) Hydrocarbons
(C) Haloalkanes (D) Haloarenes
(iv) Xykbdkstu fuEu esa ls fdldk mnkgj.k gS \ 1

(A) ikWfylSdsjkbM (B) MkblSdsjkbM
(C) eksukslSdsjkbM (D) izksVhu
Glycogen is an example of :
(A) Polysaccharide (B) Disaccharide
(C) Monosaccharide(D) Protein

4329/(Set : A) P. T. O.

(6) 4329/(Set : A)
(v) gkMhZ&'kqYts+ fu;e ds vuqlkj fuEu esa ls fdldh Å.kZu
{kerk lokZf/kd gS \ 1

(A) Al 3 + (B) Ba 2 +
(C) Na + (D) mi;qZDr esa ls dksbZ ugha
According to Hardy-Schulze rule, which of
the following has highest flocculating
power ?
(A) Al 3 + (B) Ba 2 +
(C) Na + (D) None of the above

fuEufyf[kr iz'uksa ds mÙkj ,d ;k nks okD;ksa esa nhft, %
Answer the following questions in one or two
sentences :
(vi) ZnS fdl izdkj dk LVkWbfd;ksesVªh nks"k n'kkZrk gS \ 1

What type of stoichiometric defect is shown
by ZnS ?

(vii) ukbykWu&6 dh ,dyd bdkbZ dh lajpuk nhft,A 1

Give structure of monomer unit of Nylon-6.
(viii) isIVkbM ca/k ls vki D;k le>rs gSa \ 1

What do you mean by Peptide linkage ?
(ix) fLFkjDokFkh feJ.k dks ifjHkkf"kr dhft,A 1

Define Azeotrope mixture.

4329/(Set : A)

(7) 4329/(Set : A)
(x) fuEu lsy ds fy, usuZ~LV lehdj.k fyf[k, % 1
2+ +
Sn (s )|Sn || H | H 2(g )(1bar )| Pt (s ) .

Write the Nernst equation for following cell :
Sn (s )|Sn 2+ || H + | H 2(g )(1bar )| Pt (s )

(xi) fuEu osx fLFkjkad ls vfHkfØ;k dksfV dh igpku dhft, % 1
k = 3.5 × 10 −5 L mol −1s −1

Identify the reaction order from the
following rate constant :
k = 3.5 × 10 −5 L mol −1s −1
(xii) Cl 2 dh ikuh ds lkFk vfHkfØ;k fyf[k,A 1
Write the reaction of Cl 2 with water.
(xiii) ( p)O2N − C6H 4 − OCH3 dk IUPAC uke fyf[k,A 1

Write IUPAC name of ( p)O2N − C6H 4 − OCH3 .

(xiv) lkbDyksizksisuksu vkWfDle dh lajpuk cukb,A 1
Draw structure of cyclopropanone oxime.

[ vfry?kq mÙkjh; iz'u ]

[ Very Short Answer Type Questions ]

2. ;fn fdlh >hy ds ty dk ?kuRo 1.25 g ml–1 gS rFkk mlesa
92 g Na+ vk;u izfr fdyks ty esa mifLFkr gS] rks >hy esa
Na+ vk;u dh eksyyrk Kkr dhft,A 2

4329/(Set : A) P. T. O.

(8) 4329/(Set : A)
If the density of some lake water is 1.25 g ml–1
and contains 92 g of Na+ ions per Kg of water,
calculate the molality of Na+ ions in the lake.

3. ;fn ,d /kkfRod rkj esa 0.5 ,sfEi;j dh /kkjk 2 ?kaVksa ds fy,
izokfgr gksrh gS] rks rkj esa ls fdrus bysDVªkWu izokfgr gksaxs \ 2
If a current of 0.5 ampere flows through a
metallic wire for 2 hours, then how many
electrons would flow through the wire ?

4. mi;qDr mnkgj.k nsrs gq, /kukRed ,oa _.kkRed viektZdksa esa
vUrj Li"V dhft,A 2
Differentiate between cationic and anionic
detergents giving suitable examples.

5. lgcgqyhdj.k in ¼'kCn½ dh O;k[;k dhft, vkSj nks mnkgj.k
nhft,A 2
Explain the term copolymerization and give two
examples.

6. izksVhu ds foÑrhdj.k ls vki D;k le>rs gSa \ blls izksVhu ds
xq.k/keZ dSls izHkkfor gksrs gSa \ 2

What do you mean by denaturation of a
protein ? How does it affect properties of protein ?

4329/(Set : A)

(9) 4329/(Set : A)
7. jDr IykTek ds lkFk leijklkjh foy;u var%f'kjk esa var%{ksfir
djuk lqjf{kr jgrk gSA le>kb,A 2

It is safe to inject solutions isotonic with blood
plasma intravenously. Explain.

8. 'kq"d lsy dk ukekafdr fp= nsrs gq, ,suksM vkSj dSFkksM ij gksus
okyh vfHkfØ;k,¡ fyf[k,A 2

While giving labelled diagram of dry cell write
reactions taking place at cathode and anode.

9. QkWLQksjl dh rqyuk esa ukbVªkstu Ük`a[kyu xq.kksa dks de iznf'kZr
djrh gS] D;ksa \ 2

Why does nitrogen show catenation properties
less than phosphorus ?

10. ;|fi ,sehuks lewg bysDVªkWujkxh izfrLFkkiu vfHkfØ;kvksa esa vkWFkksZa
,oa iSjk funsZ'kd gksrk gS fQj Hkh ,sfuyhu ukbVªhdj.k }kjk
;Fks"V ek=k esa esVkukbVªks,suhyhu nsrh gSA dkj.k crkb,A 2

Although amino group is o- and p-directing in
aromatic electrophilic substitution reactions,
aniline on nitration gives a substantial amount
of m-nitroaniline. Give reason.

4329/(Set : A) P. T. O.

( 10 ) 4329/(Set : A)
11. gkWQeku czksekekbM vfHkfØ;k ij ,d y?kq fVIi.kh fyf[k,A 2

Write a short note on Hofmann's bromamide
reaction.

[ y?kq mÙkjh; iz'u ]

[ Short Answer Type Questions ]

12. (a) gkbMªkscksjs'ku&vkWDlhdj.k vfHkfØ;k ls vki D;k le>rs
gSa \ bls ,d mnkgj.k ls le>kb,A 2

What is meant by Hydroboration-oxidation
reaction ? Illustrate it with an example.

(b) 1-esfFkylkbDyksgSDlsukWy dh vEy mRizsfjr futZyu dh
izkxqfDr dhft,A 1

Predict the major product of acid catalysed
dehydration of 1-methylcyclohexanol.

13. le>kb, fd [Co(NH 3 )6 ] 3 + ,d vkarfjd d{kd ladqy gS
tcfd [Ni (NH 3 )6 ] 2 + ,d ckg~; d{kd ladqy gSA 3

Explain [Co(NH 3 )6 ] 3 + is an inner orbital
complex whereas [Ni (NH 3 )6 ] 2 + is an outer
orbital complex.

4329/(Set : A)

( 11 ) 4329/(Set : A)
14. mfpr mnkgj.kksa }kjk fuEufyf[kr inksa dks ifjHkkf"kr dhft, %
1½ × 2 = 3
(a) F-dsUnz]
(b) izfryksgpqacdRoA
Define the following with suitable examples :
(a) F-centres,
(b) Antiferromagnetism.
15. Bksl mRizsjdksa ds lUnHkZ esa fuEu dks le>kb, % 1½ × 2 = 3
(a) lfØ;rk]
(b) oj.k{kerkA
Explain the following in context of solid
catalysts :
(a) Activity,
(b) Selectivity.

16. (a) fdlh vfHkfØ;k ds 500 K rFkk 700 K ij osx fLFkjkad
Øe'k% 0.02 S–1 rFkk 0.07 S–1 gSaA Ea dh x.kuk
dhft,A 2
The rate constants of a reaction at 500 K
–1 –1
and 700 K are 0.02 S and 0.07 S
respectively. Calculate the value of Ea.
(b) fdu ifjfLFkfr;ksa esa ,d f}vk.kfod vfHkfØ;k xR;kRed
:i ls izFke dksfV dh vfHkfØ;k dh rjg O;ogkj djrh
gS \ 1
Under what condition a bimolecular
reaction behaves kinetically first order
reaction ?

4329/(Set : A) P. T. O.

( 12 )4329/(Set : A)
17. vip;u }kjk vkWDlkbM v;Ldksa dh vis{kk ikbjkbV ls rk¡cs dk
fu"d"kZ.k vf/kd dfBu D;ksa gS \ 3
Why is the extraction of copper from pyrites
more difficult than that from its oxide ore
through reduction ?

18. ;|fi Dyksjhu ,d bysDVªkWu viu;d lewg gS fQj Hkh ,sjkseSfVd
bysDVªkWujkxh izfrLFkkiu vfHkfØ;kvksa esa vkWFkksZ rFkk iSjk funsZ'kd
gS] D;ksa \ 3
Although chlorine is an electron withdrawing
group, yet it is ortho-para directing in electro-
philic aromatic substitution reactions, why ?

[ nh?kZ mÙkjh; iz'u ]
[ Long Answer Type Questions ]

19. (a) vk;ksMksQkWeZ ijh{k.k ls vki isUVsu-2-vkWu ,oa isUVsu-3-
vkWu esa dSls foHksn djsaxs \ 2

How will you distinguish between Pentan-2-
one and Pentan-3-one with the help of
Iodoform test ?
(b) fuEufyf[kr ifjorZu vki dSls djsaxs \ 1×3=3
How will you bring about following
conversions ?
(i) csUtksbd vEy ls m-ukbVªkscsfUty ,sYdksgkWyA
Benzoic acid to m-Nitrobenzyl alcohol.

4329/(Set : A)

( 13 ) 4329/(Set : A)
(ii) csUtSfYMgkbM ls csUtksQhukWuA
Benzaldehyde to Benzophenone

(iii) csUtksbd vEy ls csUtkekbMA
Benzoic acid to Benzamide.

vFkok
OR

fuEufyf[kr inksa ¼'kCnksa½ dk o.kZu djsa % 2½ × 2 = 5

(a) ,sYMksy la?kuuA
(b) fodkcksZfDlyuA
Describe the following :
(a) Aldol condensation
(b) Decarboxylation

20. (a) fuEufyf[kr izR;sd leqPp; dks lkeus fy[ks xq.kksa ds
vuqlkj lgh Øe esa O;ofLFkr dhft, % 1×3=3
(i) F2, Cl2, Br2, I2 – vkca/k fo;kstu ,UFkSYih ds
c<+rs Øe esaA
(ii) HF, HCl, HBr, HI – vEy lkeF;Z ds ?kVrs Øe
esaA
(iii) NH3, PH3, AsH3, SbH3, BiH3 – {kkjd
lkeF;Z ds ?kVrs Øe esaA
4329/(Set : A) P. T. O.

( 14 ) 4329/(Set : A)
Arrange the following in the order of
property indicated for each set :

(i) F2, Cl2, Br2, I2 – Increasing bond
dissociation enthalpy.

(ii) HF, HCl, HBr, HI – Decreasing acid
strength.

(iii) NH3, PH3, AsH3, SbH3, BiH3 –
Decreasing base strength.

(b) laLi'kZ izØe }kjk H 2SO 4 dh ek=k esa o`f) djus ds
fy, vko';d ifjfLFkfr;ksa dks fyf[k,A 2

Write the conditions to maximize the yield
of H 2SO 4 by contact process.

vFkok
OR

(a) fuEufyf[kr dh lajpuk nhft, % 1×2=2
(i) XeF6
(ii) XeOF 4
Draw the structure of following :
(i) XeF6
(ii) XeOF 4

4329/(Set : A)

( 15 ) 4329/(Set : A)
(b) veksfu;k cukus ds fy, gkcj izØe dk o.kZu dhft,A 3
Describe the Haber process for
manufacture of ammonia.

21. (a) +3 vkWDlhdj.k voLFkk esa vkWDlhÑr gksus ds lanHkZ esa

Mn 2 + ds ;kSfxd Fe 2 + ds ;kSfxdksa dh rqyuk esa vf/kd
LFkk;h D;ksa gS \ 2

Why are Mn 2 + compounds more stable

than Fe 2 + towards oxidation to their +3
state.

(b) vUrjkdk'kh ;kSfxd D;k gSa \ bl izdkj ds ;kSfxd laØe.k
/kkrqvksa ds fy, Hkyh izdkj ls Kkr D;ksa gSa \ 2

What are interstitial compounds ? Why are
such compounds well-known for transition
metals ?

(c) Pm 3 + dk bysDVªkWfud foU;kl fyf[k,A 1

Write electronic configuration of Pm 3 + .

4329/(Set : A) P. T. O.

( 16 ) 4329/(Set : A)
vFkok
OR

(a) vEyh; iksVSf'k;e ijeSaxusV dh fuEu ds lkFk vfHkfØ;k ds
fy, vk;fud lehdj.k fyf[k, % 1×3=3

(i) vkWDlSfyd vEy]
(ii) H 2S ,

(iii) lYQkbV vk;uA
Write ionic equations for the reaction of
acidified potassium permanganate with
following :

(i) Oxalic acid,

(ii) H 2S ,

(iii) Sulphite ion.

(b) ,sfDVukW;Mksa dh vfHkfØ;k'khyrk dk o.kZu dhft,A 2

Describe the reactivity of actinoids.

4329/(Set : A)
S