HBSE Class 12 Question Paper 2018 Chemistry

CLASS : 12th (Sr. Secondary) Code No. 3629
Series : SS-M/2018
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 : 60
• d`i;k tk¡p dj ysa fd bl iz'u-i= esa eqfnzr iz'u 18 gSaA
Please make sure that the printed question paper are contains 18
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.

• 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

3629/(Set : A) P. T. O.

(2) 3629/(Set : A)
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; funs
funsZ'k %
(i) LkHkh iz'u vfuok;Z gSaA
(ii) izR;sd iz'u ds vad mlds lkeus n'kkZ, x, gSaA
(iii) ç'u la[;k 1 esa ckjg (i - xii) cgqfodYih; iz'u gSAa izR;sd 1 vad dk gSA ftuds lgh
mÙkj viuh mÙkj&iqfLrdk esa fy[kus gSaA
(iv) ç'u la[;k 2 ls 10 rd vfry?kq mÙkjh; ç'u gSaA çR;sd 2 vadksa dk gSA izR;sd iz'u
dk mÙkj yxHkx 30 'kCnksa esa nhft,A
(v) ç'u la[;k 11 ls 15 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
(vi) ç'u la[;k 16 ls 18 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
(vii) 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) Marks for each question are indicated against it.
(iii) Question Number 1 consists of twelve (i-xii) multiple choice questions
carrying 1 mark each. Candidates have to write the correct answer
in their answer-book.

3629/(Set : A)

(3) 3629/(Set : A)
(iv) Question Numbers 2 to 10 are very short answer type questions of 2
marks each. Answer these in about 30 words each.

(v) Question Numbers 11 to 15 are short answer type questions of 3
marks each. Answer these in about 40 words each.

(vi) Question Numbers 16 to 18 are long answer type questions of 5
marks each. Answer these in about 70 words each.

(vii) 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.

1. (i) fofy;Elu la'ys"k.k fuEu esa fdldks cukus dh fof/k gS \ 1
(A) ,sYdksgkWy (B) ,sehu

(C) dhVksu (D) bZFkj
Williamson Synthesis is used to prepare :

(A) Alcohol (B) Amine

(C) Ketone (D) Ether

O
(ii) ;kSfxd dk IUPAC uke fyf[k,A 1
CH3
O
Write the IUPAC name of this compound.
CH3

(iii) [Cr (NH 3 )3 Br Cl I ] milgla;kstd ;kSfxd dk IUPAC uke fyf[k,A
1

3629/(Set : A) P. T. O.

(4) 3629/(Set : A)
Write IUPAC name of coordinate compound [Cr (NH 3 )3 Br Cl I ]

(iv) mRizsjd vfHkfØ;k ds osx dks c<+krk gS] rks osx fLFkjkad ds eku ij D;k izHkko gksxk \
1
(A) c<s+xk (B) ?kVsxk
(C) fLFkj jgsxk (D) buesa ls dksbZ ugha
A catalyst increases the rate of reaction, then what will be the
effect on rate constant ?

(A) Increases (B) Decreases

(C) Not Changed (D) None of these

(v) fuEu esa ls dhysV (Chelate) fyxUM gS % 1

(A) OH − (B) H 2NCH 2CH 2NH 2

(C) Cl − (D) CN −
In the following chelating ligand is

(A) OH − (B) H 2NCH 2CH 2NH 2

(C) Cl − (D) CN −

OCH3

+ HI  → A + B vfHkfØ;k esa A o B gS % 1
373 K
(vi)

(A) C 6H 5 I , CH 3OH

(B) C6H 5OH , CH 3I

(C) C6H 5CΗ 2OH , CH 3I

3629/(Set : A)

(5) 3629/(Set : A)
(D) CH 3CH 2I , C6H 5OH
OCH3
373 K
In the Reaction + HI  → A + B A and B are :

(A) C 6H 5 I , CH 3OH

(B) C6H 5OH , CH 3I

(C) C6H 5CΗ 2OH , CH 3I

(D) CH 3CH 2I , C6H 5OH

(vii) osx fLFkjkad eksy yhVj–1 lsd.M–1 fuEu dksfV dh vfHkfØ;k ds fy, gksxk % 1

(A) 'kwU; (B) izFke
(C) f}rh; (D) dksbZ Hkh ugha
If rate constant for a Reaction is mole litre–1 second–1 then order of
reaction is :
(A) Zero order (B) First order
(C) Second order (D) None of these

(viii) fuEufyf[kr ;kSfxdksa esa lcls de DoFkukad fdldk gS \ 1

(A) H 2Se (B) H 2Te

(C) H 2O (D) H 2S

In the following compounds which has minimum boiling point ?
(A) H 2Se (B) H 2Te

(C) H 2O (D) H 2S

3629/(Set : A) P. T. O.

(6) 3629/(Set : A)
(ix) fuEu esa ls lcls de vEyh; gksxk % 1

(A) CH 3OH (B) (CH 3 )2CHOH

(C) CH 3CH 2OH (D) (CH 3 )3COH

Which is weakest acid in the following ?

(A) CH 3OH (B) (CH 3 )2CHOH

(C) CH 3CH 2OH (D) (CH 3 )3COH

(x) ;kSfxd K 3 [Cr (C2O4 )3 ] esa milgla;kstu la[;k D;k gksxh \ 1
(A) 3 (B) 6
(C) 4 (D) 2
What is the coordination number in the K 3 [Cr (C2O 4 )3 ] coordinate

compound :
(A) 3 (B) 6
(C) 4 (D) 2
conc . H 2SO 4
(xi) CH 3CH 2OH → A′, A′ gksxk % 1
413 K

(A) CH 2 = CH 2 (B) C 2H 5OCH 3

(C) (C 2H 5 )2O (D) CH 3CH 2CH 2CH 3

conc . H 2SO 4
CH 3CH 2OH → A′, A′ will be :
413 K

(A) CH 2 = CH 2 (B) C 2H 5OCH 3

(C) (C 2H 5 )2O (D) CH 3CH 2CH 2CH 3

3629/(Set : A)

(7) 3629/(Set : A)
(xii) fuEufyf[kr ;kSfxdksa esa dkSu SN 2
fØ;kfof/k vf/kdre rhozrk ls djsxk \
1
(A) CH 3Br (B) CH 3Cl

(C) CH 3CH 2Cl (D) (CH 3 )2CHCl

SN 2 reaction will be fastest in :
(A) CH 3Br (B) CH 3Cl

(C) CH 3CH 2Cl (D) (CH 3 )2CHCl

2. rkilq?kV~; o rkin`<+ cgqydksa esa foHksn dhft,A 2

Write difference between Thermoplastic and Thermosetting polymers.

3. gsujh fu;e ds nks mi;ksx fyf[k,A 2

Give two applications of Henry's Law.

4. 'kkVdh nks"k dks mnkgj.k lfgr le>kb;sA 2
Explain Schottky defect with an example.

5. ;fn 4.0 xzke NaOH, 500 feyh foy;u esa ?kqyk gks] rks foy;u dh eksyjrk Kkr dhft,A
2
4.0 gm of NaOH, dissolved in 500 ml of solution, calculate molarity of
the solution.

3629/(Set : A) P. T. O.

(8) 3629/(Set : A)
6. 0.05 M NaOH foy;u dk izfrjks/k 31.6 Ω gSA bldk lsy fLFkjkad 0.357 cm–1 gSA
bldh pkydrk o eksyj pkydrk Kkr djsaA 2

The resistances of 0.05 M NaOH solution is 31.6 Ω and its cell
constant is 0.357 cm–1. Calculate its conductivity and molar
conductivity.

7. iz'kkard vkS"k/k fdls dgrs gSa \ mi;ksx fyf[k,A 2

What is Tranquilizer ? Give use.

8. QSjkMs ds oS|qr vi?kVu ds f}rh; fu;e dks le>kb,A 2

Discuss Second Law of Faradey Law of electrolysis.

9. Nn~e ,dk.kqd vfHkfØ;k dks mnkgj.k lfgr ifjHkk"kk djsaA 2

Define Pseudounimolecular reaction with an example.

10. fuEu inksa dks ifjHkkf"kr dhft, % 2

(i) F-dsUnz
(ii) ,dd dksf"Bdk
Define the following terms :
(i) F-centre
(ii) Unit Cell

11. /kkrqvksa ds 'kks/ku ds fy, eaMy ifj"dj.k fof/k dh O;k[;k dhft,A3
Explain Zone refining method for refining of metals.

3629/(Set : A)

(9) 3629/(Set : A)
12. fuEufyf[kr vfHkfØ;k,¡ fyf[k, % 3
(a) LokVZ~t vfHkfØ;k
(b) lSSUMes;j vfHkfØ;k
(c) oqVZt~ -fQfVax vfHkfØ;k
Write the following reactions :
(a) Swarts reaction
(b) Sandmeyer reaction
(c) Wurtz-fitting reaction

13. lekaxh mRizsj.k o fo"kekaxh mRizsj.k ls vki D;k le>rs gSa \ 3

What do you understand by homogeneous catalysis and heterogeneous
catalysis.

14. fuEufyf[kr inksa dks ifjHkkf"kr dhft, % 3
(a) ,suksej
(b) isIVkbM cU/k
(c) foÑrhdj.k
Define the following terms :

(a) Anomer

(b) Peptide Bond

(c) Reducing sugar

15. fuEu dks iwjk dhft, % 3
CH3

3629/(Set : A) P. T. O.
NH2

( 10 ) 3629/(Set : A)
NaNO2 / HCl H 2O KMnO4
→ ? ? → ?
273 − 278 K H 3PO2 OH −

Complete the following :
CH3
NaNO2 / HCl H 2O KMnO4
→ ? ? → ?
273 − 278 K H 3PO2 OH −
NH2

16. dkUVsDV fof/k }kjk H 2SO4 cukus dh fof/k dk o.kZu dhft,A bldh lajpuk Hkh fyf[k,A 5

Explain contact process for manufacturing sulphuric acid. Draw its
structures.

vFkok
OR

(a) H 3PO3 o H 3PO 4 v.kqvksa dh lajpuk,¡] {kkjdrk fyf[k,A 3

(b) ukbVªkstu ds vlkekU; xq.kksa dh O;k[;k dhft,A 2

(a) Draw structures of H 3PO3 and H 3PO 4 Molecules. Also give their

basicity.

(b) Discuss Abnormals behaviour of Nitrogen.

3629/(Set : A)

( 11 ) 3629/(Set : A)
17. laØe.k /kkrq,¡ ds lanHkZ esa fuEufyf[kr dks Li"V dhft,A 5

(i) vkWDlhdj.k voLFkk,¡
(ii) mRizsjdh; xq.k
Explain the following with reference to Transition metals :

(i) Oxidation states

(ii) Catalytic properties

vFkok

OR

(a) vEyh; KMnO4 fuEu ls vfHkfØ;k djus ij D;k gksxk \ 3

(i) H 2S

(ii) KI

(iii) FeSO 4

(b) Zn, Cd o Hg dks laØe.k /kkrq,¡ ugha ekuk tkrk gSA dkj.k fyf[k,A
2

(a) What happens when acidified KMnO4 react with :

(i) H 2S

(ii) KI

3629/(Set : A) P. T. O.

( 12 ) 3629/(Set : A)
(iii) FeSO 4

(b) Zn, Cd and Hg metals are not considered as transition metals.
Give reason.

18. (a) QhukWy o csUtksbd vEy esa foHksn djus ds fy, jklk;fud ijh{k.k nhft,A 2

(b) csUthu dks fuEufyf[kr esa ifjofrZr dhft, % 3

(i) ,slhVksQhuksu
(ii) cSUtsfYMgkbM

(iii) csUtksQhuku

(a) Give a chemical test to distinguish between Phenol and Benzoic
acid.

(b) Convert Benzene into :

(i) Acetophenone

(ii) Benzaldehyde

(iii) Benzophenone

3629/(Set : A)

( 13 ) 3629/(Set : A)
vFkok
OR

fuEufyf[kr ij laf{kIr uksV fyf[k, % 5

(i) gsyQksykMZ tsfyaLdh vfHkfØ;k
(ii) ,sYMksy la?kuu
Write short notes on the following :

(i) Hell-Volhard-Zelinsky Reaction

(ii) Aldol Condensation

S

3629/(Set : A) P. T. O.