HBSE Class 12 Chemistry Question Paper 2018 Set B

CLASS : 12th (Sr. Secondary) Code No. 3629
Series : SS-M/2018
Roll No. SET : B
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 : B) P. T. O.

(2) 3629/(Set : B)
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) 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 : B)

(3) 3629/(Set : B)
(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) dkSu lk foVkfeu ty esa foys; gS \ 1
(A) foVkfeu D (B) foVkfeu K

(C) foVkfeu E (D) foVkfeu B
Which Vitamin is soluble in water ?

(A) Vitamin D (B) Vitamin K

(C) Vitamin E (D) Vitamin B

(ii) ,d eksy MnO 4− dks Mn 2+ esa vipf;r djus ds fy, fdrus QSjkMs (F) dh
vko';drk gksxh \ 1

(A) 5F (B) 2F

(C) 1F (D) 7F
−
Number of Faradays (F) required to reduce 1 mole of MnO 4 into

Mn 2+ .

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

(4) 3629/(Set : B)
(A) 5F (B) 2F

(C) 1F (D) 7F

(iii) fuEufyf[kr osx fLFkjkad ls vfHkfØ;k dh dksfV Kkr dhft,A
−4
K = 2.6 × 10 L Mol S −1 −1
% 1

(A) izFke (B) 'kwU;
(C) f}rh; (D) dksbZ Hkh ugha
Identify the order of Reaction from the given rate
constant K = 2.6 × 10 −4 L Mol −1S −1 :

(A) First (B) Zero

(C) Second (D) None of these

(iv) eksyj pkydrk dh bdkbZ gS % 1

(A) ohm −1 m 2 mol −1

(B) ohm m 2 mol −1

(C) ohm −1 m 2 mol

(D) ohm −2 m 2 mol −1
The units of molor conductivity are :

(A) ohm −1 m 2 mol −1

(B) ohm m 2 mol −1

(C) ohm −1 m 2 mol

3629/(Set : B)

(5) 3629/(Set : B)
−2 2 −1
(D) ohm m mol

(v) fuEufyf[kr esa ls f}{kkjdh; vEy dkSu-lk gS \ 1

(A) H 3PO 4 (B) H 3PO3

(C) H 3PO2 (D) HClO 4

In the following which is dibasic acid ?

(A) H 3PO 4 (B) H 3PO3

(C) H 3PO2 (D) HClO 4

(vi) fuEufyf[kr esa izcyre vEy dkSu gS \ 1

(A) CH 3CH 2COOH (B) CH 3COOH
(C) C 6H 5COOH (D) C 6H 5CH 2COOH
In the following strongest acid is :
(A) CH 3CH 2COOH (B) CH 3COOH

(C) C 6H 5COOH (D) C 6H 5CH 2COOH

(vii) (CH 3CH 2 )2 NCH 3 ;kSfxd dk IUPAC uke fyf[k,A 1
Write IUPAC name of the compound (CH 3CH 2 )2 NCH 3 .

(viii) fuEu ,sfYdy gSykbMksa esa lcls de DoFkukad fdldk gksxk \ 1

(A) C 2H 5F (B) C 2H 5 I

(C) C 2H 5Cl (D) C 2H 5Br

In the given Alkyl halides which one has minimum boiling point ?

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

(6) 3629/(Set : B)
(A) C 2H 5F (B) C 2H 5 I

(C) C 2H 5Cl (D) C 2H 5Br

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

C 2H 5NH 2 , C 6H 5NH 2, (C 2H 5 )2 NH vkSj C 6H 5CH 2NH 2

Write the increasing of strongest basicity of the following :

C 2H 5NH 2 , C 6H 5NH 2, (C 2H 5 )2 NH and C 6H 5CH 2NH 2

H / Ni
(x) CH 3C ≡ N 2 → P, P D;k gS \ 1

(A) CH 3CH 2NC (B) CH 3CH 2NH 2

(C) CH 3NHCH 3 (D) CH 3NH 2
H / Ni
CH 3C ≡ N 2 → P, P will be ?

(A) CH 3CH 2NC (B) CH 3CH 2NH 2

(C) CH 3NHCH 3 (D) CH 3NH 2

(xi) fuEu esa ls dkSu-lk {kkjd RNA esa gS vkSj DNA esa ugha \
1

(A) ;wjsfly (B) lkbVkslhu
(C) Xokuhu (D) Fkk;ehu
Which base is present in RNA but not in DNA ?

(A) Uracil (B) Cytosine

(C) Guanine (D) Thymine

3629/(Set : B)

(7) 3629/(Set : B)
(xii) jDr ds FkDds teus ds fy, dkSu lk foVkfeu gksrk gS \ 1

(A) foVkfeu B1 (B) foVkfeu D
(C) foVkfeu K (D) foVkfeu C
The Vitamin responsible for the coagulation of blood is :
(A) Vitamin B1 (B) Vitamin D
(C) Vitamin K (D) Vitamin C

2. czkWM LisDVªe izfrthok.kq vkS"k/k D;k gSa \ bldk ,d mnkgj.k dhft,A 2

What are broad spectrum drugs ? Give one example.

3. n -izdkj vkSj p - izdkj ds v/kZpkydksa ds vuqiz;ksx fyf[k,A 2

Give applications of n-type and p-type semiconductors.

4. fuEufyf[kr dh ifjHkk"kk nhft, %
(a) gsujh fu;e
(b) jkmYV fu;e 2

Define the following :
(a) Henry's Law
(b) Raoult's law

5. izfrpqcdRo o yksgpqEcdRo inkFkksZ dks ifjHkkf"kr dhft,A 2

Define Diamagnetic and Ferromagnetic substance.

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

(8) 3629/(Set : B)
6. la{kkj.k fdls dgrs gSa \ bldh jksdFkke ds fy, nks mik; fyf[k, A 2
What is Corrosion ? Give two methods to prevent if.

7. C;wuk-N o C;quk-S ds ,dydksa ds e/; vUrj fyf[k,A 2

Differentiate between the monomers of Buna-N and Buna-S.

8. QhukWy] ,sFksuky ls vf/kd vEyh; gS] le>kb,A 2
Phenol is more acidic than Ethanol, explain.

9. ;fn 5.6 xzke KOH, 500 feyh0 foy;u esa ?kqyk gks] rks foy;u dh eksyjrk Kkr dhft,A
2

If 5.6 gm of KOH dissolved in 500 ml of solution, then what will the
molarity of the solution.

10. fuEufyf[kr dk :ikarj dSls djsaxs \ 2
(i) izksihu → izksisu – 2 – vkWy
(ii) csfUty DyksjkbM → csfUty ,sYdksgkWy
How would you convert the following :
(i) Propene to propan–2 –Ol
(ii) Benzyl Chloride to Benzyl alcohol.

11. fuEufyf[kr milgla;kstu ;kSfxdksa ds IUPAC uke fyf[k, % 3

(i) [Co (NH 3 )5 Br ]SO4
(ii) K 3 [Fe (CN )6 ]

(iii) [
K 3 Cr (C 2O 4 )3 ]
3629/(Set : B)

(9) 3629/(Set : B)
Write IUPAC names of following coordinate compounds :

(i) [Co (NH 3 )5 Br ]SO4
(ii) K 3 [Fe (CN )6 ]

(iii) [
K 3 Cr (C 2O 4 )3 ]

12. v;Ldksa ds lkanz.k ds fy, Qsu Iyou fo/kh dh foospuk dhft,A 3

Discuss froth floatation process for the concentration of ores.

13. fuEufyf[kr ds lkFk QhukWy dh vfHkfØ;k ds fy, lehdj.k fyf[k, % 3

(i) Br2 ty

(ii) CHCl3 + NaOH

(iii) Na 2Cr2O7 + lkUnz H 2SO 4

Write the Equations for the reaction of phenol with the following :

(i) Br2 Water

(ii) CHCl3 + NaOH

(iii) Na 2Cr2O7 + Conc . H 2SO 4

14. fuEu inksa dks ifjHkkf"kr dhft, % 3

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

( 10 ) 3629/(Set : B)
(i) vfHkfØ;k dh v/kkZ;q

(ii) la?kuu vko`fÙk

(iii) lfØ;.k ÅtkZ

Define the following terms :

(i) Half life period of reaction

(ii) Condensation frequency

(iii) Activation energy

15. czkmuh xfr dh foospuk dhft,A 3

Discuss the Brownian movement.

16. fuEu dk o.kZu dhft, % 21 ×2=5
2

(i) LVhQsu vfHkfØ;k
(ii) jkstsueqaM vip;u
Describe the following :
(i) Stephen reaction
(ii) Rosenmund reduction

vFkok
OR
csUthu dks fuEufyf[kr esa ifjofrZr dhft, % 1+2+2=5
(i) cSUtSfYMgkbM
3629/(Set : B)

( 11 ) 3629/(Set : B)
(ii) Qsfuy,slhfVd vEy
(iii) esfFky csUtks,V
Convert benzene into :
(i) Benzaldehyde
(ii) Phenyl acetic acid
(iii) Methyl benzoate

17. (a) fuEu v.kqvksa dh lajpuk,¡ jsf[kr dhft, % 2 + 2 + 1 = 5
(i) XeF2

(ii) BrF3

(b) 'osr QkLQksjl vkSj yky QkLQksjl dh lajpuk dk vUrj fyf[k,A

(c) H 2O , H 2S , H 2Te o H 2Sc dks c<+rh gqbZ vEyrk vuqlkj O;ofLFkr dhft,A
(a) Draw the structures of the following :

(i) XeF2

(ii) BrF3

(b) Write the structural difference between white phosphorus and red
phosphorus.
(c) H 2O , H 2S , H 2Te and H 2Sc Arrange these in increasing their
acidic character.
vFkok
OR
fuEu ds vk/kkj ewy dkj.k fyf[k, % 2+2+1

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

( 12 ) 3629/(Set : B)
(i) PH 3 dh vis{kk NH 3 vf/kd izcy {kkj gSA

(ii) F2 dh cU/k fo;kstu ÅtkZ Cl 2 dh cU/k fo;kstu ÅtkZ ls de gksrh gSA

(iii) AsH 3 , NH 3 , PH 3 o BiH 3 dks c<+rs gq, DoFkukad ds vuqlkj O;ofLFkr dhft,A

Account for the following :
(i) NH 3 is a stronger base than PH 3 .
(ii) Bond dissociation energy of F2 is less than that of Cl 2 .
(iii) AsH 3 , NH 3 , PH 3 p and BiH 3 Arrange these in order of increasing
their boiling points.

18. ikSVsf'k;e ijesaxusV cukus dk o.kZu dhft,A vEyh; KMnO4 fuEu ds lkFk fdl izdkj
vfHkfØ;k djsxk] vk;fud lehdj.k fyf[k,A 5

(i) SO2

(ii) vkWDlSfyd vEy
(iii) FeSO 4

Describe the preparation of potassium permanganate. How does
acidified KMnO4 solution react with :
(i) SO2
(ii) Oxalic acid
(iii) FeSO 4
Write ionic equations for these reactions.
vFkok
OR

(a) bysDVªkWfud foU;kl fyf[k, % 3
2+
(i) Fe

3629/(Set : B)

( 13 ) 3629/(Set : B)
(ii) Cr
(iii) Mn 2+
(b) laØe.k /kkrq vrajkdk'kh ;kSfxd D;ksa cukrs gSa \ 2
(a) Write Electronic configurations of :
(i) Fe 2+
(ii) Cr
(iii) Mn 2+

(b) Why transition metals form interstitial compounds ?

S

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