JAC Class 12 Model Question Paper 2023 Chemistry

झारखंड बोर्ड

मॉडल पेपर

Class 12

झारखण्ड शै क्षिक अनुसंधान एवं प्रक्षशिण पररषद, रााँ ची

MODEL SET (मॉडल सेट )

CLASS-XII किा – XII

SUBJECT : CHEMISTRY क्षवषय – रसायनशास्त्र

PART-I : OBJECTIVE भाग - I : वस्तुनिष्ठ

EXAMINATION YEAR – 2023 परीिा का वषष – 2023

Time – 011.30
HourHrs समय – 01
F.M- 35 घंटे

Marks : 35 अंक : 35

General Instructions (सामान्य निर्दे श ):

1. Write your Name, Roll Code, Roll No. Registration No., Date of Exam., Sitting, Faculty and Name of
the Subject on the OMR Answer Sheet in the space Provided. Put Your Full Signature on the OMR
Answer Sheet in the space Provided.
vki viuk uke] jkSy dksM] vuqØekad] iath;u la[;k] ijh{kk dh frfFk]ikyh] foHkkx rFkk fo"k; dk uke OMR mÙkj
i=d esa nh xbZ txg ij fy[ksaA vki viuk iwjk gLrk{kj OMR mÙkj&i=d esa nh xbZ txg ij djsaA
2. There are 35 Multiple Choice Questions in all.
dqy 35 cgq&fodYih; ç’u gSaA
3. All questions are Compulsory. Each question carries 1 mark.
lHkh ç’u vfuok;Z gSaA çR;sd ç’u 1 vad dk gSA
4.Four Options are given for each question. Choose the most suitable option and indicate it by
blackening the appropriate circle [ •] in the OMR Answer Sheet given separately.Use only Blue/Black
Ball-Point Pen. The use of Pencil is not allowed.
çR;sd ç’u esa pkj fodYi fn;s x;s gSaA buesa ls lcls mi;qDr fodYi pqudj mls vyx ls fn;s gq, OMR mÙkj
i=d ij lgh xksys dks dkyk dj [ •] mÙkj dks lwfpr dhft;sA uhyk ;k dkyk ckWy&IokbaV dye dk gh ç;ksx djsaA
isafly dk ç;ksx oftZr gSA
5. Before leaving the examination hall hand over the OMR Answer sheet to the invigilator. You are
allowed to take the question paper with you.
ijh{kk Hkou NksM+us ls igys OMR mÙkj i=d oh{kd dks ykSVk nhft;sA ç’u&i= vki vius lkFk ys tk ldrs gSaA

Adhere to the instructions above very carefully otherwise your OMR Answer Sheet will be
invalid and will not be evaluated.
Åij of.kZr funsZ’kksa dk /;kuiwoZd ikyu dhft, vU;Fkk vkidk mÙkj i=d vekU; gksxk vkSj mldh tk¡p ugha
dh tk;sxhA

1. The number of atoms in a body centred cubic (bcc) unit cell of a monoatomic
elementary substance is equal to :-
vr% dsfs Unzr ?kuh; ,dd dksf"Bdk esa ijek.kqvksa dh la[;k gksrh gS : ?
(a) 1 (b) 2 (c) 3 (d) 4
2. The percentage of space occupied by spheres in a cubic close packing (ccp) in three
dimension is :
f=foe esa oxZ fufoM ladqyu esa miyC/k LFkku dk fdruk izfr'kr xksyksa }kjk ?ksjk tkrk gS ?
(a) 26% (b) 52.4% (c) 74% (d) 76%
3. Molarity of an aqueous solution containing 40g of NaOH in 2 litre of solution is -
40g NaOH, 2 yhVj tyh; foy;u esa mifLFkr gS] foy;u dh eksyjrk gksxh %
(a) 0.5 (b) 1.0 (c) 1.5 (d) 0.75
4. EMF of a cell with Nickel and Copper electrode will be :
Given : EoNi2+/Ni = - 0.25V, EoCu2+/Cu = + 0.34 V
fudsy rFkk dkWij bysDVªksM okys lsy dk E.M.F. fudkysa@fn;k gS &
EoNi2+/Ni = - 0.25V, EoCu2+/Cu = + 0.34 V
(a) 0.59 V (b) 0.09V (c) - 0.59V (d) - 0.09V
5. Catalyst used in Haber's Process is -
gscj fof/k esa iz;qDr mRizsjd gS &
(a) Fe (b) Ni (c) V2O5 (d) Cr
6. Which of the following is ore of iron (Fe) :-
(a) Haematite (b) Cassiterite (c) Dolomite (d) Bauxite
buesa ls yksgk (Fe) dk v;Ld gS %&
¼a½ gsesVkbV ¼b½ dslhVsjkbV ¼c½ MksyksekbV ¼d½ ckDlkbV
7. The role of a catalyst is to change :
(a) Gibbs energy (b) enthalpy
(c) activation energy (d) equilibrium constant
mRizsjd ds dkj.k D;k cny tkrk gS ?
¼a½ fxCl ÅtkZ ¼b½ buFkSYih ¼c½ lfØ;.k ÅtkZ ¼d½ lary q u fu;rkad
8. Which of the following is independent of temperature ?
(a) Molarity (b) Molality (c) Normality (d) Formality
fuEufyf[kr esa ls dkSu rki ij fuHkZj ugha djrk gS \
¼a½ eksyjrk ¼b½ eksyyrk ¼c½ ukeZyrk ¼d½ QkWeZyrk
9. The molar conductivity of an electrolyte increases as -
(a) dilution increases (b) temperature decreases
(c) dilution decreases (d) none of above
oS|rq &vi?kV~; foy;u dh eksyj pkydrk esa o`f) gksrh gS tc %&
¼a½ ruqrk eas o`f) gksrh gS ¼b½ rkieku esa deh gksrh gS
¼c½ ruqrk esa deh gksrh gS ¼d½ mijksDr dksbZ Hkh ugha
10. What is the covalence of nitrogen in N2O5 ?
N2O5 esa ukbVªkstu dk lgla;kstdrk D;k gS \
¼a½ 1 ¼b½ 2 ¼c½ 3 ¼d½ 4
11. Which of the following ion will form coloured compounds ?
fuEufyf[kr esa ls dkSu lk vk;u jaxhu ;kSfxd cukrk gS \
(a) Sc3+ (b) Mn2+ (c) Zn2+ (d) Ti4+
12. The spin only magnetic moment of M2+ ion (Z = 27) is :
M2+ vk;u ¼Z = 27½ dk pqacdh; vk?kw.kZ gS :
(a) 8.37 BM (b) 3.87 BM (c) 6.92 BM (d) 1.44 BM
13. Identify the oxoacid in which ‘P’ exist in +5 state :

$5 vkWDlhdj.k voLFkk okys QkWLQksjl ds vkWDlhvEy dks igpkusa :
(a) H3PO3 (b) H3PO2 (c) H3PO4 (d) H4P2O6

14. The process of heating the ore in the excess supply of air below its melting point is called :
(a) Calcination (b) Roasting (c) Reduction (d) Smelting
ok;q dh vf/kdrk esa v;Ld dks xyukad ds uhps xeZ djus dh izfØ;k dks dgrs gSa :
¼a½ fuLrkiu ¼b½ HktZu ¼c½ vip;u ¼d½ izxyu
15. Which of the following ligands form chelate ?
(a) Acetate (b) Oxalate (c) Cyanide(d) Ammonia
fuEufyf[kr esa dkSu&lk fyxsM
a ,d fpysV cukrk gS \
¼a½ ,lhVsV ¼b½ vkWXtysV ¼c½ lk;ukbM ¼d½ veksfu;k
16. The number of halide ions in [Pt(NH3)3Cl2Br]Cl will be :
[Pt(NH3)3Cl2Br]Cl में है लाइड आयन की सं ख्या होगी :
(a) 4 (b) 6 (c) 2 (d) 1

dry ether
17. 2CH3Br + 2Na ---------------- > CH3 - CH3 + 2 NaBr
The reaction is :

(a) Friedel craft reaction (b) Wurtz reaction
(c) Fittig reaction (d) Wurtz Fittig reaction

2CH3Br + 2Na ---------------- > CH3 - CH3 + 2 NaBr यह अक्षभक्षिया है :

¼a½ ÝhMsy Øk¶V vfHkfØ;k ¼b½ oqV~t
Z vfHkfØ;k
¼c½ fQfV~Vx vfHkfØ;k ¼d½ oqVZt
~ fQfV~Vx vfHkfØ;k

18. CH3-CH2-Br + KOH (alc) ------> A. Here `A' is
;gk¡ 'A' gS %
(a) CH2 = CH2 (b) CH3-CH2-OH (c) CH2 = CH-Br (d) CH3-CH3

19. Butan - 2 - ol is a :
(a) 1o alcohol (b) 2o alcohol (c) 3o alcohol (d) dihydric alcohol
C;wVsu&2 & vkWy gS %&
¼a½ 10 एल्कोहल ¼b½ 20 एल्कोहल
¼c½ 30 एल्कोहल ¼d½ क्षिहाइक्षडिक एल्कोहल

H2SO4
20. C2H5-OH ---------------- > ‘A’. Here 'A' is :
443K
;gk¡ ‘A’ gS %&
(a) CH2 = CH2 (b) C2H6 (c) CH3CHO (d) C2H2

LiAlH4
21. CH3CHO + 2H ---------------- > 'A', Here 'A' is :
;gk¡ ‘A’ gS %&
(a) CH3 CH2OH (b) CH3OH (c) C2H6 (d) CH4

22. Which of the following is not a method of refining of metals ?
(a) Electrolysis (b) Smelting (c) Poling (d) Liquation
buesa ls dkSu /kkrq dk ifj'kks/ku djus dh fof/k ugha gS \

¼a½ fo|qr viVu ¼b½ izxyu ¼c½ iksfyax ¼d½ nzohdj.k

23. Radioactive disintegration is an example of -
(a) Zero order reaction (b) First order reaction
(c) Second order reaction (d) Third order reaction
jsfM;ks/kehZ fo?kVu ,d mnkgj.k gS %&
¼a½ 'kwU; dksfV vfHkfØ;k dk ¼b½ izFke dksfV vfHkfØ;k dk
¼c½ f}rh; dksfV vfHkfØ;k dk ¼d½ r`rh; dksfV vfHkfØ;k dk

24. Which one of the following is diamagnetic in nature ?
buesa ls dkSu izfrpqacdh; izd`fr dk gS \
(a) Co2+ (b) Ni2+ (c) Cu2+ (d) Zn2+

25. Transition elements are :-
(a) s-block elements (b) p-block elements
(c) d-block elements (d) f-block elements
laØe.k rRo gS %&
¼a½ s- CykWd rRo ¼b½ p - CykWd rRo
¼c½ d-CykWd rRo ¼d½ f- CykWd rRo

26. CH3 - CH2 - I + KCN (alc.) ------------> ' A'. Here 'A' is
;gk¡ 'A' gS %
(a) CH3 - CH2 -NC (b) CH3-CH2-CN (c) CH3 - CN (d) CH3-NC

27. Hydration of propene in the presence of dil. H2SO4 gives :
ruq H2SO4 dh mifLFkfr esa izkis hu dk gkbZMª's ku ¼ty;kstu½ djus ij izkIr gksrk gS %
(a) CH3 - CH2 - CH2 -OH (b) CH3 - CH(OH)- CH3
(c) CH3 - CH2 -OH (d) CH3-OH

NaOH (Conc.)
28. 2C5H5CHO -------------------------- > C6H5COONa + C6H5CH2OH

This reaction is :

(a) Kolbe's reaction (b) Clemmensen’s reduction

(c) Friedel - Craft reaction (d) Cannizzaro reaction


2C6H5CHO + Conc. NaOH ----------------------- > C6H5COONa + C6H5CH2OH

;g vfHkfØ;k gS %
¼a½ dksYc vfHkfØ;k ¼b½ DysesUlu vip;u
¼c½ ÝhMsy&Øk¶V vfHkfØ;k ¼d½ dSuhtkjks vfHkfØ;k

29. Hybridisation of nitrogen atom in CH3NH2 is :
CH3NH2 esa ukbVªkstu ijek.kq dk ladj.k gS \

(a) Sp (b) SP2 (c) SP3 (d) Sp3d

30. 10 Acid amide may be converted into amine by :

(a) Hoffmann bromamide reaction (b) Claisen reaction
(c) Perkin reaction (d) Sandmeyer reaction

10 ,flM ,ekbM dks fdl vfHkfØ;k }kjk ,ehu esa cnyk tk ldrk gS ?
¼a½ gkWQeSu ब्रोमामाईड ¼b½ Dystsu
¼c½ ifdZu ¼d½ lsaMes;j

31. The gas evolved when methylamine reacts with nitrous acid is :-
ukbVªl vEy ds lkFk feFkkby ,ehu ds vfHkfØ;k djus ij dkSu&lh xSl fudyrh gS \

(a) NH3 (b) N2 (c) H2 (d) C2H6

32. What are the hydrolysis products of sucrose ?

(a) Fructose + Fructose (b) Glucose + Glucose
(c) Glucose + Galactose (d) Glucose + Fructose

lqØkst ds tyh; vi?kVu ls D;k mRikn curs gSa \
¼a½ ÝDVkst $ ÝDVkst ¼b½ Xywdkst $ Xywdkst
¼c½ Xywdkst $ xSysDVkst ¼d½ Xywdkst $ ÝDVkst

33. Carbohydrates are stored in human body as :
(a) Starch (b) Glycogen (c) Cellulose (d) Amylose

ekuo 'kjhj esa dkcksagZ kbMªsV fdl :i esa tek jgrk gS \
¼a½ LVkpZ ¼b½ Xykbdkstsu ¼c½ lsyqykst ¼d½ ,ekbykst

34. A drug which is effective in curing malaria is :
(a) Aspirin (b) Quinine (c) Morphine (d) Analgin

,d nok tks eysfj;k ds bykt esa vljnkj gS :
¼a½ ,Lihfju ¼b½ Dohukbu ¼c½ eksQhZu ¼d½ ,ukythu

35. Bakelite is an example of :-
(a) elastomer (b) fibre (c) thermoplastic (d) thermosetting plastic

csdsykbV ,d mnkgj.k gS %
¼a½ bykLVksej ¼b½ Qkbcj ¼c½ FkeksIZ ykfLVd ¼d½ Fkeksl
Z asfVax IykfLVd

झारखण्ड शै क्षिक अनुसंधान एवं प्रक्षशिण पररषद, रााँ ची

MODEL SET (मॉडल सेट )

CLASS-XII किा – XII

SUBJECT : CHEMISTRY क्षवषय – रसायनशास्त्र

PART-II : SUBJECTIVE भाग - II : विषयविष्ठ

EXAMINATION YEAR – 2023 परीिा का वषष – 2023

Time – 02 Hour
1.30 Hrs समयF.M-35
– 02 घंटे

Marks : 35 अंक : 35

General Instructions (सामान्य विर्दे श ):

1. Candidates should answer in their own language style as far as possible.
परीिार्थी यर्थासं भव अपनी भाषा- शैली में उत्तर दें ।

2. This question paper has three sections. For example- A,B,C. From all sections answer
according to instructions.
इस प्रश्न पत्र के तीन खंड हैं । यर्था : क,ख,ग,। सभी खंड से क्षनदे शानुसार प्रश्ननं के उत्तर दें ।

3. The total number of questions in section ‘A’ is 07. Answer any 05 of them. Each question
from this section is of 01 mark.
खंड ‘क’ में प्रश्ननं की कुल संख्या 07 है (प्रश्न 01 से 07)। इनमें से क्षकन्ीं 05 प्रश्ननं के दें । इस खंड से प्रत्येक प्रश्न 01 अंक
का है ।

4. The total number of questions in section ‘B’ is 07. Answer any 05 of them. Each question
from this section is of 03 marks.
खंड ‘ख’ में प्रश्ननं की कुल सं ख्या 07 है (प्रश्न 08 से 14)। इनमें से क्षकन्ीं 05 प्रश्ननं के उत्तर दें । इस खंड से प्रत्येक प्रश्न
03 अंक का है ।

5. The total number of questions in section ‘C’ is 05. Answer any 03 of them. Each question
from this section is of 05 marks.
खंड ‘ग’ में प्रश्ननं की कुल सं ख्या 05 है (प्रश्न 14 से 19)। इनमें से क्षकन्ीं 03 प्रश्ननं केउत्तर दें । इस खंड से प्रत्येक प्रश्न 05
अंक का है ।

1. Give an example of aerosol ?

,d ,jkslksy dk mnkgj.k nsa %

2. What is metallurgy ?

/kkrqdeZ D;k gS \

3. Among hydrides of group 15 elements which has lowest boiling point?

वगष 15 के तत्नं के हाइडराइड् स में क्षकसका क्वर्थनां क न्यूनतम हनता है \

4. How many unpaired electrons are prsent in Mn2+ ion ?

Mn2+ esa fdrus अयु ग्मित bysDVªkWu ekStwn हैं \

5. What type of hybridisation is involved in the geometry of ‘square planar’ ?

^^oxZ leryh;** T;kfefr esa fdl izdkj dk ladj.k ik;k tkrk gS \

6. Write the IUPAC name of :

CH3 OH

| |

CH3 CH CH CH2 CHO

CH3 OH

| |

CH3 CH CH - CH2 - CHO dk IUPAC uke crk,¡ %

7. Write name of a disease caused by deficiency of vitamin ‘D’.

क्षवटाक्षमन ‘D’ की कमी से हनने वाली एक बीमारी का नाम क्षलखें ।

8. What is order of reaction ? What is the unit of first order reaction ?

vfHkfØ;k dh dksfV D;k gS \ izFke dksfV vfHkfØ;k dk ek=d D;k gS \

9. Write difference between Physisorption and Chemisorption.

HkkSfrd vf/k'kks"k.k ,oa jlk;fud vf/k'kks"k.k esa varj fy[ksAa

10. Complete these reactions ¼vfHkfØ;kvksa dks iwjk djsa½

Peroxide

(a) CH3 - CH2 - CH = CH2 + HBr ----------------->

(b) CH3 - CH2 - Br + Ag CN ----------------- >

11. Complete these reactions :

vfHkfØ;kvksa dks iwjk djsa :

(a) CH3 - CH2 - OH + PCl3 ---------

12. Write three differences between DNA and RNA.

DNA एवं RNA में तीन अंतर क्षलखें ।

13. Distinguish between homopolymer and Copolymer. Give one example of each.

gkseksikWfyej vkSj dksikWfyej esa varj fy[ksa rFkk izR;sd ds ,d&,d mnkgj.k nsAa

14. (a) What are tranquilizers ? Write one example.

iz'kkard D;k gS \ ,d mnkgj.k fy[ksAa

(b) What are Analgesics? Write one example.

पीड़ाहारी क्या हैं ? एक उदाहरण क्षलखें ।

15. Write short notes on -

(a) Diamagnetism (b) Paramagnetism (c) Ferromagnetism

laf{kIr fVIi.kh fy[ksa %

(a) izfrpqEcdRo (b) vuqpqca dRo (c) ykSgpqacdRo

16. (a) Write Faraday's law of electrolysis .

fo|qr vi?kVu ds fy, QSjkMs ds fu;e fy[ksaA

(b) 2 ampere electric current is passed through aqueous solution of copper

chloride (CuCl2) for 30 minutes. What amount of copper (Cu) will deposit

at cathode ?

2 ,sfEi;j dh fo|qr /kkjk dkWij DyksjkbM (CuCl2) ds foy;u esa 30 feuV rd izokfgr djus ij fdrus ek=k esa

dkWij (Cu) bysDVªksM ij fu{ksfir gksxk \

17. Draw the structure of the following compounds :

fuEufyf[kr यौक्षगकनं dh lajpuk cuk,¡ %&

(a) H3PO4 (b) H3PO3 (c) PCl5

(d) XeO3 (e) XeOF4

18. (a) What is mole fraction ?

eksy izHkkt D;k gS \

(b) What is the mole fraction of glucose in 10% (w/w) glucose solution ?

10% (w/w) Xywdkst foy;u esa Xywdkst dk eksy izHkkt D;k gksxk \s

19. Identify P,Q, R, S and T in the following reactions :

fuEufyf[kr vfHkfØ;kvksa esa P, Q, R, S ,oa T dks igpkusa %

SOCl2 H2
(a) CH3COOH -----------> P -------------------> Q
Pd - BaSO4

(i) Cl2 / Red P
(b) CH3CH2COOH -------------------> R
(ii) H2O

O
|| Zn-Hg
(c) CH3- C - CH3 --------------- > S
HCl

(d) CH3CHO + HCN -------------------- > T