MP Board Class 12 Question Paper 2020 for Chemistry

E-822 Roll No. -

Higher Secondary Examination (Regular) - 2020

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CHEMISTRY
(Hindi & English Versions)

Total Total Printed Time : Maximum
Questions : 18 Pages : 8 3 Hours Marks : 70

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iv)

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Instructions :
(i) All questions are compulsory.
(ii) Question Nos. 1 to 4 are objective type questions carry total 20 marks.
(iii) Question Nos. 5 to 7, each question carries 2 marks. (word limit 30 words)
(iv) Question Nos. 8 to 10, each question carries 3 marks. (word limit 75 words)
(v) Question Nos. 11 to 15, each question carries 4 marks. (word limit 120 words)
(vi) Question Nos. 16 to. 18, each question carries 5 marks. (word limit 150 words)
(vii) Internal choice is given in every question from Question Nos. 5 to 18.

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lx5=5
(T) f \3qMtul t —
(a) 41(1 (b) *Fitz
(c) 19c6 (d)
(A-) aTt aTrawff 9-47Th--r 31ftfitTFT K = 5.5 x10-14 s-1 A" I
(a) 1.26 x 1013 s (b) 0
(c) 1.16 x 1010 s (d) 1.91 x 106 s
,3416(1.11 t —
(a) (b)
(c) tit (d)
(() aizRzH
(a) Al (b) Cu
(c) Fe cbi (d) Zn cbt
(. K4 [Fe (CN)6] -44 3irEiT9- fur i trt —
(r.) 3 (b) 2
(c) 8 (d) 5
Choose correct options
(A) Example of Hexagonal crystal is -
(a) Diamond (b) Graphite
(c) Salt (d) Water
(B) Half life period for first order reaction if K = 5.5 x 10-14
(a) 1.26 x 1013 s (b) 0
(c) 1.16 x 1010 s (d) 1.91 x 106 s
(C) Example of Payas (Emulsion) is -
(a) Butter (b) Soil
(c) Rubber (d) Cloud
(D) Bauxite is the ore of -
(a) Al (b) Cu
(c) Fe (d) Zn
(E) Oxidation state of Iron in K4 [Fe (CN)6] is
(a) 3 (b) 2
(c) 8 (d) 5

220 / E-822 P.T.O.

cto c61 fif'Air
- 1x5.5
er-4-o-r kdi iii Ltiqi Am! t
4-Twk). %i
f4A149- t I
fitrefa. alai t I
) 6frettb-Rcbrt- eTir 4 init{nl o 31-t4#W7r1 3f17 T)4t t i
ill in the blanks :
Vitamin is found in Amla.
Mercury is a metal.
Neoprene is a rubber.
Coagulation is the just reverse of
Oxidation state of phosphorous in orthophosphoric acid
is

11,3T1t tfAlt

A) erai (i) ZnS
) tEr (ii) NaC1
C) (iii) 02
D) Aug (iv) Cu20
E) wrtz (v) AgC1
atch the pairs :
,,A,, “Bit

A) Schottky defect (i) ZnS
B) Frankel defect (ii) NaC1
C) Paramagnetism (iii) 02
D) Zinc blende (iv) Cu20
E) Cuprite (v) AgC1

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4 (-IN / 3R=P:i Wit17 : 1x5=5

(el) TI7 16 t ciccI %Ml\ t
(() c•i) %01,4 troTruj \VI') 'crlY.31,-1
(51-11c11 t I

(r) 709- Acri fir r9 61 I CO
7f4-4t9* 3-1-1 1 itTIT C tsI -1c-I I t
VA-9. t I 4Z:11

Write True or False CN
(a) Group 16. elements are called halogens. CO
(b) One halogen atom combined with another halogen and form
Inter-halogen compound.
(c) Ethyl amine is soluble in water while aniline is not.
C\I
(d) Formation of terylene is by reaction between Ethylene Glycol agi
Terphthalic acid.
CN
(e) Starch is an artificial polymer. CN
CO

5 (etW) cb) ti4-i*-11

# 8 2204 268
Explain mole fraction.
WRI / OR

critc11 tritilTRff 1-Wf I
Define Molarity.

6 ft-tr" . 5111Tq ,Ert 601 t
What is Tyndall effect ?
3TerdT / OR

ctwii trItil-ftru *rf4'44
Define Peptization.

220 / E-822

4;1' : 2
4rircr
) .its,A1
xplain following :
) Ligand
CO
Coordination number.
zTenis4 OR
Rtriir4: arrzr9-9- wilcigesp et) -41-P.-44
ive one example of ionization 114merism in coordination compounds.

aT9Mi "F4-0719. if 31-27 li-Wr
ive three differences between iTeal and non-ideal solutions.
OR
\ylci zfici(FIN = 18) I
ind molality 'of pure water (H2151 = 18).

9 fay cf.;) 3
(a) chicho4-ill CO
(b) Taiii-T -zrr I
Explain following : 00
(a) Carbylamine reaction.
(b) Hoffman bromide reaction. (N
rzti
zili4CY OR
alai t : 07c1(1 Wi)(1)(ul
7f0-1.0. 9-rraT f fo:ze cf)(01 t
- rfk41-ff, Trrar9- -gliff9-% itzrr cbwi t
14rocrt-Pct) eTif t 'WM 278 K -117 fs
cb(oi t
What happens when : (write equ4ions only)
) Ethyl amine react with Nits acid.
(ii) Aniline reacts with bromineNvater in aqueous medium.
(iii) Aniline reacts with sodium gitrite and hydrochloric acid at 278 K.

/ E-822 5 1 1111111 HE 1311111 1111 11H11111 11111 11111111 P.T.O.

10 di -I A, C, D tAld r cbtil tr (-)fl fAN-4
Write sources and deficiency diseases from vitamin A, C and D.
apt / OR
.T-1.7. 4 -1 ai--d-T trtir
Give three differences between RNA and DNA.

11 # ctql arpi-E( ?f (-1 14) velizr 4-ft ai-kfttn.
aTd&rp-r-o- I ci IITTfret '16I <41 td1 t I
What is meant by Half life ? Prove that half life period of first order
reaction does not depend on its initial concentration.
zwqr / OR
-5r44 4te TP41-4-zrr -itTft - 'ri'"
Air
Derive expression for rate constant of First order reaction.

12 itrIt44-1 u tai 1 c61 3to#M--Tur itzit f I (ct) qrz) 4
Write oxidation reactions of potassium permanganate. (any four)
ailmT / OR
A-4-1-qrt N-e.-11 -c41 ltN-4
Give four differences between Lanthanides and Actinides.

13 Pi 4-1 trT Taii?r etcruitf : 4
(i) s13-TT9- (ii) tr.t.tr.
Write short notes on following :
(i) Freon (ii) D.D.T.
31-4-4-r / OR
(i) ctcril t-W4 t-TNi-d- cur -k# std ?
(ii) CHC13 r CHI3 I.U.P.A.C. 9-r4 fffd-
(i) How chloroform is stored for safe storage ?
(ii) Write I.U.P.A.C. name of CHC13 and CHI3.

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1 (b)
0 31-liazire
(a) Tqii-T —
31-fitPzi
Explain following reactions :
(a) 'Remer-Timman reaction
(b) Kolbe reaction.
aTtPT / OR
1:a9tM. iWtrq I
rite four differences between alcohol and phenol.

cb) : 4
zip \3TiiiiSIT
q)lti
)
xplain following reactions :
) Etards reactions
) Gatterman - Koch reaction
Aldol condensation.
31'21-4T / OR
cb) I

) c) (Aclq ul 404-Tur fo1t4 .
) Explain Canizzaro reaction.
Write silver mirror test for identification of Aldehyde.

16 wiwr Tr fkzrff 1-9-zN wr #49- 4 coilti A-- 4I
3-T- 5
Explain Kolharasch law, Write in brief two applications of this law.
/ OR
TivrTur c yRITTfti-ff 'rWr t;ci TtkliCuT tr tsmici aUiq Nit#1-
) efrkp-r9 31-9-OpT9- tkiv_Act,
Define corrosion. Write two preventions from corrosion.
Write chemical equations for charging and discharging of
Lead storage cell.

111 11111111 11111111111 11111 1111 I II III 111111111111111111
P.T.o.
1

17 t-
17 wr quiff 14-.1 f4f 2+2+1=5

(i) =41 (ii) f4RT (iii) .1411,4) tu
Explain preparation of Ammonia from Habers Process under following
headings :
(i) Diagram (ii) Method descriR (iii) Equation.
3M41 / OR CO
4)1N)) t ti t 9 (rfri t t,1 foit-4
Write formulae of names and structures of ye oxy acids of phosphorous.

18 4--1 .) 3qttut C : 5
(i) miCiNct) (ii) TF1-39- 11-1T (iii)
(iv) ,ilsw (v) m aiwr k-r)
(\I
Write one example of each of following itv
(i) Antibiotic (ii) Artificial sw6aner (iii) Antiseptic
CN
(iv) Anti inflammatory (v) Antaacid. (NI
aiem / OR
(1) NM LIR(41- ZIT ftccruit fo- 11.
(2) :rus-ff •WaYT ,rio cbi4 cmi -10 ct)t ? k,c)
( 1 ) Write a short note on food preservatt
(2) Why soap does not work in Hard W2 ?

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CO
t,C)

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C
(N
Cs4
CO
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