MH 12th Question Paper June 2026 Chemistry

FOR MAHARASHTRA BOARD (MSBSHSE) CLASS 12 EXAM PREPARATION

Maharashtra Board
(MSBSHSE) Class 12
2026
June Session Question
Paper · Chemistry
EXAM YEAR

Maharashtra Board (MSBSHSE) Class 12 2026
TYPE SUBJECT

June Session Question Paper Chemistry

Notes · Sample Papers · Previous Year Papers · Mock Tests

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Page N o. 1/ 7 Subject Code J-261 a

Page N o. 1/ 7 Subject Code J-261 Seat N o.

D AT E : 22/ 06/ 2026 E
SUBJECT : CH EM I ST RY (55)
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T ime : 11.00 - 2.00

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D URAT I ON : 3 H our s
e m T OT AL PAGES : 7
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T OT AL M ARKS : 70
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Gener al I nst rluct ions : ag
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T he quest ion paper is divided int o four sect ions.

(i ) Sect ion A : Q. N o. 1 cont ains T en mult iple choice t ype of quest ions car r ying
One m ar k each. Only t he fi r st at t empt wi ll be consider ed for
evaluat ion.
Q. N o. 2 cont ai ns Ei ght ver y shor t answer t ype of quest i ons
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car r ying One mar k each.

(ii )
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Sect ion B : Q. N o. 3 t o Q. N o. 14 ar e T welve shor t answer t ype of quest ions

g la each. (At t empt any Eight )
car r ying T wo mar ks

(ii i )
a
Sect ion C : Q. N o. 15 t o Q. N o. 26 ar e T welve shor t answer t ype of quest ions
car r ying T hr ee mar ks each. (At t empt any Eight )

(i v) Sect ion D : Q. N o. 27 t o Q. N o. 31 ar e F ive long answer t ype of quest ions
car r ying F our mar ks each. (At t empt any T hr ee)

(v) Use of log t able is allowed. Use of calculat or is not allowed.
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(vi )
c o m F igur es t o t he r ight indicat e full mar ks.
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Physical Const ant s : ( 1) Avogadr o’s N umber = N A = 6.022
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(vi i)

s g–l atm K – 1 mol – 1 /
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( 2) Gas const ant R = 0.08206 L

ag 8.314 JK – 1. mol – 1

( 3) 1 Far aday = (F) = 96500 Coulombs

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Page N o. 2/ 7 Subject Code J-261
SECTI ON - A
Q. 1. Select and wr i te the cor r ect answer s for the followi ng multi ple 10
choi ce type of questi ons :

(i) Which of t he following is NOT an elast omer ?
(a) vulcanized r ubber (b) buna-S
(c) neopr ene (d) polyet hene

(ii) Anisole r eact s wit h H I at 398K t o for m –
(a) cyclohexanol (b) benzenol
(c) iodobenzene (d) benzene

(iii) Unit of H enr y’s const ant is _____.
(a) mol L –1 bar –1 (b) mol L bar
(c) mol L –1 bar (d) mol –1 L –1 bar –1

(iv) The shape of br omine pent a-fluor ide is _____.
(a) L inear (b) Bent - T - Shape
(c) Tet r ahedr al (d) Squar e pyr amidal

(v) The r elat ion bet ween edge lengt h and r adius for body cent er ed
cubic st r uct ur e is –
a a
(a) r (b) r 3
2 4
a a
(c) r 2 (d) r 3
4 2

(vi) At omic number of post act inoid element r ange fr om–
(a) 58 – 72 (b) 78 – 92
(c) 93 – 103 (d) 104 – 118

(vii) The pH of buffer solut ion cont aining 0.05 mol NaF per lit r e and
0.01 mol H F per lit r e (pK a = 3.1427) is ____.
(a) 3.8417 (b) 3.1427
(c) 0.3841 (d) 0.0384

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(viii) Pr epar at ion of et hanamine fr om acet onit r ile r epr esent s –
(a) Gabr iel pht halimide synthesis
(b) M endius r educt ion

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(c) H ofmann hypobr omit e degr adat ion
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(d) Sandmeyer r eact ion
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s emsour ce of dichlor ocar bene is _____. l a
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(ix) The

g la (a) met hyl chlor ide
a (b) met hylene chlor ide
(c) chlor ofor m
(d) car bon t et r achlor ide

(x) The r eagent used t o conver t acet yl chlor ide t o acet aldehyde is –
(a) SnCl 2 + H Cl
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(b) Zn· H g + Conc.H Cl
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CH 2 OH
NH 2 NH 2 K OH / |
(c)
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CH 2 OH

(d) H 2 /Pd BaSO4

Q. 2. Answer the followi ng questi ons : 8

(i) Wr it e t he r elat ion bet ween conduct ivit y and molar conduct ivit y.

(ii) Wr it e t he oxidat ion st at e of Nickel in [Ni (Cl )4 ]2 complex ion.
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es .of car t o
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s e
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a (iv) Wr it e t he glycosidic linkage pr esent in malt ose.

(v) Dr aw t he st r uct ur e of per chlor ic acid.

(vi) Wr it e t he t r ade name of most common t her moplast ic polyest er.

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Page N o. 4/ 7 Subject Code J-261
(vii) Calculat e change over t emper at ur e for a cer t ain r eact ion, whose
H ° is – 60kJ and S° is –150 JK –1.

(viii) Wr it e t he unit of r at e const ant of zer o or der r eact ion.

SECTI ON - B

Attempt any EI GH T of the followi ng questi ons : 16

Q. 3. Wr it e r eact ions involved dur ing pr epar at ion of Nylon 6, 6 fibr e.

Q. 4. Derive Ost wald’s dilut ion law equat ion for a weak acid.

Q. 5. Dr aw t he st r uct ur es of t wo for ms of alanine having pH  2 and pH  10 .

Q. 6. Define t he following t erms :

(a) I nt ensive pr oper t y

(b) St andar d ent halpy of combust ion

Q. 7. What is t he act ion of following r eagent s on et hyl amine?

(I ndicat e by r eact ion)

(a) Nitr ous acid

(b) Chlor oform and K OH

Q. 8. (a) St at e K ohlr ausch law of independent migr at ion of ions.

(b) Wr it e Ner nst equat ion t o calculat e elect r ode pot ent ial.

Q. 9. (a) Wr it e gener al elect r onic configur at ion of 3d ser ies element s.
(b) Wr it e any t wo point s which explain about t he colour of a t r ansit ion
met al ion.

Q. 10. Explain aldol condensat ion r eact ion wit h r espect t o et hanal.

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Q. 11. Wr it e a not e on K olbe r eact ion.

Q. 12. (a) Wr it e t he r elat ion bet ween st andar d cell pot ent ial and equilibr ium
const ant .
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(b) Wr it e t he r epr esent at ion of sodium hexacyanofer r at e (I I I ) complex.
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m r eact ion 60% of r eact ant decomposes in 40 min. Calculat e las
I n fir st oreder
Q. 13.
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t he r latae const ant of t he r eact ion. ag
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Q. 14. Explain opt ical act ivit y of 2-chlor obut ane.

SECTI ON - C
Attempt any EI GH T of the followi ng questi ons : 24
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Q. 15. (a)
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Der ive a r elat ionship bet ween molar mass, densit y of t he subst ance
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s
and unit cell edge lengt h. e
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(b) Define - par amagnet ic solids.
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Q. 16. (a) M ent ion t he names of four pr inciples of gr een chemist r y.
(b) Wr it e advant ages of nanopar t icles and nanot echnology in t he field
of ener gy sect or.

Q. 17. (a) St at e second law of t her modynamics.
(b) Define - Nucleot ides.
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c. o (c) Wr it e chemical react ion for conversion of benzene diazonium
s e mchloride

e m int o benzene.
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–3
y pr oduct of AgBr is 5.2×10–13. Calculat e it s solubilit y in
–3
mol dm and g dm .

(M olar mass of AgBr = 187.8 g mol –1)

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Page N o. 6/ 7 Subject Code J-261
Q. 19. Conver t t he following :

(a) Et hanol t o et hoxyet hane.
(b) Phenol t o p-benzoquinone
(c) Salicylic acid t o aspir in

Q. 20. (a) St at e Raoult ’s law.
(b) Der ive the relat ionship to determine molar mass of non volatile solute
by depr ession of fr eezing point .

Q. 21. (a) Explain t he for mat ion of [CoF6 ]3 complex ion wit h r espect t o
(i) Oxidat ion St at e of Cobalt
(ii) Type of hybr idisat ion
(iii) M agnet ic pr oper t y
(iv) Geomet r ical shape
(b) Wr it e t he name of ligand used t o est imat e har dness of wat er.

Q. 22. (a) Writ e cell reactions of hydrogen-oxygen fuel cell at anode and cathode.
(b) Wr it e an applicat ion of elect r ochemical ser ies.

Q. 23. (a) Explain anomalous behaviour of oxygen wit h r espect t o
(i) At omi cit y
(ii) M agnet ic pr oper t y
(iii) Oxidat ion st at e
(iv) Nat ur e of hydr ide
(b) Wr it e any t wo uses of helium.

Q. 24. What is the ener gy of act ivat ion of a r eaction whose rat e const ant doubles
when t he t emper at ur e changes fr om 303 K t o 313 K ?

Q. 25. (a) Wr it e chemical r eact ions t aking place dur ing ext r act ion of ir on in
zone of r educt ion of t he blast fur nace.
(b) Wr it e obser ved elect r onic configur at ion of gadolinium. (Z=64)

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Q. 26. Conver t t he following :

(a) Acet ic acid t o et hyl alcohol
(b) Acet ic acid t o acet ic anhydr ide
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(c) Acet yl chlor ide t o acet amide
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a SECTI ON - D
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ag any T H REE of the followi ng questi ons :
Attempt 12

Q. 27. (a) Define : (i) Co-or dination number s

(ii) Ambident at e ligand
(b) Wr it e a not e on Clemmensen r educt ion of pr opanone.

Q. 28. (a)
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Der ive r elat ionship bet ween H and U for a gaseous chemi cal
r eact ion.
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(b)
s e
Give r eason – Ozone is a good bleaching agent .
(c) Wr it e any t wo uses of SO2l.a
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Q. 29. (a) Define - Polymorphism.
(b) St at e and explain H ess’s law of const ant summat ion. Wr it e it s one
applicat ion.

Q. 30. (a) 0.01 m aqueous for mic acid solut ion fr eezes at – 0.021°C. Calculat e
it s degr ee of dissociat ion. (K f = 1.86 K. kg.mol –1)
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(a) What is t he act ion of following r eagent s on Br omoet hane?
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g la (i) KNO2 a
a (ii) ‘Mg’ metal
(iii) Silver acet at e
(b) Dr aw str uct ur e - DDT insect icide.



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