Maharashtra 12th Std Model Question Paper Chemistry

Maharashtra State Board Sample Paper 2026

DAY — 06 SEAT NUMBER

2025 VII 01 1100 (E)
J-371
CHEMISTRY (55)

Time : 3 Hrs. ( 8 Pages ) Max. Marks : 70

General Instructions :
The question paper is divided into four sections.
(1) Section A : Q. No. 1 contains Ten multiple choice type of
questions carrying One mark each. Only the
first attempt will be considered for evaluation.
Q. No. 2 contains Eight very short answer
type of questions carrying One mark each.
(2) Section B : Q. No. 3 to Q. No. 14 are Twelve short answer
type -I questions carrying Two marks each.
(Attempt any Eight)
(3) Section C : Q. No. 15 to Q. No. 26 are Twelve short
answer type -II questions carrying Three
marks each. (Attempt any Eight)
(4) Section D : Q. No. 27 to Q. No. 31 are Five long answer
type of questions carrying Four marks each.
(Attempt any Three)
(5) Use of log table is allowed. Use of calculator is not allowed.
(6) Figures to the right indicate full marks.

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(7) Given data :
(i) R = 8.314 J K–1 mol–1
(ii) At. Wt. of Oxygen = 16
(iii) NA = 6.022 × 1023
(iv) 1F = 96500ºC

SECTION - A
Q. 1. Select and write the correct answer for the following
multiple choice type of questions : [10]

(i) Coordination number of atoms in bcc crystal lattice is
_____.
(a) 2 (b) 4
(c) 6 (d) 8

(ii) The unit of Henry’s Law constant is _____.
(a) mol L–1 bar–1
(b) mol–1 L bar–1
(c) mol L–1 bar
(d) mol–1 L–1 bar–1

(iii) pH of human blood is _____.
(a) 6.9 (b) 7.0
(c) 7.4 (d) 8.1

(iv) Ideal gas expands isothermally from 20dm3 to 25dm3
at constant pressure of 1.5 bar ; then work done in dm3
bar will be _____.
(a) –1.5 (b) –5
(c) –7.00 (d) –7.5

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(v) Correct statement about electrolysis of aqueous NaCl
is _____.
(a) H2 gas liberated at cathode
(b) Cl2 gas liberated at cathode
(c) H2 gas liberated at anode
(d) O2 gas liberated at anode

(vi) Rate constant of reaction is mole dm–3 sec–1, the order
of reaction will be _____.
(a) Zero (b) One
(c) 1.5 (d) 2

(vii) The correct possible general formula for interhalogen
compound in the following is –
(a) XX (b) XX
(c) XX (d) XX

(viii) All radioactive elements are present in which of the
following _____.
(a) 3d series (b) 4d series
(c) Actinoid series (d) Lanthanoid series

(ix) The metal used in preparation of Grignard reagent is
_____.
(a) Al (b) Mg
(c) Na (d) Fe

(x) Which among the following is dicarboxylic acid –
(a) Acetic acid
(b) Phthalic acid
(c) Caproic acid
(d) Citric acid

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Q. 2. Answer the following questions : [8]

(i) Write formula to calculate percent (%) atom economy of

particular reaction.

(ii) Write name of monomer used to form nylon-6 polymer.

(iii) Write the total number of chiral carbon atoms present

in glucose.

(iv) Complete the following reaction

O
||

(v) Write name of reagent used to convert phenol

to Benzene.

(vi) Write IUPAC name for

49
(vii) Write oxidation state of ‘Fe’ in [Fe(CN)6 ] complex ion.

(viii) When 6.0g of O2 reacts with ClF as per

The enthalpy change is 38.55 kJ. Calculate the

standard enthalpy of the reaction.

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SECTION - B

Attempt any EIGHT of the following questions : [16]

Q. 3. When gold crystallizes, it forms face-centered cubic cells. The
unit cell edge length is 4 × 10–8 cm. Calculate the density of
gold. Molar mass of gold is 197g mol–1.

Q. 4. Define the following terms :

(a) Isotonic solution
(b) Colligative properties

Q. 5. A solution has hydrogen ion concentration 0.01M. Calculate
pOH of the same solution.

Q. 6. Derive the relation between 'H and 'U for gaseous phase
reaction.

Q. 7. What is Salt bridge? Write the functions of salt bridge.

Q. 8. Distinguish between order and molecularity of a reaction.

Q. 9. Explain anomalous behaviour of Fluorine with respect to
(i) Oxyacid (ii) Nature of hydrides
(iii) Electronegativity (iv) Electron gain enthalpy

Q. 10. Balance the following chemical reactions.

(i)

(ii)

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Q. 11. Write IUPAC names of following co-ordination ion / compound.
(i) [Cu(NH3 )4 ]2
(ii) Na3[AlF6 ]

Q. 12. Complete the following reactions –

(i)

(ii)

Q. 13. Write chemical reactions for the preparation of phenol from
isopropyl benzene.

Q. 14. Write a note on Haloform reaction.

SECTION - C
Attempt any EIGHT of the following questions : [24]

Q. 15. A mixture of benzene and toluene contains 30% by mass of
toluene. At 30°C, vapour pressure of pure toluene is 36.7 mmHg
and that of pure benzene is 118.2 mmHg. Assuming that the
two liquids form ideal solution, calculate partial pressure of each
constituent in the above solution at 30°C.

Q. 16. Define :
(i) Buffer solution
(ii) Solubility product
(iii) Common ion effect

Q. 17. Calculate maximum work done when 32 g of oxygen expanded
isothermally and reversibly from pressure 2 bar to 1 bar
at 298 K.

Q. 18. What is zero order reaction? Derive integrated rate law equation
for zero order reaction.

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Q. 19. (a) Write structures of :
(i) Chlorous acid
(ii) Perchloric acid
(b) Write uses of Helium

Q. 20. (a) What is Lanthanoid contraction?
(b) Compounds of ‘d’ block elements are coloured in solid state
as well as in an aqueous state. Explain.

Q. 21. (a) Write the representation of sodium hexacyanoferrate (III)
(b) Write type of hybridization and magnetic behaviour of
the following –

(i) [Co(NH3 )6 ]3

(ii) [NiCl4 ]29

Q. 22. Convert – (Indicate by reaction)
(a) Acetic acid to ethyl acetate
(b) Acetaldehyde to acetaldoxime
(c) Acetone to propane

Q. 23. (a) What is the action of following on ethylamine –
(i) Hinsberg reagent
(ii) Nitrous acid
(b) Write increasing order of basicity for CH3NH2, (CH3)2 NH
and (CH3)3N

Q. 24. (a) What are monosaccharides?
(b) Draw Zwitter ion structure of D amino acid.
(c) Write name of components of the nucleotide monomers.

Q. 25. (a) Write chemical reaction for preparation of Teflon.
(b) Write structure of monomer of natural rubber.
(c) Give two uses of high density polyethene [HDP].

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Q. 26. Explain the following terms :
(a) Sustainable development
(b) Nanomaterial
(c) Name the gamma isomer of BHC.

SECTION - D
Attempt any THREE of the following questions : [12]

Q. 27. (a) Distinguish between crystalline and amorphous solids.
(b) Explain bleaching action of chlorine in the presence of
moisture.

Q. 28. (a) Draw neat and labelled diagram of standard hydrogen
electrode.
(b) Calculate e.m.f. of the following cell.

If and .

Q. 29. (a) State whether the following reaction is spontaneous or non
spontaneous if 'H = 50 kJ and 'S = –130JK–1 at 250K.
(b) Explain optical activity in 2-chlorobutane.
(c) Write full name of DDT.

Q. 30. (a) Define Co-ordination number.
(b) Write note on Reimer-Tieman reaction.
(c) Write structural formula for methyl vinyl ether.

Q. 31. (a) Explain Aldol condensation reaction of ethanal.
(b) Write four properties of interstitial compounds of
transition elements.
‹‹‹

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Maharashtra State Board Sample Paper 2026

DAY — 06 SEAT NUMBER

2025 VII 01 1100 (M)
J-372
CHEMISTRY (55)

Time : 3 Hrs. ( 8 Pages ) Max. Marks : 70

–
2

–
I
–
II
– 31

(i) 8.314 J K–1 mol–1
(ii) = 16
(iii) NA = 6.022 × 1023
(iv) 1F = 96500°C

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(i) bcc (co-ordination
number)
2 4
6 8

(ii)
mol L–1 bar–1 mol–1 L bar–1
mol L–1 bar mol–1 L–1 bar–1

(iii) pH
6.9 7.0
7.4 8.1

(iv) 1.5 bar 20dm3 25dm3
dm3bar
–1.5 –5
–7.0 –7.5

(v) NaCl
H2
Cl2
H2
O2

(vi) mole dm–3sec–1
(order)

1.5 2

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(vii)

XX XX
XX XX

(viii)

3d 4d

(ix)

Al Mg

Na Fe

(x)

(i) (atom economy)

(%)

(ii) 6 (monomer)

(iii) (chiral)

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(iv)

O
||

(v)

(vi) IUPAC

49
(vii) [Fe(CN)6 ] ‘Fe’

(viii) 6.0g O2, ClF

38.55 kJ

4 × 10–8 cm

197 g mol–1.

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0.01M pOH

'H 'U

(order) (molecularity)

(i) (ii)
(iii) (iv)

(i)

(ii)

.

(co-ordination) IUPAC
2
(i) [Cu(NH3 )4 ]
(ii) Na 3[AlF6 ]

(i)

(ii)

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30% 30ºC
36.7 mm Hg 118.2 mm
Hg 30ºC
(partial)

(i) (ii)

(iii)

298 k 32 g 2 bar 1 bar

(i)

(ii)

d (solid) (liquid)

(III)

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(i) [Co(NH3 )6 ]3
(ii) [NiCl4 ]29

(i) (ii)

CH3NH2 , (CH3)2NH (CH3)3N

(monosaccharides)

D (Zwitter)

(components)

(teflon)

(HDP)

(sustainable)

BHC

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emf

.

250 K 'H = 50 kJ 'S = –130JK–1

2-
DDT (long form)

(co-ordination)
(Reimer-Tieman)
(structure)

(ethanal)

‹‹‹

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