MH 12th Question Paper 2025 Chemistry

Maharashtra Board

Question Paper
2025
Download PDF

SSC | HSC
QUESTION PAPER
Presented By

DAY — 08 SEAT NUMBER

2025 II 20 1100 (E)
J-302
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.

0 3 0 2 Page 1 P.T.O

(7) Given data :
(i) R = 8.314 J/K/mol
(ii) Atomic mass Na = 23
(iii) Kf for water = 1.86 K kg mol–1
(iv) 1F = 96500C
(v) NA = 6.022 × 1023

SECTION - A

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

(i) Schottky defect is NOT observed in _____.
(a) NaCl (b) KCl
(c) AgBr (d) NiO

(ii) The freezing point of 0.1m aqueous solution of urea, if
Kf for water is 1.86 K kg mol–1 is _____.
(a) 1.86 ºC (b) –1.86 ºC
(c) 0.186 ºC (d) – 0.186 ºC

(iii) Ozone layer is depleted by _____.
(a) NO (b) NO2
(c) NO3 (d) N2O5

(iv) When excess of AgNO3 is added to a complex, one mole
of AgCl is precipitated. The formula of complex is _____.
(a) [CoCl2 (NH3)4]Cl (b) [CoCl (NH3)5]Cl2
(c) [CoCl3 (NH3)3] (d) [Co (NH3)6]Cl3

(v) The value of 'ng for the oxidation of 4 mole of sulphur
dioxide to sulphur trioxide is _____.
(a) –2 (b) 2
(c) –4 (d) 4

0 3 0 2 Page 2

(vi) One dimensional nanostructure amongst the following
is _____.
(a) Nanoparticles (b) Nanotubes
(c) Nanofilms (d) Nanorods

(vii) Which formula co-relates degree of dissociation and
concentration of electrolyte?

(a) c (b)
c

(c) (d) c
a

(viii) The highest acidic compound among the following is
_____.

(a) (b)

(c) (d)

(ix) The formula used to calculate molar conductivity of an
electrolyte is _____.

(a) (b) c
k

(c) (d) k
c

(x) Which of the following is a secondary amine?
(a) Cyclohexylamine
(b) Isopropylamine
(c) Diphenylamine
(d) N, N-Dimethylaniline

0 3 0 2 Page 3 P.T.O

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

(i) Write the structural formula of N, N-dimethylethan-
amine.

(ii) Write the reagents used for the reduction of carbonyl
group in Clemmensen’s reduction.

(iii) Write the IUPAC name of isoprene.

(iv) The rate law equation for AoProduct, is rate = k[A]x
What is the effect of increase in concentration of ‘A’ on
rate of reaction, if x < 0?

(v) What is the molality of an aqueous solution of KBr
having freezing point –3.72ºC (Kf for water is 1.86 K kg
mol–1)?

(vi) Write the balanced chemical equation, when excess of
ammonia is treated with chlorine.

(vii) Write the number of donor atoms present in EDTA,
during formation of complex.

(viii) Write the names of the metal elements in brass alloy.

SECTION - B

Attempt any EIGHT of the following questions : [16]

Q. 3. Derive the relation between half life and rate constant for a first
order reaction.

Q. 4. (a) State Henry’s law.
(b) Define : Osmotic pressure

Q. 5. Write the differences between lanthanoids and actinoids.

0 3 0 2 Page 4

Q. 6. Write anomalous behaviour of oxygen with respect to :
(i) Atomicity
(ii) Oxidation state
(iii) Magnetic property
(iv) Nature of hydrides.

Q. 7. What is the action of :
(i) Liquid bromine in acetic acid on anisole.
(ii) Soda-lime on sodium acetate?

Q. 8. Calculate the work done in kJ in a reaction, if volume of the
reactant decreases from 8 dm3 to 4 dm3 against 43 bar pressure.
[ 1 dm3. bar = 100J ]

Q. 9. Explain ionization isomers with suitable example in complexes.

Q. 10. Write preparation of glucose from sucrose.

Q. 11. How many coulombs of electricity is required to produce 1g of
sodium metal by reduction of sodium ion?

Q. 12. Write the structural formula and IUPAC name of the alcohol
having molecular formula C4H10O which does not undergo
oxidation under normal condition.

Q. 13. Identify ‘A’ and ‘B’ in the following reaction and rewrite the
complete reaction :

3 2

Q. 14. Write the reaction for the preparation of :
(i) acetaldehyde by Rosenmund reaction.
(ii) benzaldehyde by Gatterman-Koch formylation.

0 3 0 2 Page 5 P.T.O

SECTION - C

Attempt any EIGHT of the following questions : [24]

Q. 15. Write the general electronic configuration of 3d series. Draw
the structures of sulphuric acid and thiosulphuric acid.

Q. 16. Define conjugate acid-base pair. The hydroxyl ion concentration
i n aqu eou s sol u t i on of N aOH i s 2 × 10 –4 mol dm–3. Calculate
pH of the solution.

Q. 17. What is atom economy? Explain any two applications of
nanomaterials.

Q. 18. What is peptide bond? How is it formed? Write the name and
formula of the reagent used to convert alkylhalide to
nitroalkane.

Q. 19. (a) Write the reactions for the action of following reagents on
phenol :
(i) Nitrating mixture
(ii) Zinc dust
(b) What is the action of phosphorous pentacholoride on ethyl
methyl ether?

Q. 20. (a) Write the formula to calculate EAN.
(b) Explain formation of [CO(NH3)6]3+ complex ion with
respect to :
(i) Type of hybridisation
(ii) Magnetic property

Q. 21. (a) Calculate spin only magnetic moment of M2+ ion.
[ atomic number of M = 26 ]
(b) Write condensed electronic configuration of Gadolinium
[ Z = 64 ].

0 3 0 2 Page 6

Q. 22. (a) Write the reducing agents used to convert Fe2O3 to ‘Fe’ in
the reduction zone of blast furnace.
(b) Write chemical equations involved in :
(i) Carbylamine reaction for ethylamine.
(ii) Hoffmann Bromamide degradation for acetamide.

Q. 23. (a) Explain Cannizzaro’s reaction with the help of
benzaldehyde.
(b) Write the reaction for the conversion of cyclohexene to
adipic acid.

Q. 24. Define zero order reaction.
A reaction takes place in two steps :
(i) NO(g) + Cl2(g) o NOCl2(g)
(ii) NOCl2(g) + NO(g) o 2NOCl(g)
Write the overall reaction and identify the reaction
intermediate.

Q. 25. 'H for formation of ethane gas is – 84.4 kJ at 300 K. Calculate
'U for the reaction.

Q. 26. Mention the types of polymers formed on the basis of
intermolecular forces. Write any two uses of low density
polyethylene.

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

Q. 27. (a) An element with molar mass 27 g/mol forms a cubic unit
cell with edge length 405 pm. If density of the crystal is
2.7 g cm–3, identify the type of unit cell.
(b) Derive the equation of Raoult’s law for binary solution
containing non-volatile solute.

0 3 0 2 Page 7 P.T.O

Q. 28. (a) State whether entropy change is positive or negative in
the following examples :
(i) Melting of ice
(ii) Vaporisation of a liquid
(b) Explain ‘common ion effect’ with example.

Q. 29. Draw a neat and labelled diagram of a lead accumulator cell.
Write the overall reactions taking place at cathode and anode
during discharging of the cell.

Q. 30. (a) Define a unit cell.
Which colour is shown by NaCl crystal due to formation of
F-centre?
(b) Why does fluorine show anomalous behaviour in ‘17 group’
elements?

Q. 31. (a) Write salient features of SN2 mechanism.
(b) What is the action of following reagents on bromomethane :
(i) bromobenzene
(ii) mercurous fluoride

‹‹‹

0 3 0 2 Page 8

DAY — 08 SEAT NUMBER

2025 II 20 1100 (M)
J-303
CHEMISTRY (55)

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

–
2

–
I
–
II
– 31

(i) R = 8.314 J/K/mol
(ii) Na = 23
(iii) Kf = 1.86 K kg mol–1
(iv) 1F = 96500C
(v) NA = 6.022 × 1023

0 3 0 3 Page 1 P.T.O

(i) (Schottky defect)
NaCl KCl
AgBr NiO

(ii) 0.1 m (freezing point)
Kf 1.86 K kg mol–1
1.86 ºC –1.86 ºC
0.186 ºC –0.186 ºC

(iii) (depletion)
NO NO2
NO3 N2O5

(iv) (complex) AgNO3
AgCl (formula)

[CoCl2 (NH3)4]Cl [CoCl (NH3)5]Cl2
[CoCl3 (NH3)3] [Co (NH3)6]Cl3

(v) 4
'ng
–2 2

–4 4

(vi) (one dimensional)

0 3 0 3 Page 2

(vii) (degree of
dissociation)

c
c

c
a

(viii)

(ix) (molar conductivity)

c
k

k
c

(x)

N, N

(i) N, N

(ii)

0 3 0 3 Page 3 P.T.O

(iii) (isoprene) IUPAC

(iv) Ao = k[A]x

‘A’
x<0

(v) KBr (freezing point) – 3.72°C
(molality)
Kf = 1.86 K kg mol–1]

(vi)

(vii) EDTA (donor)

(viii) (brass)

(anomalous
behaviour)

(i) (ii)

(iii) (iv)

0 3 0 3 Page 4

(i)
(ii)

43 (bar) 8 dm3
4 dm3 (work) kJ
[ 1 dm3. bar = 100J ]

(ionization isomers)

1g

C4H10O
(structure) IUPAC

CH3 CH CH2
HBr

(i)

(ii)

3d

(structure)

0 3 0 3 Page 5 P.T.O

NaOH
2 × 10–4 mol dm–3 pH

(atom economy)
(nanomaterial)

(i)
(ii) Zn

EAN

[CO(NH3)6]3+
(i)
(ii)

M2+ (spin only magnetic
moment)
[M = 26]
(z = 64) (condensed)

Fe2O3 Fe

(i)

(ii)

0 3 0 3 Page 6

(Cannizzaro’s)

(zero order)

(i) N O(g) + Cl 2(g) o NOCl2(g)

(ii) NOCl2(g) + NO(g) o 2NOCl(g)
(intermediate)

300 K 'H – 84.4 kJ
'U

(type)

27 g/mol 405 pm
2.7 g cm–3

(binary)
(Raoult’s law)

(entropy)
(i)
(ii) (vapourization)

0 3 0 3 Page 7 P.T.O

(unit cell).

F- NaCl

) 17 (group)

SN2 (salient features)

(i)
(ii)

‹‹‹

0 3 0 3 Page 8

AglaSem Earn While You Learn Program!

Share your recent question papers with us and get paid!
अपने हाल के न प हम भेज और कमाएँ!

To participate, email us with the following details:
भाग लेने के लए हम न न ववरण के साथ ईमेल कर:

- Your Name
- Your Class
- Your Board
- Details of the Question Papers you have
आपके पास उपल ध न प का ववरण

Our team will reach out to you with the next steps.
हमार ट म आगे क या के लए आपसे संपक करे गी।

Email: support@

Study Materials
Notes

Model Papers Class 6 Notes

Sample Papers Class 7 Notes
Half Yearly Sample Papers Class 8 Notes

Class 9 Notes
Important Resources
Class 10 Notes
Periodic Table
Class 11 Notes
Writing Skills / Formats

Maps of India / World Class 12 Notes

Books and Solutions

NCERT Books
NCERT Book Solutions
HC Verma Chapter Wise Solutions
RD Sharma Solutions
CGBSE Solutions