BSEH Class 12th Chemistry Question Paper March 2025 Haryana
Organisation : Board of School Education Haryana (BSEH)
Exam : Senior Secondary Exam (Class 12th)
Document Type : Question Paper
Subject : Chemistry
Year : March 2025
Website : https://bseh.org.in/srsec-old-question-paper-march-2025
BSEH Haryana Class 12 th Chemistry Question Paper
Download Board of School Education Haryana (BSEH) Senior Secondary Exam (Class 12th) March 2025 Chemistry Question Paper.
Related / Similar Question Paper : BSEH Class 12th Computer Science Question Paper March 2025 Haryana
BSEH Haryana Class 12th Chemistry Questions
Section-A : [ Objective Type Questions ]
Select the correct option of the following multiple choice questions (1-9) :
1. Which of the following is not a colligative property ?
(A) relative lowering of vapour pressure
(B) elevation in boiling point
(C) depression in freezing point
(D) depression in boiling point
2. During electrolysis of aqueous solution of NaCl, the products formed are :
(A) Na, Cl2
(B) NaOH, Cl2, H2
(C) Na, Cl2, NaOH
(D) H2, Cl2
3. The major use of chloroform today is :
(A) In the production of Freon refrigerant R-22
(B) As an anaesthetic in surgery
(C) In the production of medicines
(D) All of the above
4. Reaction of bromine water with phenol gives :
(A) 2, 4, 6-Tribromophenol
(B) o-Bromophenol and p-Bromophenol
(C) o-Bromophenol
(D) p-Bromophenol
5. Which of the following is most basic ?
(A) C6H5NH2
(B) NH3
(C) C2H5NH2
(D) ( C2H5)2NH
6. Hofmann bromamide degradation reaction is shown by :
(A) CH3CH2NH2
(B) CH3CH2NO2
(C) CH3CONH2
(D) CH3CH2CN
7. What type of isomers [Co(NH3)5Cl]SO4 and [Co(NH3)5(SO4)]Cl are ?
(A) Linkage
(B) Coordination
(C) Ionisation
(D) Solvate
Fill in the blanks in following questions (10-12) :
10. Coordination number of Pt in 2+ [PtCl2(en)2] is …………. .
11. Vapour of primary alcohols when passed over heated copper at 573 K, products formed are ………….
Answer the following questions in one word/sentence :
1. The conversion of molecule X to Y follows third order kinetics. If concentration of X is increased to three times, how will it affect the rate of formation of Y ?
2. The deficiency disease ‘Increased blood clotting time’ is caused by deficiency of which Vitamin ?
3. Write overall reaction of mercury cell.
Assertion [A] : On addition of non-volatile solute in a pure solvent, boiling point of the solution increases.
Reason [R] : On addition of non-volatile solute in a pure solvent, vapour pressure of solution increases.
Code :
(A) Both [A] and [R] are true and [R] is the correct explanation of [A].
(B) Both [A] and [R] are true, but [R] is not the correct explanation of [A].
(C) [A] is true, but [R] is false.
(D) [A] is false, but [R] is true.
Assertion [A] : A catalyst increases the rate of reaction without itself undergoing any permanent chemical change.
Reason [R] : A catalyst does not alter Gibbs energy, ∆G of a reaction.
Code :
(A) Both [A] and [R] are true and [R] is the correct explanation of [A].
(B) Both [A] and [R] are true, but [R] is not the correct explanation of [A].
(C) [A] is true, but [R] is false.
(D) [A] is false, but [R] is true.
Assertion [A] : The ortho and para isomers of nitrophenol can be separated by steam distillation.
Reason [R] : o-nitrophenol is steam volatile due to intra-molecular hydrogen bonding while p-nitrophenol is less volatile due to inter- molecular hydrogen bonding which causes the association of molecules.
Code :
(A) Both [A] and [R] are true and [R] is the correct explanation of [A].
(B) Both [A] and [R] are true, but [R] is not the correct explanation of [A].
(C) [A] is true, but [R] is false.
(D) [A] is false, but [R] is true.
Section-B : [Very Short Answer Type Questions]
1. Define the following terms :
(i) Azeotropes
(ii) Osmotic pressure
2. How much electricity in term of Faraday is required to produce ?
(i) 20.0 gram of Ca from molten CaCl2
(ii) 40.0 gram of Al from molten Al2O3
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