KSEAB II PU Chemistry Model Question Paper 2025 Karnataka

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KSEAB II PU Chemistry Model Question Paper 2025 Karnataka

Organisation : Karnataka School Examination & Assessment Board (KSEAB)
Class Name : II PU
Subject : Chemistry
Download : Model Question Paper 2025
Website : https://dpue-exam.karnataka.gov.in/ModelQp2025/frmkmpdamodelpapers

KSEAB II PU Chemistry Model Question Paper

I. Select the correct option from the given choices:

Related / Similar Question Paper : KSEAB II PU Physics Model Question Paper 2025 Karnataka

1. The role of CO2 in Kolbe’s reaction is
a) acts as catalyst
b) act as nucleophile
c) act as weak electrophile
d) act as strong electrophile.

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2. In DNA, the linkage between different nitrogenous bases is
a) phosphate linkage
b) glycosidic linkage
c) peptide linkage
d) hydrogen bonding.

3. The complex PtCl2.4NH3Br2 is treated with excess of AgNO3 solution, two mole of AgBr is precipitated. The primary and secondary valence of this complex is
a) 6 and 1
b) 6 and 2
c) 4 and 6
d) 3 and 6

4. Statement I: Enantiomers are non-superimposable mirror images on each other.
Statement II: A racemic mixture shows zero optical rotation.
Identify the correct statement
a) Both statement I and II are correct
b) Both statement I and II are incorrect
c) Statement I is correct and statement II is incorrect.
d) Statement I is incorrect and statement II is correct.

5. The most stable manganese compound is
a) Mn2O7
b) MnF4
c) MnO2
d) MnSO4

7. An ambidentate ligand is
a) Cl–
b) CN–
c) OH–
c)2NO+

8. The Eo of Fe2+/Fe, Zn2+/Zn and Sn2+/Sn are –0.44 V, –0.76 V and –0.14 V respectively. Which metal/s is/are act as sacrificial electrode to protect iron from rusting?
a) Both Zn and Sn
b) Zn only
c) Sn Only
d) neither Zn nor Sn.

9. The chemical name of phosgene is
a) chromyl chloride
b) triphenylphosphine
c) phosphorusoxychloride
d) carbonyl chloride.

10. In a solution containing non-volatile solute, the mole fraction of solvent is 0.9. The relative lowering of vapour pressure is
a) 1
b) 0.1
c) 0.9
d) 1.1

11. All natural and artificial radioactive decay of unstable nuclei take place by
a) zero order kinetics
b) half order kinetics
c) first order kinetics
d) second order kinetics

12. Match the following
List-I List-II
A) Glucocorticoids i) Responsible for development of secondary female characteristics.
B) Mineralocorticoids ii) Responsible for preparing the uterus for implantation of fertilised egg
C) Testosterone iii) Control carbohydrates metabolism
D) Estradiol iv) Responsible for development of secondary male characteristics.
v) Control level of excretion of water and salt by kidney.

a) A-(iv), B- (v), C-(ii), D-(i)
b) A-(iii), B-(v), C-(iv), D-(i)
c) A-(ii), B-(i), C-(v), D-(iv)
d) A-(iii), B-(ii), C-(iv), D-(i)

13. p-Aminoazobenzene is prepared from benzenediazonium chloride and aniline in
a) acidic medium
b) basic medium
c) neutral medium
d) both acidic and basic medium.

14. The chemicals used to convert commercial alcohol into denatured alcohol are
a) CuSO4 and Pyrolidine
b) Cu2S and Pyrolidine
c) CuSO4 and Pyridine
d) Cu2S and Pyridine.

15. During osmosis, the solvent molecules are moving from
a) Hypotonic solution to hypertonic solution
b) Hypertonic solution to hypotonic solution
c) Higher concentrated solution to lower concentrated solution
d) Higher osmotic pressure solution to lower osmotic pressure solution.

II. Fill in the blanks by choosing the appropriate word from those given in the brackets:
(aldehydes, phenol, fluorobenzene, decreases, greater, benzene) 5×1= 05
16. The melting point of interstitial compound is ________ than the pure metal.
17. Benzenediazonium fluoroborate on heating decomposes to give_________
18. The simplest hydroxy derivative of benzene is _________
19. When a non-volatile solute is added to the pure solvent, the freezing point of solvent______
20. Ozonolysis of alkenes followed by reaction with zinc dust and water gives ____

III. Answer ANY THREE of the following. Each question carries two marks:
21. Explain Swartz reaction with an example.
22. Write the reactions show that glucose contains a) five hydroxyl groups b) aldehyde group.
23. Define half-life period of a reaction. Write the relationship between half-life period and initial concentration of zero order reaction.
24. Write the reactions involved in preparation of phenol from cumene.