GOVERNMENT OF KARNATAKA
DEPARTMENT OF SCHOOL EDUCATION (PRE-UNIVERSITY)
MODEL QUESTION PAPER
Class: I Year PUC Academic Year: 2024-25
Subject: Chemistry (34) Maximum Marks: 70
Time: 3.00 Hours No. of Questions: 48
Instructions
1. Question paper has FIVE parts. All parts are compulsory.
2. a. Part-A carries 20 marks. Each question carries 1 mark.
b. Part-B carries10 marks. Each question carries 2 marks.
c. Part-C carries18 marks. Each question carries 3 marks.
d. Part-D carries10 marks. Each question carries 5 marks.
e. Part-E carries 12 marks. Each question carries 4 marks.
3. In Part-A questions, first attempted answer will be considered for awarding marks.
4. Write balanced chemical equations and draw neat labeled diagrams and graphs wherever necessary.
5. Direct answers to the numerical problems without detailed steps and specific unit for final answer will not
carry any marks.
6. Use log tables and simple calculator if necessary (use of scientific calculator is not allowed).
7. For a question having circuit diagram/figure/graph/diagram, alternate questions are given at the end of
question paper in a separate section for visually challenged students.
PART-A
I. Select the correct option from the given choices. 15×1=15
1. The prefix used for the multiple 10–6 is
a) Macro b) micro c) nano d) milli
2. If two volumes of gas give one volume of A 2(g) and one volume of B2(g) , then molecular
formula of the gas will be (i) A2B2 (ii) A4B4 (iii) AB
a) only (i) b) only (iii) c) both (i) and (ii) d) only (ii)
3. An atom of an element contains 19 electrons. Its nucleus has 20 neutrons. Its mass number is
a) 29 b) 28 c) 01 d) 39
4. The chemical properties of atoms are controlled by number of
a) nucleus b) protons c) electrons d) neutrons
5. Choose the correct order of atomic and ionic radii of chlorine atom and chloride (Cl–) ion (in
ppm) is
a) 136 and 90 b) 167 and 99 c) 99 and 99 d) 186 and 90
6. The valency of noble gases is ______.
a) 3 b) 2 c) 1 d) 0
I PU CHEMISTRY (34) MODEL PAPER 24-25 Page 1
, 7. Conversion of O2 → O2+ involves removal of electron from
a) Antibonding π (Pi) orbital b) Bonding π (Pi) orbital
c) Antibonding σ (sigma) orbital d) Bonding σ (sigma) orbital
8. The example for intensive property is
a) internal energy b) temperature c) enthalpy d) heat capacity
9. The change in internal energy (∆U) for an isolated system when there is no transfer of energy as
heat or as work will be equal to.
a) q b) w c) 0 d) 1
10. Statement 1: Equilibrium is possible only in a closed system at a given temperature.
Statement II: At equilibrium all measurable properties of the system remain constant.
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.
11. Match the following elements in compounds with their oxidation state:
Element Oxidation state
A) Oxygen in potassium superoxide i) +1
B) Hydrogen in metal hydrides 1
ii)
2
C) Sodium in rock salt iii) zero
D) Silver in silver amalgam iv) –1
a) A) → i); B) → ii); C) → iii); D) → iv) b) A) → ii); B) → iv); C) → i); D) → iii)
c) A) → ii); B) → iii); C) → i); D) → iv) d) A) → iii); B) → iii); C) → i); D) → ii)
12. Which of the following will not show resonance
a) C6H6 b) C6H12 c) CH3NO2 d) C6H5COO–
13. An important property of carbon that has made carbon to be a backbone element of organic
compounds.
a) catenation b) allotropy c) isotopes d) tetravalency
14. Spatial arrangements of atoms which can be converted into one another by rotation around a
C – C single bond are called.
a) Rotamers b) Metamers c) Mesomers d) Chain isomers
15. Which of the following reagent will produce trans alkenes from reduction of alkynes
a) H2/Pt b) H2/Pd c) H2/Ni d) Na / liquid NH3
II. Fill in the blanks by choosing the appropriate word from those given in the brackets:
(strong acid, azo, weak base, charges, Rubidium, Fluorine) 5×1=5
16. The element discovered by spectroscopic method is ____________.
I PU CHEMISTRY (34) MODEL PAPER 24-25 Page 2
DEPARTMENT OF SCHOOL EDUCATION (PRE-UNIVERSITY)
MODEL QUESTION PAPER
Class: I Year PUC Academic Year: 2024-25
Subject: Chemistry (34) Maximum Marks: 70
Time: 3.00 Hours No. of Questions: 48
Instructions
1. Question paper has FIVE parts. All parts are compulsory.
2. a. Part-A carries 20 marks. Each question carries 1 mark.
b. Part-B carries10 marks. Each question carries 2 marks.
c. Part-C carries18 marks. Each question carries 3 marks.
d. Part-D carries10 marks. Each question carries 5 marks.
e. Part-E carries 12 marks. Each question carries 4 marks.
3. In Part-A questions, first attempted answer will be considered for awarding marks.
4. Write balanced chemical equations and draw neat labeled diagrams and graphs wherever necessary.
5. Direct answers to the numerical problems without detailed steps and specific unit for final answer will not
carry any marks.
6. Use log tables and simple calculator if necessary (use of scientific calculator is not allowed).
7. For a question having circuit diagram/figure/graph/diagram, alternate questions are given at the end of
question paper in a separate section for visually challenged students.
PART-A
I. Select the correct option from the given choices. 15×1=15
1. The prefix used for the multiple 10–6 is
a) Macro b) micro c) nano d) milli
2. If two volumes of gas give one volume of A 2(g) and one volume of B2(g) , then molecular
formula of the gas will be (i) A2B2 (ii) A4B4 (iii) AB
a) only (i) b) only (iii) c) both (i) and (ii) d) only (ii)
3. An atom of an element contains 19 electrons. Its nucleus has 20 neutrons. Its mass number is
a) 29 b) 28 c) 01 d) 39
4. The chemical properties of atoms are controlled by number of
a) nucleus b) protons c) electrons d) neutrons
5. Choose the correct order of atomic and ionic radii of chlorine atom and chloride (Cl–) ion (in
ppm) is
a) 136 and 90 b) 167 and 99 c) 99 and 99 d) 186 and 90
6. The valency of noble gases is ______.
a) 3 b) 2 c) 1 d) 0
I PU CHEMISTRY (34) MODEL PAPER 24-25 Page 1
, 7. Conversion of O2 → O2+ involves removal of electron from
a) Antibonding π (Pi) orbital b) Bonding π (Pi) orbital
c) Antibonding σ (sigma) orbital d) Bonding σ (sigma) orbital
8. The example for intensive property is
a) internal energy b) temperature c) enthalpy d) heat capacity
9. The change in internal energy (∆U) for an isolated system when there is no transfer of energy as
heat or as work will be equal to.
a) q b) w c) 0 d) 1
10. Statement 1: Equilibrium is possible only in a closed system at a given temperature.
Statement II: At equilibrium all measurable properties of the system remain constant.
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.
11. Match the following elements in compounds with their oxidation state:
Element Oxidation state
A) Oxygen in potassium superoxide i) +1
B) Hydrogen in metal hydrides 1
ii)
2
C) Sodium in rock salt iii) zero
D) Silver in silver amalgam iv) –1
a) A) → i); B) → ii); C) → iii); D) → iv) b) A) → ii); B) → iv); C) → i); D) → iii)
c) A) → ii); B) → iii); C) → i); D) → iv) d) A) → iii); B) → iii); C) → i); D) → ii)
12. Which of the following will not show resonance
a) C6H6 b) C6H12 c) CH3NO2 d) C6H5COO–
13. An important property of carbon that has made carbon to be a backbone element of organic
compounds.
a) catenation b) allotropy c) isotopes d) tetravalency
14. Spatial arrangements of atoms which can be converted into one another by rotation around a
C – C single bond are called.
a) Rotamers b) Metamers c) Mesomers d) Chain isomers
15. Which of the following reagent will produce trans alkenes from reduction of alkynes
a) H2/Pt b) H2/Pd c) H2/Ni d) Na / liquid NH3
II. Fill in the blanks by choosing the appropriate word from those given in the brackets:
(strong acid, azo, weak base, charges, Rubidium, Fluorine) 5×1=5
16. The element discovered by spectroscopic method is ____________.
I PU CHEMISTRY (34) MODEL PAPER 24-25 Page 2
