π§ͺ 11th Chemistry Important Two Mark Questions β Public Exam 2025
π Boost Your Chemistry Score with 2-Mark Questions!
Prepare for the 11th Chemistry Public Exam 2025 with our chapter-wise important two mark questions selected from previous year board exam papers. These questions help students quickly revise key concepts and secure easy marks in the exam.
πΉ Chapter-wise 2-mark questions with answers
πΉ Based on Tamil Nadu Board syllabus
πΉ Repeated questions from previous year question paper
πΉ Covers Organic, Inorganic & Physical Chemistry
Chapter 1 : Basic Concepts of Chemistry and Chemical
Calculations
- DefineΒ – Mole?Ln1
- What do you understand by the term oxidation number?Ln1
- Define equivalent mass?Ln1
- Find emprical formula of fructose C6H12O6 and Caffeine C8H10N4O2? Ln1
- fructose C6H12O6 – CH6O
- Caffeine C8H10N4O2 – C4H5N2O
- Define avogadro number?Ln1 Pg7
- Define relative atomic mass?Ln1 Pg4
Chapter 2 : Quantum Mechanical Model of Atom
- State pauli Exclusion principle? Ln2
- State ( n+l ) rule (Pg No : 51)
- State Hundβs rule (Pg No : 53)
- Define exchange energy (Pg No : 56)
- State Heisenbergβs uncertainty principle (Pg No : 42)
- How many orbitals are possible for n = 4?Ln2 (Pg No : 46)
- Define Principal quantum number?Ln2 (Pg No : 45)
- Define Azimuthal quantum number?Ln2 (Pg No : 45)
- Define Magnetic quantum number, spin quantum numberLn2 (Pg No : 46)
- Give the electronic confiuration of Mn2+ and Cr3+?Ln2 BB39
Chapter 3 : Periodic Classification Of Elements
- State Modern periodic Law?Ln3
- Define electronegativity?Ln3
- Ionisation potential of N is greater than that of O.Why?Ln3 BB44
Chapter 4 : Hydrogen
- What are isotopes? Write the names of isotopes of hydrogen?
- Give the uses of heavy water?
- Justify the position of hydrogen in the periodic table ?
- Mention the uses of deuterium?
Chapter 5 : Alkali and Alkaline Earth Metals
- what is plaster of paris ?How is it prepared?Ln5
- Give the colour of the following metal in flame?Ln5
- Give the uses of calcium?Ln5 Pg141
- Write any two uses of sodium carbonate?Ln5 Pg133
- An alkali metal (x) forms a hydrated sulphate, X2 SO4 . 10H2 O. Is the metal more likely to be sodium (or) potassium.?Ln5
Chapter 6 : Gaseous State
- Define Joule Thomson effect?Ln6
- State daltons law of partial pressure?Ln 6
- State boyle’s law?Ln6
- Would it be easier to drink water with a straw on the top of mount everest?Ln6 BB39
- State Gay – Lussac’s law?Ln6 Pg164
Chapter 7 : Thermodynamics
- State the various statements of second law of thermodynamics?Ln7 Pg210
- State zeroth law of thermodynamics?Ln7
- What is heat of combustion?Ln 7
- What is extensive properties? Give any two example?Ln 7
- What is Lattice energy?Ln7
- Define gibbs free energy?Ln7
- Write the third law of thermodynamics?Ln7 Pg217
Chapter 8 : Physical and Chemical Equilibrium
- Write a balanced chemical equation for the equilibrium reaction for which the equilibrium constant is given by expression Ln8 BB37
- State Chatelier’s Principle?Ln 8
- State law of mass action?Ln8 Pg5
Chapter 9 : Solutions
- State Henry’s law? Ln9
- What are the limitations of henry’s Law?Ln9
- What is osmotic pressure?Ln9 Pg : 55
- Define the term isotonic solution?Ln9 Pg56
- Define mole fraction?Ln9 Pg33
Chapter 10 : Chemical bonding
- Draw the Lewis dot structures for Ammonia and Methane?Ln10 Pg71
- State Lewis – Octate Rule?Ln10
- Define the following
- i) Bond order
- ii) Hybridisation
- iii) Ο- bond
- Draw MO diagram of CO and calculate its bond order.
- Draw the Lewis structures for the following species.
- i) NO3
- ii) SO4
- Define bond energy?
- What is dipolemoment?
Chapter 11 : Fundamentals of Organic Chemistry
- Give the Iupac name of the following compounds?Ln11
- CH3 – O – CH3
- CH2 = CH – CH = CH2
- What are homologous series? Give example Ln11
- Write the function group for the following?Ln11
Chapter 12 : Basic concept of organic reactions
- What are electrophiles and nucleophiles? Give suitable examples for each.
- Explain inductive effect with suitable example?
- Explain electromeric effect?
- Give examples for the following types of organic reactions
- (i) Ξ² – elimination
- (ii) electrophilic substitution
Chapter 13 : Hydrocarbons
- Write short note on wurtz reaction?Ln 13
- How will you convert ethyl chloride in to i) ethane ii) n β butane? Ln13
- Write note on Friedel craftβs reaction ?Ln13Pg : 210
- How toluene is prepared by Wurtz-Fitting reaction?Ln13 Pg210
Chapter 14 : Haloalkanes and Haloarenes
- How will you prepare phenol by Dow’s Process?Ln 14
- Write williamson’s Ether Synthesis?Ln14
- Complete the following reaction?Ln14 Pg 225
- What are Freons? Discuss their uses?
- Write short notes on the the following
- i) Raschig process
- ii) Dows Process
- iii) Darzens process
Chapter 15 : Environmental Chemistry
- What is particulate pollutant?Ln15
- Differentiate the following (i) BOD and COD (ii) Viable and non-viable particulate pollutants?Ln15
- What would happen, if the greenhouse gases were totally missing in the earthβs atmosphere?
- Define smog?
- What are degradable and nondegradable pollutants?
- What is green chemistry?
- How is acid rain formed? Explain its effect?
π Quick Links for Exam Success:
β 11th Chemistry 3-Mark Questions 2025
β 11th Chemistry 5-Mark Questions 2025
β 11th Chemistry important two, Three & Five mark questions 2025
β 11th Public Exam Study Plan PDF
π― Why Focus on 2-Mark Questions in 11th Chemistry?
Two-mark questions are a crucial part of the Chemistry public exam, covering definitions, chemical reactions, numerical problems, and key concepts. Mastering these ensures full marks in this section.
π Chapter-wise 2-Mark Questions Covered:
πΉ Organic Chemistry β Hydrocarbons, Alcohols, Ethers, Carbonyl Compounds
πΉ Inorganic Chemistry β Coordination Compounds, P-Block Elements, Metallurgy
πΉ Physical Chemistry β Electrochemistry, Chemical Kinetics, Thermodynamics
πΉ Solid State, Solutions & Surface Chemistry
π’ More 11th Physics Exam Resources:
π 11th physics important two marks public exam 2025
π 11th physics important three marks public exam 2025
π 11th physics important three marks public exam 2025
π’ External References for Chemistry Exam Preparation:
π 11th Chemistry One mark shortcuts 2025
π 11th chemistry public exam 2025 study plan
π Maximize Your Scores! Visit Padidaa.com for the latest 11th Public Exam updates, study materials, and video lectures! π―