Class 11 Chemistry Target paper 2025
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Class XI (Chemistry)
Target paper 2025
Section "A"
(Multiple choice questions)
Note: This section consists of 17 part questions and all are to be answered. Each question carries one mark.
Section "B"
(Short Question - Answer)
Note: Answer any nine part questions. All questions carry equal marks.
Define any four of the following:
Exponential notation, Rate of expression Limiting reactant Hear of formation, Molar volume, Stoichiometry Latent heat of fusion, Unit cell, Boiling point Threshold energy, Dipole moment, Bond energy Avogadro's number, Random error, Evaporation
Differentiate between the following:
Valence Bond Theory and molecular orbital theory
Sigma bond and pi bond
Line spectrum and continuous spectrum Isomorphism and polymorphism
Polar and non-polar Bond
Azimuthal quantum number and principal quantum number
Electronegativity and electron affinity
Give any four scientific reasons for the following:
Evaporation is a cooling process
Milk sour more rapidly in summer than in winter Water has high boiling point than HF
Glycerin is distilled at reduced pressure
Carbon dioxide has zero dipole moment
At Mount Everest, atmospheric pressure fails down to about one third pressure at sea level
A liquid is less viscous and high temperature Why the compressibility of solid is nearly zero?Why some solid are sublime in nature
Mercury has its meniscus upward
Chap 3, 4,5, 6, 9.
➤ Define theoretical yield, actual yield and present yield? why are practical yield is often less than theoretical yield?
➤ Write the four main postulate of Bohr's atomic theory?
➤ Define radioactivity, why is it limited to heavy elements?
➤ Give three properties of alpha and beta particles?
➤State Hund's rule, Pauli's rule, (n + 1) rule, Aufbau principle?
➤ What is covalent bond, Explain ionic character of covalent bond?
➤ What is ideal gas, derive the general gas equation?
➤ What are the causes of deviation of the real gases from ideal behavior?
➤ Write the postulates of kinetic molecular theory of gases?
➤What is the fourth state of matter? State about its occurrence, characteristics and uses? ➤State and explain Dalton law of partial pressure with its application? What is viscosity? Why viscosity decrease with the rise of temperature?
➤ Define liquid crystals and it's uses?
➤Explain Lewis theory of acid and base?
➤ What is buffer solution and its application? What is order of reaction? Write the rate law? ➤State Raoult's Law. Derive this law mathematically in three forms?
➤How this law can be applied on binary solution of miscible liquid?
➤ What is colloids? State the properties of colloids?
Numericals:
Chap # 1 (2)
Chap #2 (1) (Electronic configuration)
Chap #4 (1)
Chap #7 (2) "short & long" Kc
Chap #9 (1) order of reaction
Section "C"
(Detailed - Answer Questions)
Note: Attempt any two questions from this section. All questions carry equal marks.
➤ Derive an expression for radius of nth orbit in hydrogen atom?
➤ What is hybridization? Write about its types in detail?
OR
Explain the structure of five basic shapes on the basis of VSEPR?
➤ What is unit cell? Sketch a unit cell and label the dimensions a,b,c an angle alpha, beta & gamma. How do cubic and tetragonal system differ?
➤State Le-Chatelier's principle? Explain the industrial application of Le- Chatelier's principle using Haber's process?
➤ Define Rate of reaction? Explain Factor affecting the rate of reaction?
OR
Define catalyst and explain types of catalyst?
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