CBSE Class 11-science Answered

Hi,

From the chapter Structure of atom,

Thomson model and postulates

Rutherford’s model and Rutherford model experiment and drawbacks

Why Rutherford has taken gold foil for the experiment

What do you think would be the observation if the α-particle scattering experiment is carried out using a foil of a metal other than gold?

Draw a sketch of Bohr’s model of an atom with three shells.

Concept of distribution of electrons in different orbit or shell

Questions like- If number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?

Nature of electromagnetic radiation, photoelectric effect; spectrum of hydrogen atom

De-Broglie’s relationship

Heisenberg uncertainty principle

various quantum numbers (principal, angular momentum and magnetic quantum numbers) and their significance; shapes of s, p and d-orbitals,

Electron spin and spin quantum number; rules for filling electrons in orbitals–Aufbau principle, Pauli’s exclusion principle and Hund’s rule, electronic configuration of elements.

From the chapter Chemical equilibrium

Concept of dynamic equilibrium.

Equilibria involving physical processes: Solid-liquid, liquid-gas and solid-gas equilibria,

Henry’s law,

Equilibria involving chemical processes: Law of chemical equilibrium, equilibrium constants (Kp and Kc) and their significance, significance of G and Go in chemical equilibria, factors affecting equilibrium concentration, pressure, temperature, effect of catalyst;

Le Chatelier’s principle,

Ionic equilibrium: Weak and strong electrolytes, ionization of electrolytes, various concepts of acids and bases (Arrhenius, Bronsted-Lowry and Lewis) and their ionization,

Acid-base equilibria (including multistage ionization) and ionization constants, ionization of water,

pH scale,

Common ion effect,

Buffer solutions