📚NCERT Questions — CBSE11
591 solved questions with detailed explanations
The electronic configuration of Chromium (Cr, Z=24) is an exception to the Aufbau principle. Its actual configuration is 3d⁵4s¹. What is the reason for this exception?
The ionization constant of HF is 3.2 x 10^-4. Calculate the degree of dissociation (α) of HF in its 0.02 M solution.
For which of the following homonuclear diatomic molecules is the energy of the σ2pz molecular orbital *lower* than the π2px and π2py molecular orbitals?
Which of the following is a characteristic of a system at equilibrium in physical processes?
J.J. Thomson's model of the atom is often referred to as the:
A calorimeter for measuring heat changes at constant pressure typically uses which type of setup?
When a strip of metallic zinc is placed in an aqueous solution of copper nitrate, what observation is made?
A piece of metal is 3 inches long. What is its length in cm? (1 inch = 2.54 cm)
Calculate the entropy change in surroundings when 1.00 mol of H₂O(l) is formed under standard conditions. Δ_f H°(H₂O,l) = -286 kJ mol⁻¹.
How many radial nodes does a 3s orbital have?