📚NCERT Questions
1,675 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?
Which of the following groups, when substituted on an aniline ring, would increase its basic strength?
If a chemical equation has an unequal number of atoms of an element on both sides of the equation, it is called a(n):
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?
The gap between two neurons where chemical signals are transmitted is known as a:
A reagent that brings an electron pair to the reactive site is called a:
What is the primary difference between a nucleoside and a nucleotide?
Which of the following is a characteristic of a system at equilibrium in physical processes?
Which of the following is the correct IUPAC name for the compound with the structure CH₃-CH₂-CH(CH₂CH₃)-CH₂-CH(CH₃)-CH₂-CH₃?