📚NCERT Questions
1,675 solved questions with detailed explanations
In the mechanism of electrophilic substitution in benzene, the intermediate formed after the attack of the electrophile is called:
For a process occurring at constant temperature and pressure, what is the relationship between Gibbs energy change (ΔG), enthalpy change (ΔH), and entropy change (ΔS)?
What is the magnetic property of O22- (peroxide ion)?
What is the primary principle of VSEPR theory?
Which polysaccharide is known as 'animal starch' due to its storage function in animals and its highly branched structure?
Which of the following orbitals has the lowest energy according to the (n+l) rule?
Which acid is present in oranges and lemons?
Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wavelength associated with the electron revolving around the orbit.
Given the enthalpies of formation: CO(g) = -110 kJ mol⁻¹, CO₂(g) = -393 kJ mol⁻¹, N₂O(g) = 81 kJ mol⁻¹, N₂O₄(g) = 9.7 kJ mol⁻¹. Calculate Δ_r H for the reaction: N₂O₄(g) + 3CO(g) → N₂O(g) + 3CO₂(g).
How do metals form ions when reacting with non-metals?