📚NCERT Questions

Given Δ_r H° = -92.4 kJ mol⁻¹ for N₂(g) + 3H₂(g) → 2NH₃(g), what is the standard enthalpy of formation of NH₃ gas?

Which of the following groups are generally considered electron-donating groups?

Indicate the number of unpaired electrons in Kr (Z=36).

If a person has a spinal cord injury, which signals are most likely to be disrupted?

Why are the methods for preparing alkyl halides from alcohols not applicable for the preparation of aryl halides from phenols?

What is the hybridisation of the central atom in [Ni(CN)4]2-?

In the reaction S(s) + O₂(g) → SO₂(g), which species is oxidised according to the classical definition?

The tendrils of a pea plant cling to a support due to:

Consider the unbalanced equation: Fe + H₂O → Fe₃O₄ + H₂. To balance the oxygen atoms, what coefficient should be placed in front of H₂O?

Which of the following reducing agents can convert diazonium salts to arenes?