📚NCERT Questions — CBSE11

Indicate the number of unpaired electrons in P (Z=15).

How many seconds are there in 2 days? (1 day = 24 hours, 1 hour = 60 minutes, 1 minute = 60 seconds)

How does bond dissociation enthalpy relate to the strength of a bond?

An oxidizing agent (oxidant) is a reagent that:

What is the definition of Gibbs energy (G)?

If the pH of a solution changes by one unit, what is the corresponding change in hydrogen ion concentration?

If 10 volumes of dihydrogen gas reacts with 5 volumes of dioxygen gas, how many volumes of water vapour would be produced? (Assume constant T and P)

For the oxidation of iron, 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s), Δ_r H° = -1648 × 10³ J mol⁻¹ and Δ_r S° = -549.4 J K⁻¹ mol⁻¹ at 298 K. Is the reaction spontaneous?

What is bond angle defined as?

Which halogen is the strongest oxidizing agent among fluorine, chlorine, bromine, and iodine?