📚NCERT Questions — CBSE11

How many significant figures are there in the number 0.0052?

Which ancient Indian text describes the preparation of gunpowder mixture?

What is the common ion effect in the context of acid-base equilibria?

What is a key characteristic of a disproportionation reaction?

A negative standard electrode potential (E°) for a redox couple indicates that it is:

Calculate the average oxidation number of iron in Fe3O4.

The de Broglie relation describes the wave-particle duality of matter and is given by:

Which of the following is an example of a basic buffer solution?

How is the oxidation number of a metal represented in Stock notation?

If the molar enthalpy change for vaporization of 1 mol of water at 1 bar and 100°C is 41 kJ mol⁻¹, calculate the internal energy change (ΔU) for this process. Assume water vapor behaves as an ideal ga