📚NCERT Questions — CBSE11

Calculate the oxidation number of nitrogen in the nitrate ion, NO3-.

For a chemical reaction involving gases at constant pressure and temperature, what is the relationship between ΔH and ΔU?

If the position of an electron is measured with an accuracy of 0.002 nm, calculate the uncertainty in its momentum. (h = 6.626 x 10⁻³⁴ J s)

What is the relationship between the standard Gibbs energy change (ΔG°) and the equilibrium constant (K) of a reaction?

Express 0.00016 in scientific notation.

If hydrogen and oxygen combine to form water (H2O) and hydrogen peroxide (H2O2), the ratio of oxygen masses that combine with a fixed mass of hydrogen is 1:2. This illustrates which law?

Which type of property can be measured or observed without changing the identity of the substance?

For the reaction CO(g) + H2O(g) <=> CO2(g) + H2(g), Kc = 4.24 at 800K. If initial concentrations of CO and H2O are 0.10 M each, what is the equilibrium concentration of CO2?

Given the following reactions: 1) C(graphite) + O₂(g) → CO₂(g); Δ_r H° = -393.5 kJ mol⁻¹ 2) CO(g) + ½O₂(g) → CO₂(g); Δ_r H° = -283.0 kJ mol⁻¹ Calculate Δ_r H° for C(graphite) + ½O₂(g) → CO(g).

What is the mathematical definition of dipole moment (μ)?