📚NCERT Questions — CBSE11

What is the potential associated with each electrode in an electrochemical cell called?

Perform the subtraction: (2.5 x 10^-2) - (4.8 x 10^-3).

If the pKb of ammonia (NH3) is 4.75, what is the Ka for its conjugate acid (NH4+)? (Kw = 1.0 x 10^-14)

If the reaction H2(g) + I2(g) <=> 2HI(g) has an equilibrium constant Kc = x, what is the equilibrium constant for the reaction (1/2)H2(g) + (1/2)I2(g) <=> HI(g)?

What is the effect of a catalyst on a chemical equilibrium?

For an isothermal expansion of an ideal gas into a vacuum, what are the values of work (w), heat (q), and internal energy change (ΔU)?

What is a pi (π) bond?

For an exothermic reaction (negative ΔH), how does increasing the temperature affect the equilibrium constant?

The standard enthalpy of fusion (Δ_fus H°) for water is 6.00 kJ mol⁻¹. What does this value indicate about the process of melting?

Calculate the energy required to ionize a H atom if the electron occupies n=5 orbit. (Ionization energy for H atom in ground state is 2.18 x 10⁻¹⁸ J atom⁻¹)