Chemistry NCERT Exemplar Solutions Class 11th Chapter Two

Sol. (x/m) = k (P)¹/?
log (x/m) = logk + 1/n logP
Slope = 1/n = 2 So n = 1/2
Intercept ⇒ logk = 0.477 So k = Antilog (0.477) = 3
So (x/m) = k (P)¹/? = 3² = 48

189000 to 190000
Sol. ΔH = ΔU + Δn? RT
41000 * 5 = ΔU + 5 * 8.314 * 373
205000 = ΔU + 15505.61
ΔU = 189494.39 J = 189494 J

The oxidation states of iron in these compounds will be
A = +2
B = +4
C = 0
The sum of oxidation states will be = 6.

Sol. E? cell = E? (Sn²? |Sn) - E? (Cu²? |Cu)
= -0.16 - 0.34 = -0.50V
ΔG? = -nFE? cell
= -2 * 96500 * (-0.5) = 96500 J
= 96.5 kJ = 96500 J

Kindly consider the following Image

According to the de Broglie equation, the particles like electrons have wave-like properties. The quantum mechanical model foundation is laid by this concept and it also explains the stability of electron orbits using wave behavior.

The hydrogen atom can be accurately explained by Bohr's model. However, it does not account for shielding effects, electron-electron interactions, and the wave nature of electrons for multi-electron atoms.

Quantum numbers describe the unique position and energy of an electron in an atom. These are a set of four numbers and are important for predicting chemical behavior and understanding the distribution of electrons in orbitals.

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: option  (iii)

According to Heisenberg's uncertainty principle it is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron. Thus, it implies that determining the trajectory of

an electron is impossible as it requires exact position and velocity which is not possible as per the uncertainty principle.

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Ans: option (ii)

The black body is the ideal body that absorbs and emits radiation of all frequencies. The radiation that it emits is said to be black body radiation. With an increase of temperature, the frequency of the black body radiation increases.