Question

Which among the following is incorrect statement?
(A) Black body radiation is discontinuous but black body radiation will give continuous spectrum.
(B) On doubling frequency of incident radiation, photo current is more than doubled
(C) 4p-orbital has two radial nodes and one angular node
(D) Both energy and angular momentum are quantized in Bohr's atomic model​

Answer 1

Which among the following is incorrect statement?

= I think answer is (c) 4p- orbital has two radial nodes and one angular node

Answer 2

Answer:

(B) On doubling frequency of incident radiation, photocurrent is more than doubled is the incorrect statement.

Explanation:

• The photocurrent depends on the number of photons emitted.
• When we increase the intensity of the incident light, the number of photons emitted increases.
• As a result, the photocurrent increases.
• However, the photocurrent is independent of the frequency of the incident radiation.

Explanation of wrong options:

(A) Black body radiation is discontinuous but black body radiation will give a continuous spectrum.

• A blackbody emits radiation at a particular frequency and temperature.
• So, the radiation is discontinuous.
• However, the spectrum obtained is continuous at any given frequency.

(C) 4p-orbital has two radial nodes and one angular node.

• The number of radial nodes depends on the principal quantum number n and angular quantum number l.
• It is given as (n-l-1) = (4 - 1 - 1) = 2 radial nodes.
• The number of angular nodes depends on the angular quantum number l, i.e., angular nodes = l.
• Since for the p orbital l = 1, the number of angular nodes is 1.

(D) Both energy and angular momentum are quantized in Bohr's atomic model​

• In postulates of Bohr's model state the quantization condition of angular momentum.
• It may also be shown that the energy (kinetic + potential) of the electron is quantized and depends on the principal quantum number n which indicates the orbit in which the electron moves.

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