MHT CET 2020 19th October Evening Shift | Atoms and Nuclei Question 81 | Physics

The energy levels with transitions for the atom are shown. The transitions corresponding to emission of radiation of maximum and minimum wavelength are respectively

MHT CET 2020 19th October Evening Shift Physics - Atoms and Nuclei Question 38 English

B, C

A, C

C, D

A, D

MHT CET 2020 19th October Evening Shift

MCQ (Single Correct Answer)

-0

Using Bohr's model, the orbital period of electron in hydrogen atom in $n$th orbit is ( $\varepsilon_0=$ permittivity of free space, $h=$ Planck's constant, $m=$ mass of electron and $\theta=$ electronic charge)

$\frac{2 \varepsilon_0^2 n^3 h^3}{m e^4}$

$\frac{8 \varepsilon_0^2 n^3 h^3}{m e^4}$

$\frac{2 \varepsilon_0 n^2 h^2}{m e^4}$

$\frac{4 \varepsilon_0^2 n^3 h^3}{m e^4}$

MHT CET 2020 16th October Evening Shift

MCQ (Single Correct Answer)

-0

A radioactive nucleus emits $$4 \alpha$$-particles and $$7 \beta$$-particles in succession. The ratio of number of neutrons of that of protons, is [$$A=$$ mass number, $$Z=$$ atomic number]

$$\frac{A-Z-13}{Z-2}$$

$$\frac{A-Z-15}{Z-1}$$

$$\frac{A-Z-13}{Z-1}$$

$$\frac{A-Z-11}{Z-2}$$

MHT CET 2020 16th October Evening Shift

MCQ (Single Correct Answer)

-0

The ratio of energies of photons produced due to transition of electron of hydrogen atom from its (i) second to first energy level and (ii) highest energy level to second level is respectively

$$2.5: 1$$

$$3: 1$$

$$2: 1$$

$$4: 1$$

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