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Earn 100

Find the quantum number of the excited state of electrons in ${He}^{+}$ ion which on the transition to the first excited state emits photons of wavelengths $108.5 nm$ . ( $R_{H} = 1.9678 \times 10^{7} m^{- 1}$ )

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Important Questions on Structure of Atom

HARD

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-1>Q 97

For a

3 s

orbital

ψ (3 s) = \frac{1}{9 \sqrt{3}} {(\frac{1}{a_{0}})}^{1 / 2} (6 - 6 σ + σ^{2}) ψ^{- σ / 2}

Where

σ = \frac{2 Zr}{3 a_{0}}

. What is the maximum radial distance of node from nucleus?

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-1>Q 98

A glow-worm of mass

5.0 g

emits red light

(650 nm)

with a power of

0.10 w

entirely in the backward direction. To what speed will it have accelerated after

10

year if released into free space and assumed to live?

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JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-1>Q 99

Calculate the energy required to excited one liter of hydrogen gas at

1 atm

and

298 K

to the first excited state of atomic hydrogen. The energy for the dissociation of

H - H

bond is

436 kJ {mol}^{- 1}

. Also calculate the minimum frequency of photon break this bond.

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-1>Q 100

O_{2}

undergoes photochemical dissociation into

1

a normal oxygen atom

(O)

and a more energetic oxygen atom

O *

. If

(O)

has

1.967 eV

more energy than

(O)

and normal dissociation energy of

O_{2}

498 kJ {mol}^{- 1}

, what is the maximum wavelength effective for the photochemical dissociation of

O_{2}

MEDIUM

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-1>Q 101

If the subsidiary quantum number of a sub-energy level is

4

, the maximum and minimum values of the spin multiplicities are:

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Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-1>Q 102

1 mol

{He}^{+}

ion is excited. Spectral analysis showed existence of

50 %

ions in

3 rd

level,

25 %

2 nd

level and remaining

25 %

in ground state. Ionization energy of

{He}^{+}

54.4 eV

; calculate total energy evolved when all the ions return to the ground state.

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JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-1>Q 103

Consider the following six electronic configurations (remaining inner orbits are completely filled) and mark the correct option.
(I)
Question Image
(II)

(III)

(IV)

(V)

(VI)

Question Image

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IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>Exercise-1>Q 104

Choose the correct statement(s):

Find the quantum number of the excited state of electrons in He+ ion which on the transition to the first excited state emits photons of wavelengths 108.5 nm. (RH=1.9678×107 m-1)

Important Questions on Structure of Atom

Learn and Prepare for any exam you want !

Find the quantum number of the excited state of electrons in ${He}^{+}$ ion which on the transition to the first excited state emits photons of wavelengths $108.5 nm$ . ( $R_{H} = 1.9678 \times 10^{7} m^{- 1}$ )