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An electron in a hydrogen atom in its ground state absorbs energy equal to ionisation energy of ${Li}^{+ 2} .$ The wavelength of the emitted electron is :-

Given: Planck's constant $= 6.62 \times 10^{- 34} Js$ , mass of electron $= 9.1 \times 10^{- 31} kg$ , Ionisation energy of hydrogen ${IE}_{H} = 2.18 \times 10^{- 19} J / atom$

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Important Questions on Structure of Atom

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Beta Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>EXERCISE-2>Q 17

In compound

{FeCl}_{2}

the orbital angular momentum of last electron in its cation

&

magnetic moment (in Bohr) Magneton) of this compound are :-

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Beta Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>EXERCISE-2>Q 18

An electron, a proton and an alpha particle have kinetic energy of

16 E, 4 E

and

E

respectively. What is the qualitative order of their de Broglie wavelengths :-

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Beta Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>EXERCISE-2>Q 19

Question: Is the specie paramagnetic?

STATE - 1 :

The atomic number of specie is

29 .

STATE - 2 :

The charge on the specie is

+ 1 .

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Beta Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>EXERCISE-2>Q 23

The quantum numbers of four electrons (

e 1

e 4

) are given below :-

	$n$	$l$	$m$	$s$
$e 1$	$3$	$0$	$0$	$+ 1 / 2$
$e 2$	$4$	$0$	$1$	$1 / 2$
$e 3$	$3$	$2$	$2$	$- 1 / 2$
$e 4$	$3$	$1$	$- 1$	$1 / 2$

The correct order of decreasing energy of these electrons is :

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Beta Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>EXERCISE-2>Q 26

If the nitrogen atom had electronic configuration

1 s^{7},

it would have energy lower that of normal ground state configuration

1 s^{2} 2 s^{2} 2 p^{3},

because the electrons would be closer to the nucleus. Yet

1 s^{7}

is not observed because it violates :-

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Beta Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>EXERCISE-2>Q 29

Consider the following nuclear reactions involving $X & Y .$

$X ⟶ Y + {}_{2}^{4}{He}$

$Y ⟶ {{}_{8}O}^{18} + {{}_{1}H}^{1}$

If both neutrons as well as protons in both the sides are conserved in nuclear reaction then identify period number of $X &$ moles of neutrons in $4.6 g$ of $X$

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Beta Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>EXERCISE-2>Q 30

Electromagnetic radiations having

λ = 310 Å

are subjected to a metal sheet having work function

= 12.8 eV .

What will be the velocity of photoelectrons with maximum Kinetic Energy....

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Beta Question Bank for Engineering: Chemistry>Chapter 2 - Structure of Atom>EXERCISE-2>Q 34

A hydrogen - like atom has ground state binding energy

122.4 eV .

Then :

An electron in a hydrogen atom in its ground state absorbs energy equal to ionisation energy of Li+2. The wavelength of the emitted electron is :- Given: Planck's constant =6.62×10-34Js, mass of electron =9.1×10-31kg, Ionisation energy of hydrogen IEH=2.18×10-19J/atom

Important Questions on Structure of Atom

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