Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 42

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11th CBSE

IMPORTANT

Earn 100

Calculate the wavelength (in nanometer) associated with a proton moving at $1.0 x 10^{3} m s^{- 1} .$

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Important Questions on Structure of Atom

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 43

If the de Broglie wavelength of a particle of mass

m

is

100

times its velocity, then its value in terms of its mass

(m)

and Planck's constant

(h)

is

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 44

How fast is an electron moving if it has a wavelength equal to the distance it travels in one second?

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 45

If the radius of the first Bohr orbit is

x

, then de Broglie wavelength of electron in

3 rd

orbit is nearly

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 46

The de-Broglie wavelength associated with a ball of mass

1 kg

having kinetic energy

0.5 J

is

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 47

In an atom, an electron is moving with a speed of

600 m / s

is with an accuracy of

0.005 %

. Certainty with which the position of the electron can be located is

(h = 6.6 x 10^{- 34} kg m^{2} s^{- 1},

mass of electron,

m_{e} = 9.1 x 10^{- 31} kg)

.

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 48

A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference of

V esu

. If

e

and

m

are charge and mass of the electron respectively, then the value of

\frac{h}{λ}

( where

λ

is the wavelength associated with the electron wave) is given by

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 49

The electrons occupying the same orbital are distinguished by

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11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 50

The total number of atomic orbitals in fourth energy level of an atom is