Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 2

MEDIUM

11th CBSE

IMPORTANT

Earn 100

Calculate the wavelength from the Balmer formula when $n = 3 .$

Important Questions on Structure of Atom

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 3

Calculate the wavelength of the spectral line in Lyman series corresponding to

n_{2} = 3 .

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 1

If the energy difference between two electronic states is

214.68 k J m o l^{- 1},

calculate the frequency of light emitted when an electron drops from the higher to the lower state. Planck’s constant,

h = 39.79 \times 10^{- 14} k J \sec m o l^{- 1} .

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 2

In hydrogen atom, an electron jumps from

3^{r d}

orbit to the

2^{n d}

orbit. Calculate the wavelength of the radiation emitted.

(h = 6.63 \times 10^{- 34} J s e c) .

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 3

Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 4

Applying Bohr’s model when electron in

H

atom comes from

n = 4

to

n = 2,

calculate the wavelength of the line. In this process, write whether energy is released or absorbed. Also write the range of radiation

(R_{H} = 2.18 \times 10^{- 18} J, h = 6.63 \times 10^{- 34} J)

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 1

Calculate the momentum of a particle which has a de Broglie wavelength of

1 Å

or

0.1 n m . (h = 6.6 \times 10^{- 34} k g m^{2} s^{- 1}) .

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 2

Calculate the wavelength of an electron moving at

3.0 \times 10^{10} c m \sec^{- 1} (m a s s of t h e e l e c t r o n = 9.11 \times 10^{- 31} k g, h = 6.6 \times 10^{- 34} k g m^{2} s e c^{- 1}) .

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 3

The kinetic energy of an electron is

5 \times 10^{- 5} e V

(electron volts). Calculate the wavelength of the wave associated with the electron. The mass of the electron may be taken as

10^{- 30} k g .