Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 7

MEDIUM

11th CBSE

IMPORTANT

Earn 100

Calculate the wavelength of a photon in Angstrom units having energy of one electron volt.

Important Questions on Structure of Atom

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 8

Sodium street lamp gives off a characteristic yellow light of wavelength

588 n m .

Calculate the energy per mole

(i n k J / m o l)

of these photons.

MEDIUM

11th CBSE

IMPORTANT

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

Calculate the frequency and the wavelength of the radiation in nanometers emitted when an electron in the hydrogen atom jumps from third orbit to the ground state. In which region of the electromagnetic will this line lie? (Rydberg constant

= 109,677 c m^{- 1}

)

MEDIUM

11th CBSE

IMPORTANT

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

Calculate the wavelength from the Balmer formula when

n = 3 .

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)