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

MEDIUM

11th CBSE

IMPORTANT

Earn 100

A monoatomic anion of unit charge contains $45$ neutrons and $36$ electrons. Find the atomic number, mass number of the ion with its identification.

Important Questions on Structure of Atom

MEDIUM

11th CBSE

IMPORTANT

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

Calculate the frequency of infrared radiations having wavelength,

3 \times 10^{6} n m .

HARD

11th CBSE

IMPORTANT

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

Calculate the range of frequencies of visible light from

3800 - 7600 Å .

HARD

11th CBSE

IMPORTANT

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

How long would it take a radio wave of frequency,

6 \times 10^{3} \sec^{- 1}

to travel from Mars to the Earth, a distance of

8 \times 10^{7} k m ?

MEDIUM

11th CBSE

IMPORTANT

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

Calculate the wave number of radiations having a frequency of

4 \times 10^{14} H z .

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 5

A particular radio station broadcasts at a frequency of

1120 k H z (k i l o h e r t z) .

Another radio station broadcasts at a frequency of

98.7 M H z (M e g a h e r t z) .

What are the wavelengths of the radiations from each station?

HARD

11th CBSE

IMPORTANT

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

Which has a higher energy: a photon of red light with a wavelength of

7500 Å

or a photon of green light with a wavelength of

5250 Å ?

MEDIUM

11th CBSE

IMPORTANT

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

In the ultraviolet region of the atomic spectrum of hydrogen, a line is obtained at

1026 Å .

Calculate the energy of photon of this wavelength

(h = 6.626 \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

In the infrared region of the atomic spectrum of hydrogen, a line is obtained at

3802 c m^{- 1} .

Calculate the energy of this photon

(h = 6.626 \times 10^{- 34} J s) .