Test: Developments leading to Bohr's Model of Atom

Question 1

What will be the wavenumber of yellow radiation having wavelength 240 nm?

Accepted Answer

4.16 x 10⁶ m^-1

Answer

1.724 x 10⁴ cm^-1

Answer

4 x 10¹⁴Hz

Answer

219.3 x 10³ cm^-1

Question 2

What will be the energy of one photon of radiation whose frequency is 5 × 10¹⁴ Hz?

Accepted Answer

3.3 x 10^-19J

Answer

199.51J

Answer

6.626 x 10^-34 J

Answer

2.31 x 10⁵ J

Question 3

The energy of a photon is given as 3.03 x 10^-19 J/atom. The wavelength of the photon is

Accepted Answer

656 nm

Answer

6.56 nm

Answer

65.6 nm

Answer

0.656 nm

Question 4

What will be the energy of a photon which corresponds to the wavelength of 0.50 Å?

Accepted Answer

3.98 x 10^-15 J

Answer

3 x 10¹⁵J

Answer

3.9 x 10⁸ J

Answer

3 x 10^-34 J

Question 5

Compare the energies of two radiations E₁ with wavelength 800 nm and E₂ with wavelength 400 nm.

Accepted Answer

E₂ = 2E₁

Answer

E₁ = 2E₂

Answer

E₁ = E₂

Answer

Question 6

Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. What is the ionisation energy of sodium per atom?

Accepted Answer

8.214 x 10^-19 J/atom

Answer

494.5 x 10^-6 J/atom

Answer

8169.5 x 10^-10 J/atom

Answer

5.85 x 10^-15 J/atom

Question 7

The energy difference between the ground state of an atom and its excited state is 3 x 10^-19 J. What is the wavelength of the photon required for this transition?

Accepted Answer

6.6 x 10^-7 m

Answer

6.6 x 10^-34 m

Answer

3 x 10-8 m

Answer

1.8 x 10^-7 m

Question 8

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

Accepted Answer

2 x 10²⁰ s^-1

Answer

3 x 10²⁰ s^-1

Answer

2 x 10^-20 s^-1

Answer

1 x 10^-20 s^-1

Question 9

Mark the incorrect statement regarding the photoelectric effect.

Accepted Answer

The number of electrons ejected is inversely proportional to the intensity of light

Answer

There is no time lag between the striking of light beam and the ejection of electrons from the metal surface

Answer

Photoelectric effect is not observed below threshold frequency

Answer

The kinetic energy of the electrons increases with increase in frequency of light used

Question 10

A certain metal when irradiated by light (v = 3.2 x 10¹⁶ Hz) emits photoelectrons with twice K.E. as did photoelectrons when the same metal is irradiated by light (v = 2.0 x 10¹⁶ Hz). The v₀ of the metal is

Accepted Answer

8 x 10¹⁵ Hz

Answer

1.2 x 10¹⁴Hz

Answer

1.2 x 10¹⁶ Hz

Answer

4 x 10¹² Hz

Question 11

The spectrum of white light ranging from red to violet is called a continuous spectrum because

Accepted Answer

The violet colour merges into blue, blue into green, green into yellow and so on

Answer

Different colours are seen as different bands in the spectrum

Answer

The colours continuously absorb energy to form a spectrum

Answer

It is a continuous band of coloured and white light separating them

Question 12

The emission spectrum of hydrogen is found to satisfy the expression for the energy change ΔE (in joules) such that where n₁ = 1, 2, 3,.... and n₂ = 2, 3, 4. The spectral lines corresponds to Paschen series if

Accepted Answer

n₁ = 3 and n₂ = 4, 5, 6

Answer

n₁ = 1 and n₂ = 2, 3, 4

Answer

n₁ = 1 and n₂ = 3, 4, 5

Answer

n₁ = 2 and n₂ = 3, 4, 5

Question 13

The wavelength of visible light is

Accepted Answer

380 nm - 760 nm

Answer

200 nm - 370 nm

Answer

780 nm - 890 nm

Answer

900 nm - 2000 nm

Question 14

Which of the following types of spectrum is best depicted by the given figure?

Accepted Answer

Atomic emission spectra

Answer

Atomic absorption spectra

Answer

Continuous spectra

Answer

None of these

Question 15

Match the constants given in column I with their values given in column II and mark the appropriate, choice.

Accepted Answer

(A)→(iv), (B)→(i), (C)→(ii), (D)→(iii)

Answer

(A)→(iii), (B)→(ii), (C)→(i), (D)→(iv)

Answer

(A)→(ii), (B)→(iv), (C)→(i), (D)→(iii)

Answer

(A)→(i), (B)→(iii), (C)→(iv), (D)→(ii)

Developments leading to Bohr's Model of Atom - Free MCQ Practice Test

MCQ Practice Test & Solutions: Test: Developments leading to Bohr's Model of Atom (15 Questions)

What will be the wavenumber of yellow radiation having wavelength 240 nm?

What will be the energy of one photon of radiation whose frequency is 5 × 10¹⁴ Hz?

The energy of a photon is given as 3.03 x 10^-19 J/atom. The wavelength of the photon is

What will be the energy of a photon which corresponds to the wavelength of 0.50 Å?

Compare the energies of two radiations E₁ with wavelength 800 nm and E₂ with wavelength 400 nm.

Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. What is the ionisation energy of sodium per atom?

The energy difference between the ground state of an atom and its excited state is 3 x 10^-19 J. What is the wavelength of the photon required for this transition?

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

Mark the incorrect statement regarding the photoelectric effect.

A certain metal when irradiated by light (v = 3.2 x 10¹⁶ Hz) emits photoelectrons with twice K.E. as did photoelectrons when the same metal is irradiated by light (v = 2.0 x 10¹⁶ Hz). The v₀ of the metal is

The spectrum of white light ranging from red to violet is called a continuous spectrum because

The emission spectrum of hydrogen is found to satisfy the expression for the energy change ΔE (in joules) such that where n₁ = 1, 2, 3,.... and n₂ = 2, 3, 4. The spectral lines corresponds to Paschen series if

The wavelength of visible light is

Which of the following types of spectrum is best depicted by the given figure?

Match the constants given in column I with their values given in column II and mark the appropriate, choice.

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Developments leading to Bohr's Model of Atom - Free MCQ Practice Test

MCQ Practice Test & Solutions: Test: Developments leading to Bohr's Model of Atom (15 Questions)

What will be the wavenumber of yellow radiation having wavelength 240 nm?

What will be the energy of one photon of radiation whose frequency is 5 × 1014 Hz?

The energy of a photon is given as 3.03 x 10-19 J/atom. The wavelength of the photon is

What will be the energy of a photon which corresponds to the wavelength of 0.50 Å?

Compare the energies of two radiations E1 with wavelength 800 nm and E2 with wavelength 400 nm.

Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. What is the ionisation energy of sodium per atom?

The energy difference between the ground state of an atom and its excited state is 3 x 10-19 J. What is the wavelength of the photon required for this transition?

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

Mark the incorrect statement regarding the photoelectric effect.

A certain metal when irradiated by light (v = 3.2 x 1016 Hz) emits photoelectrons with twice K.E. as did photoelectrons when the same metal is irradiated by light (v = 2.0 x 1016 Hz). The v0 of the metal is

The spectrum of white light ranging from red to violet is called a continuous spectrum because

The emission spectrum of hydrogen is found to satisfy the expression for the energy change ΔE (in joules) such that where n1 = 1, 2, 3,.... and n2 = 2, 3, 4. The spectral lines corresponds to Paschen series if

The wavelength of visible light is

Which of the following types of spectrum is best depicted by the given figure?

Match the constants given in column I with their values given in column II and mark the appropriate, choice.

NCERT Based Tests for NEET

NCERT Based Tests for NEET

Top Courses for NEET

About this NEET Practice Test

Explore more NEET Study Resources

What will be the energy of one photon of radiation whose frequency is 5 × 10¹⁴ Hz?

The energy of a photon is given as 3.03 x 10^-19 J/atom. The wavelength of the photon is

Compare the energies of two radiations E₁ with wavelength 800 nm and E₂ with wavelength 400 nm.

The energy difference between the ground state of an atom and its excited state is 3 x 10^-19 J. What is the wavelength of the photon required for this transition?

A certain metal when irradiated by light (v = 3.2 x 10¹⁶ Hz) emits photoelectrons with twice K.E. as did photoelectrons when the same metal is irradiated by light (v = 2.0 x 10¹⁶ Hz). The v₀ of the metal is

The emission spectrum of hydrogen is found to satisfy the expression for the energy change ΔE (in joules) such that where n₁ = 1, 2, 3,.... and n₂ = 2, 3, 4. The spectral lines corresponds to Paschen series if