The Lyman series corresponds to the emission lines of hydrogen atom due to the transitions of the type n → 1 ( 2 → 1 , 3 → 1 , 4 → 1 , etc ) where n is the principal quantum number of the excited state. The ionization energy of the hydrogen atom can be determined by plotting:

Frequency differences between successive emission lines vs emission frequencies

Frequency differences between successive emission lines vs n

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The frequency of oscillation of the electric field vector of a certain electromagnetic.wave is $5 \times 10^{14}$ Hz. What is the frequency of oscillation of the corresponding magnetic field vector and to which part of the electromagnetic spectrum does it belong?

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Important Questions on Structure of Atom

EASY

Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The energy of the em waves is of the order of

15 keV

. To which part of the spectrum does it belong?

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The Lyman series corresponds to the emission lines of hydrogen atom due to the transitions of the type

n \to 1 (2 \to 1, 3 \to 1, 4 \to 1

, etc ) where

n

is the principal quantum number of the excited state. The ionization energy of the hydrogen atom can be determined by plotting:

EASY

Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The number of following statement/s which is/are incorrect is ______

A) Line emission spectra are used to study the electronic structure

B) The emission spectra of atoms in the gas phase show a continuous spread of wavelength from red to violet.

C) An absorption spectrum is like the photographic negative of an emission spectrum

D) The element helium was discovered in the sun by spectroscopic method

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The E.M. wave with shortest wavelength among the following is

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The ratio of the highest to the lowest wavelength of Lyman series is

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

An electromagnetic radiation is used for photography in fog.
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose?

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

Which of the following is correct?

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

Which mode of propagation is used by short wave broadcast services ?

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The spectrum of Helium is expected to be similar to that of____

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The product obtained after positron emission from

{}_{31}{Ga}^{68}

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

Consider the following
(i) Submarine communications
(ii) A.M. radio
(iii) Shortwave ratio
(iv) Radar

Arrange the above in increasing frequency of the waves associated with them

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The correct representation of wavelength intensity relationship of an ideal black body radiation at two different temperatures

T_{1}

and

T_{2}

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

The speed of

X

-rays is the same as that of visible light. Hence its wavelength is

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

A carrot looks orange in colour because of the

β

carotene molecule in it. This means that the

β

carotene molecule absorbs light of wavelengths,

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

Why are infra-red waves often called heat waves ? Explain.

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

Name the electromagnetic radiations used for eye surgery.

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

Which one of the following has the highest wavelength?

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

78) There are two statements, one labelled as Assertion (A) and the other as Reason (R). Examine both the statements carefully and mark the correct choice.
(A) Hydrogen has one electron in its orbit but it produces several spectral lines.
(R) There are many excited energy levels available.

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Spectra

Which of the following statements is false?

The frequency of oscillation of the electric field vector of a certain electromagnetic.wave is 5×1014 Hz. What is the frequency of oscillation of the corresponding magnetic field vector and to which part of the electromagnetic spectrum does it belong?

Important Questions on Structure of Atom

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The frequency of oscillation of the electric field vector of a certain electromagnetic.wave is $5 \times 10^{14}$ Hz. What is the frequency of oscillation of the corresponding magnetic field vector and to which part of the electromagnetic spectrum does it belong?