The relationship between energy E, of the radiation with a wavelength 8000 A and the energy of the radiation with a wavelength 16000 A is 

1. E1 = 6E2

2. E1 = 2E2

3. E1 = 4E2

4. E1 = 1/2E2

Concept Questions :-

EMT Radiation
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The tranistion of electrons in H atom that will emit maximum energy is:

1. n3  n2

2. n4  n3

3. n5  n4

4. n6  n5

Concept Questions :-

Hydrogen Spectra
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The transition in He+ ion in balmer series that would have the same wave number as the first Lyman line in the hydrogen spectrum is:

1. 2 1

2. 5 3

3. 4 2

4. 6 4

 

Concept Questions :-

Hydrogen Spectra
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If the speed of electron in Bohr's first orbit of hydrogen atom be x, then speed of the electron in 3rd orbit is:

1. x/9

2. x/3

3. 3x

4. 9x

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In Bohr's model of the hydrogen atom the ratio between the period of revolution of an electron in the orbit n=1 to the period of revolution of the electron in the orbit n=2 is

1. 1:2

2. 2:1

3. 1:4

4. 1:8

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A cricket ball of 0.5 kg is moving with a velocity of 100 ms-1. The wavelength associated with its motion is:

1. 1/100cm

2. 6.6 x 10-34m

3. 1.32 x 10-35m

4. 6.6 x 10-28m

Concept Questions :-

de Broglie Equation
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How many electrons in 19K have n=3; l=0?

1. 1

2. 2

3. 4

4. 3

Concept Questions :-

Number of E/P/N
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The ratio of the difference in energy between the first and second Bohr orbit to that between the second and the third Bohr orbit is 

1. 1/2

2. 1/3

3. 4/9

4. 27/5

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How many numbers of orbitals are possible in L-energy level?

(1) 2

(2) 4

(3) 6

(4) 1

Concept Questions :-

Quantum Numbers
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The radius of second stationary orbit in Bohr's atom is R. The radius of 3rd orbit will be:-

1. 9R

2. R/4

3. 9R/4

4. 2R

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