The circumference of the Bohr orbit for the H atom is related to the de Broglie wavelength associated with the electron revolving around the orbit by which of the following relation?

1. 2πr=
2. πr = 2
3. mvr = 
4. vr = 2

Subtopic:  Bohr's Theory | De Broglie Equation |
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 The largest de Broglie wavelength among the following (all have equal velocity) is 

1.  CO2 molecule

2.  NH3 molecule

3.  Electron

4.  Proton

Subtopic:  De Broglie Equation |
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The wavelength of an electron moving with a velocity of 2.05 × 107 m s-1  would be 

1. 4.65 × 10-12 m
2. 3.55 × 10-11 m
3. 2.34 × 1011 m
4. 6.43 × 10-11 m

Subtopic:  De Broglie Equation |
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If the velocity of the electron is 1.6 × 106 ms-1. The de Broglie wavelength associated with this electron is 

1. 590 pm2. 455 pm3. 512 pm4. 401 pm

Subtopic:  De Broglie Equation |
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The graphs that represents the variation of momentum of particle with de-Broglie wavelength is 

1.  

2.  

3.  

4.  

Subtopic:  De Broglie Equation |
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Which of the following statements is wrong?

1. The uncertainty principle is x·ph4π

2. Half-filled and fully filled orbitals have greater stability due to greater exchange energy,

greater symmetry, and a more balanced arrangement.

3. The energy of the 2s orbital is less than the energy of the 2p orbital in the case of hydrogen-like atoms.

4. De-Broglie's wavelength is given by λ=hmv, where m= mass of the particle, v = group velocity of the particle.

Subtopic:  De Broglie Equation |
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The velocity associated with a proton moving at a potential difference of 1000 V is 4.37 × 105 ms–1. If the hockey ball of mass 0.1 kg is moving with this velocity, then the wavelength associated with this velocity would be

1. 1.52 ×10-38 m2. 2.54 × 10-32 m3. 1.52 × 10-36 m4. 3.19 × 10-34 m

Subtopic:  De Broglie Equation |
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The kinetic energy of an electron is 3.0 × 10–25 J. Its wave length would be 

1. 8.96 × 10-7 m
2. 4.37 × 10-6 m
3. 1.32 × 10-7 m
4. 2.89 × 10-4 m

Subtopic:  De Broglie Equation |
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If the wavelength of a neutron is 800 pm, then the characteristic velocity associated with the neutron is

1. 494 m s-1
2. 567 m s-1
3. 494 cm s-1
4. 501 m s-1

Subtopic:  De Broglie Equation |
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