The energy required to break a chemical bond is 3.313 × 10⁻¹² erg. Calculate the wavelength of the radiation (in cm) that can break this bond.
[Given: Speed of light, c = 3.00 × 10¹⁰ cm s⁻¹; Planck’s constant, h = 6.626 × 10⁻²⁷ erg s]

1. \(5.00 \times 10^{-4} \mathrm {cm}\) 
2. \(1.00 \times 10^{-5}\mathrm {cm}\)
3. \(2.00 \times 10^{-5} \mathrm {cm}\)
4. \(6.00 \times 10^{-5}\mathrm {cm}\)

 
Subtopic:  Planck's Theory |
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Level 1: 80%+
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The de Broglie wavelength of an electron and a neutron become equal when the velocity of the electron is x times the velocity of the neutron. The value of x is:

[Given: Mass of electron is \(9.1 \times 10^{-31} \text {kg}\) and mass of neutron is \( 1.6 \times 10^{-27} \mathrm{~kg} \)]

1. 1758
2. 3054
3. 1239
4. 6215
Subtopic:  Planck's Theory |
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Level 2: 60%+
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