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NIKITA PUBLICATION-ATOMS, MOLECULES AND NUCLEI-MCQs
- An X-ray tube operated at 30 kV emits a continuous X-ray of short wave...
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- The wavelength of K(alpha) X-rays produced by an X-ray tube is 1.785 Å...
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- Which of the following is accompanied by the characteristic X - ray em...
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- For continuous X-rays produced wavelength is
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- The speed of the electron in the second orbit in a H-atom is
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- The velocity of the electron in the first Bohr's orbit is 2.181xx10^(6...
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- The angular momentum of the electron in the third orbit of H atom is
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- The angular speed of the electron in the first orbit in a hydrogen ato...
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- The angular speed of the electron in the first orbit in a H atom is 4....
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- The radius of the first Bohr orbit of the hydrogen atom is 0.53 Å and ...
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- The radius of first Bohr orbit in H-atom is 0.53 Å. The radius of thir...
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- The energy of the electron in the third orbit of H-atom is -1.51 eV. T...
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- Energy of an electron in second Bohr orbit of H-atom is -3.4 eV. The R...
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- If an electron in hydrogen atom jumps from third orbit to second orbit...
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- The wavelength of H(alpha) line in Balmer series is
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- The shortest wavelength of spectral line in Lyman series is 912 Å. The...
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- The shortest wavelength of spectral line in Lyman series is 912 Å. The...
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- The ratio of the longest to the shortest wavelength lines in the Balme...
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- A radioactive substance reduces to 1/32 of its original value in 300 d...
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- A radioactive substance decay to 1/5 of its original value in 56 days....
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