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e/m ratio of the canal rays is less than that of cathode rays. The reason is

A. greater mass of canal ray particles
B. greater charge of the canal ray particles
C. greater mass and charge of the canal ray particles
D. actually e/m ratio of canal rays is greater than that of the cathode rays

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Correct Answer: A. greater mass of canal ray particles
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Roentgen discovered X-rays and Mosley found that the frequency of the X-rays emitted from anode increases with the

A. increase in the mass number of the metal used as anode
B. decrease in the mass number of the metal used as anode
C. decrease in the proton number of the metal used as anode
D. increase in the proton number of the metal used as anode

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Correct Answer: D. increase in the proton number of the metal used as anode
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Second ionization energy

A. is always less than first ionization energy
B. is always greater than first ionization energy
C. is equal to the first ionization energy
D. may be greater or less than the first ionization energy depending on the nature of the element

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Correct Answer: B. is always greater than first ionization energy
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