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Question

The nature of ions knocked out from the hot surfaces is

A
nuclei
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B
neutrons
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C
electrons
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D
protons
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Solution

The correct option is C electrons
Ions are atoms or molecules with a net electric charge due to the loss or gain of one or more electrons leading to respective positive or negative electric charge. Also protons and neutrons are held within the nucleus by strong interaction and its not possible to remove them from the atomic configuration. The ions which are knocked out from hot surfaces are electrons.

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