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The colour of the positive column ina gas discharge tube depends on

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The colour of the positive column ina gas discharge tube depends on
A. natruue of gas in the discharge tube
B. potential difference between cathode and anode
C. natrue of material of cathode
D. nature of glass of the discharge tube
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Correct Answer - D
In the discharge tube, a fluorescent glow is seen on the glass opposite to the type of glass, it being yellowish-green for soda glass.
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