At what temperature, hydrogen molecules will have same average speed as nitrogen molecules at 470C?
A
32.2K
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B
50K
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C
22.86K
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D
14.84K
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Solution
The correct option is B22.86K Average speed for gaseous molecule. Cavg=√SRTπM For N2 , (Cavg)N2 = √SRTM2πMN2 For H2 , (Cavg)H2 = √SRTH2πMH2 as (Cavg)M2 = (Cavg)H2 (given) √TM2MM2=√TH2MH2