At what temperature is the root mean square velocity of gaseous hyd...

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At what temperature is the root mean square velocity of gaseous hydrogen molecules equal to that of oxygen
\( \mathrm{P} \) molecules at \( 47^{\circ} \mathrm{C} \) [CPMT 1985; MP PET 1997; RPET 1999;

W
AIEEE 2002; Similar MP PMT 1992; Kerala PET 2010]
(a) \( 20 \mathrm{~K} \)
(b) \( 80 \mathrm{~K} \)
(c) \( -73 \mathrm{~K} \)
(d) \( 3 K \)
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