JEE Main 2020 Physics question
Two gases-argon (atomic radius 0.07 nm, atomic weight 40) and xenon (atomic radius 0.1 nm, atomic weight 140) have the same number density and are at the same temperature. The ratio of their respective mean free times is closest to -
Answer: (D)
Solution
The paper prints [3] (1.83) as its key and gives the NTA answer key as (4) 3.67;
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