The number of air molecules per cm³ increased from 3×10¹⁹ to 12×1… | JEE Main 2023 Physics PYQ

MCQEasyJEE Main 2023 · 6 April, Shift 1Mean Free Path & Avogadro's Number

The number of air molecules per cm³ increased from $3\times10^{19}$ to $12\times10^{19}$ . The ratio of collision frequency of air molecules before and after the increase is:

A
$0.25$
B
$0.75$
C
$1.25$
D
$0.50$

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