A) 2 : 7
B) 7 : 2
C) 6 : 2
D) 1 : 1
Correct Answer: D
Solution :
Key Idea: Average molecular kinetic energy \[=\frac{3}{2}\,kT\] Given, T = 300 K for both \[U{{F}_{2}}\] and \[{{H}_{2}}\]. \[\therefore \] Average molecular kinetic energy does not depend on molecular mass of substance. Average molecular kinetic energy of \[{{H}_{2}}\] \[=\frac{3}{2}k\times 300\] ... (i) Average molecular kinetic energy of UI^ \[=\frac{3}{2}k\times 300\] ... (ii) Dividing Eq. (i) by Eq. (ii) we get 1:1
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