Two closed Identical conducting containers are found in the laboratory of an old scientist. For the verification of the gas some experiments are performed on the two boxes and the results are noted.

Experiment `1`
When the two containers are weighed `W_(A) = 225g , W_(B) = 160g` and mass of evacuated container `W_(C) = 100g`.
Experiment 2.
when the two containers are given same amount of heat same temperature rise is recorded . The pressure change found are `DeltaP_(A) = 2.5"atm"`. `" "` `DeltaP_(B) = 1.5"atm"`
Identify the gas filled in the container `A` and `B`

Options

A. `N_(2) , Ne`
B. `He, H_(2)`
C. `O_(2), Ar`
D. `Ar , O_(2)`

Answer

D

Explanation

AS `n_(A) = (5)/(3)n_(B) "so" (125)/(M_(A)) = (5)/(3)((60)/(M_(B)))`
`implies 5 M_(B) = 4M_(A) implies "Gas A " = Ar , "gas B" = O_(2)`