Answer

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300 K900 K4800 K1200 K

Solution :

(c ) `U_(rms)("velocity")=sqrt((3RT)/(M))` <br> Hence, `upropsqrttrArr(u_(1))/(u_(2))=sqrt((T_(1))/(T_(2)))` From Eq. (i), `(1)/(4)=sqrt((300)/(T_(2)))` <br> `(1)/(16)=(300)/(T_(2))` <br> `T^(2)=16xx300` <br> 4800 K