1.

गैस के अणुओं का घनत्व `4kgm^(-3)` तथा दाब `1.2xx10^(5) Nm^(-2)` है तब अणुओं का वर्ग-माध्य वेग होगा :A. `900 ms^(-1)`B. `120 ms^(-1)`C. `600 ms^(-1)`D. `300 ms^(-1)`

Answer» Correct Answer - D
`because u_(rms) = sqrt((3P)/(d))`
` therefore u_(rms) = sqrt((3xx1.2 xx 10^(3))/(4)) = sqrt(9xx10^(4))`
` = 3 xx 10^(2) = 300 rms^(-1)`


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