A) 0.5atm
B) 1atm
C) 0.75atm
D) 0.125atm
Correct Answer: D
Solution :
No. of moles in mixture is the sum of separate no. of moles of gases. \[\because \] \[n={{n}_{1}}+{{n}_{2}}\] or \[\frac{pV}{RT}=\frac{{{p}_{2}}{{V}_{1}}}{RT}+\frac{{{p}_{2}}{{V}_{1}}}{RT}\] or \[p\times 1000=1\times 100+0.5\times 50\] \[\Rightarrow \] \[p=0.125\,\,atm\]
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