A) Become double of 740 mm.
B) Become half of 740 mm.
C) Become 1/9 of 740 mm.
D) Remains unchanged.
Correct Answer: B
Solution :
[b] \[{{p}_{tot}}=740\,mm\] \[{{p}_{tot}}={{p}_{O}}_{_{2}}+{{p}_{{{H}_{2}}}}\] Number of moles of \[{{O}_{2}}\] and \[{{H}_{2}}\] are equal \[\therefore \] \[{{p}_{{{o}_{2}}}}={{p}_{{{H}_{2}}}}\] \[\therefore \] \[{{p}_{{{o}_{2}}}}+{{p}_{{{H}_{2}}}}=740\] \[{{p}_{{{o}_{2}}}}=370mm={{p}_{{{H}_{2}}}}\]
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