A) 0.76cm
B) 0.70 cm
C) 7.4 cm
D) 76 cm
Correct Answer: C
Solution :
\[p=0.0072\,\text{atm}\] \[=0.0072\times 76\,\text{cm}\,\text{of}\,\text{Hg}\] \[=0.0072\times 76\times 13.6\,\text{cm}\]of mercury column Also, \[p=h\times 1\,cm\]of water column \[\therefore \] \[h\times 1=0.0072\times 76\times 13.6\,\text{cm}\] or \[h=7.4\,cm\]
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