A) \[72\,\,kg\]
B) \[46\,\,kg\]
C) \[50\,\,kg\]
D) \[64\,\,kg\]
Correct Answer: D
Solution :
The oxygen obtained from \[72\,\,kg\] of water is obtained by the following equation. \[\underset{\begin{smallmatrix} 2(2+16) \\ \,\,\,\,\,\,=36 \end{smallmatrix}}{\mathop{2{{H}_{2}}O}}\,\xrightarrow{{}}\underset{\begin{smallmatrix} (2\times 16) \\ \,\,\,\,=32 \end{smallmatrix}}{\mathop{2{{H}_{2}}+{{O}_{2}}}}\,\] Therefore, \[36\,\,kg\] of water produce \[32\,\,g\] of oxygen. Hence, \[72\,\,kg\] of water produce oxygen \[=\frac{32\times 72}{36}=64\,\,kg\]
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