A) \[{{O}^{12}}\]
B) \[{{O}^{16}}\]
C) \[{{O}^{18}}\]
D) \[{{O}^{15}}\]
Correct Answer: B
Solution :
Ruben ad Kamen used isotopes of oxygen in water, i.e., \[{{H}_{2}}{{O}^{18}}\] instead of \[{{H}_{2}}O\] (normal) and noticed that librated oxygen contains\[{{O}^{18}}\]of water and not of\[C{{O}_{2}}\] \[6C{{O}_{2}}+12{{H}_{2}}{{O}^{18}}\underset{\text{Chalorophyll}}{\mathop{\xrightarrow{\text{Light}}}}\,{{C}_{6}}{{H}_{12}}{{O}_{6}}+6O_{2}^{18}+6{{H}_{2}}O\]
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