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B
0.7
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C
1.45
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D
1.62
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Solution
The correct option is B 0.7 The ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration is called the respiratory quotient (RQ) or respiratory ratio. RQ=VolumeofCO2evolvedVolumeofO2consumed
Here, RQ = 204290=0.703