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Question

The circulation of blood in human body supplies O2 and releases CO2. The concentration of O2 and CO2 is variable but on an average, 100 mL blood contains 0.02 g of O2 and 0.08 g of CO2. The volume of O2 and CO2 at 1 atm and at body temperature 37 C, assuming 10 L blood in human body, is

A
2 L,4 L
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B
1.5 L,4.5 L
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C
1.59 L,4.62 L
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D
3.82 L,4.62 L
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Solution

The correct option is C 1.59 L,4.62 L
100 mL of blood has 0.02 g of O2 and 0.08 g of CO2.
10,000 mL blood has 2 g of O2 and 8 g of CO2
By using PV=nRT,
For O2, 1×VO2=232×0.0821×310
VO2=1.59 litres
For CO2, 1×VCO2=844×0.0821×310
VCO2=4.62 litres
Thus, the correct option is (c).

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