MCQ
Which buffer is present in human blood :-
- A$NaH_2PO_4 + Na_2HPO_4$
- B$H_3PO_4 + NaH_2PO_4$
- C$CH_3COOH + CH_3COONa$
- ✓$H_2CO_3 + HCO_3^-$
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$(I) 0.5\ mole$ of $O_3$ $(II) 0.5\ gm$ atom of oxygen $(III) 3.011 \times 10^{23}$ molecules of $O_2$ $(IV) 5.6\ litre$ of $CO_2$ at $STP$