What percentage of $O_2$ is transported by hemoglobin (in $\%$)?

State the different modes of $CO_{2}$ transport in blood.

$A$: Major part of carbon dioxide is transported in the form of sodium bicarbonate.
$R$: $0.3 \; ml$ of carbon dioxide is transported per $100 \; ml$ of blood in dissolved state in plasma of blood.

Although a large amount of $CO_2$ is transported in the blood,the blood does not become acidic because:

The process by which chloride ions pass into $R.B.C.$ and bicarbonate ions pass out is called

The oxygen dissociation curve of hemoglobin is . . . . . . .