The approximate pH value of blood (weak base) is :

7.15

7.25

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7.35

7.45

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7.55

7.65

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none of the above

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Solution

The correct option is B $7.35$ to $7.45$
The approximate pH value of blood ranges from 7.35 to 7.45. Thus, it means that blood is slightly basic in nature/ weak base.
If the blood pH falls below 7.35 then the condition is known as acidosis and if the blood pH rises above 7.45 then the condition is known as alkalosis.
Thus, the correct answer is option (B).

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