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The pH range ...

Question

The pH range for an acidic substance is

A

7 - 14

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B

1 - 7

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C

0 - 7

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Solution

The correct option is C 0 - 7
The standard value of an acid on a pH scale is between 0 - 7 while the substances that are basic have the value ranging between 7 - 14. For strong acids like hydrochloric acid (HCl), the value of pH is around 0 to 1.

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Question 14
The multiplicative inverse of $- 1 \frac{1}{7}$ is
(a) $\frac{8}{7}$
(b) $\frac{- 8}{7}$
(c) $\frac{7}{8}$
(d) $\frac{- 7}{8}$

Q. The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic. It is carefully regulated by a number of homeostatic mechanisms, which exert their influence principally through the respiratory system and the urinary system in order to control the acid-base balance and respiration. What is the normal pH level of blood of a normal person?

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