Select the most appropriate option for the pH range of acids and bases.

Base: 0 - 5 and Acid: 6 - 14

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Acid: 0 - 7 and Base: 7 - 14

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Acid: 0 - 5 and Base: 5 - 14

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Base: 0 - 7 and Acid: 7 - 14

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Solution

The correct option is B Acid: 0 - 7 and Base: 7 - 14
The strength of acidic and basic substances is measured with respect to pH scale. 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 the strong acids like HCl, the value of pH is around 0 to 1. For weaker base like ammonia, the pH is about 11.

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