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Question

Which of the following is acidic in nature?


A

Human Blood

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B

Lime juice

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C

Lime water

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D

Antacid

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Solution

The correct option is B

Lime juice


The explanation for the correct option

B. Lime juice

  1. An acidic substance is one that has a pH value between 0 to 7 while a basic substance has a pH value between 7 to 14 at 25 degrees Celcius.
  2. Also, acidic substances have the tendency to donate the protons (H+) and basic substances have the tendency to donate the hydroxide ions (OH-).
  3. Limes are acidic in nature due to the presence of citric acid and their pH is around 2-3.
  4. Thus, lime juice is acidic in nature.

The explanation for the incorrect options:

A. Human blood is slightly basic in nature.

C. Lime water is calcium hydroxide (Ca(OH)2) and it is basic in nature.

D. Antacids are taken to treat acidity and thus neutralize acids of the stomach, thus the nature of antacids should be basic.

Hence, the correct option is B, Lime juice.


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