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A sample of soil is mixed with water and...

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue ?

A

Lemon juice

B

Vinegar

C

Common salt

D

An antacid

Text Solution

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The correct Answer is:
D
The colour of the pH paper signifies that the solution is somewhat acidic. In order to change it to greenish-blue, we need an antacid.
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DINESH PUBLICATION-ACIDS, BASES AND SALTS -MULTIPLE CHOICE QUESTIONS
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  2. Calcium phosphate is present in tooth enamel. Its nature is

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  3. A sample of soil is mixed with water and allowed to settle. The clear ...

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  4. Which of the following gives the correct increasing order of acidic st...

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  5. If a few drops of a concentrated acid accidentally spill over the hand...

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  6. Sodium hydrogen carbonate when added to acetic acid evolves a gas. Whi...

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  7. Common salt besides being used in kitchen can also be used as the raw ...

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  8. One of the constituents of baking powder is sodium hydrogen carbonate....

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  9. To protect tooth decay, we are advised to brush out teeth regularly. T...

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  10. Which of the following statements is correct about an aqueous solution...

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  11. The pH of the gastric juices released during digestion is

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  12. Which of the following phenomena occur when a small amount of acid is ...

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  13. Which one of the following can be used as an acid base indicator by a ...

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  14. Which of the following substances will not give carbon dioxide on trea...

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  15. Which of the following is acidic in nature ?

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  16. In an attempt to demonstrate electrical conductivity through an electr...

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  17. Which of the following is used for dissolution of gold ?

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  18. Which of the following is not a mineral acid?

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  19. Which of the following is not base ?

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  20. Which of the following statements is not correct ?

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