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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 supernatent soluton 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

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MODERN PUBLICATION-ACID, BASES AND SALTS-EXERCISE
  1. Sodium carbonate is a basic salt because it is a salt of

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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 corret increasing order or acidic str...

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  5. If a few drops of a concentrate acid accidently spills over the hand o...

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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. To protect tooth decay we are advised to brush our teeth regularly

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  9. One of the consituent of bakking powder is sodium hydrogen carbonate, ...

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  10. Which of the following statements is correct about an aqeuous 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 substance is brittle?

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  15. Which of the following is acidic in nature?

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  16. In an attempt to demonstarate electrical conductivity through an elect...

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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 among the following is not a base?

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  20. Which of the following statements is not correct?

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