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Which of the following is used for disso...

Which of the following is used for dissolution of gold ?

A

Hydrochloric acid

B

Sulphuric acid

C

Nitric acid

D

Aqua regia

Text Solution

Verified by Experts

The correct Answer is:
D
Aqua Regia is a mixture of concentrated `HNO_(3)` and concentrated HCl. Concentrated `HNO_(3)` acts as a very strong oxidising agent which ionises Au atoms and Concentrated HCl produces nascent chlorine which in turn reacts with ionised Au atoms thus forming auric chloride.
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OSWAL PUBLICATION-ACIDS, BASES AND SALTS-NCERT EXEMPLAR (Multiple Choice Type Questions )
  1. Which of the following is acidic in nature ?

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  2. In an attemp to demonstrate electrical conductivity through an electro...

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

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

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  5. Which amongst the following is not a base?

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  6. Which of the following statements is not correct?

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  7. Match the chemical substances given in Column (A) with their appropria...

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  8. Equal volumes of hydrochloric acid and sodium hydroxide solutions of s...

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  9. Which of the following is /are true when HCI (g) is passed through wat...

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  10. Which of the following statement is true for acids?

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  11. Which of the following are present in a dilute aqueous solution of hyd...

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  12. Identify the correct represention of reaction occureing during chloral...

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  13. Match the acids given in Column A with their correct source given in C...

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  14. Match the important chemicals given in column (A) with the chemical fo...

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  15. What will be the action of the following substances on litmus paper? ...

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  16. Name the acid present in ant sting and give its chemical formula. Also...

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  17. What happens when nitric acid is added to egg shell ?

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  18. A student prepared solutions of (i) an acid and (ii) a base in two sep...

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  19. How would you distinguish between baking powder and washing soda by he...

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  20. Salt A commonly used in bakery products on heating gets converted into...

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