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Give reason for the following: Potass...

Give reason for the following:
Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in laboratory preparation of hydrogen.

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Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in laboratory preparation of hydrogen because potassium and sodium react violently with acids.
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ICSE-STUDY OF THE FIRST ELEMENT - HYDROGEN-TOPIC 1 Hydrogen and its Laboratory Preparation (2 MARK QUESTIONS)
  1. Write balanced equations and give your observations when the following...

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  2. Write balanced equations and give your observations when the following...

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  3. Write balanced equations and give your observations when the following...

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  4. From the knowledge of activity series, name a metal which shows the fo...

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  5. From the knowledge of activity series, name a metal which shows the fo...

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  6. From the knowledge of activity series, name a metal which shows the fo...

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  7. From the knowledge of activity series, name a metal which shows the fo...

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  8. Which test should be made before collecting hydrogen in a gas jar?

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  9. Why is nitric acid not used in the preparation of hydrogen?

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  10. Hydrogen is evolved when dilute HCl reacts with magnesium, but nothing...

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  11. What happens when a metal and a non metal reacts with steam? Name the ...

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  12. Give reason for the following: Though lead is above hydrogen in the ...

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  13. Give reason for the following: Potassium and sodium are not used fo...

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  14. If the following are kept in closed vessels at over 400^@C, what would...

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  15. If the following are kept in closed vessels at over 400^@C, what would...

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  16. (a) A metal in the powdered form reacts very slowly with the boiling w...

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  17. Write the composition of Sodium amalgam

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  18. What is the composition of water? In what volume its elements combine ...

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  19. Name any one metal which is preferred for the preparation of hydrogen...

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  20. Which metal is preferred for preparation of hydrogen from acid ?

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