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Can we use concentrated sulphuric acid a...

 Can we use concentrated sulphuric acid and pure zinc in the preparation of dihydrogen?

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Conc. `H_(2)SO_(4)` cannot be used because it acts as an oxidizing agent also and gets reduced to `SO_(2)`  
`Zn+2H_(2)SO_(4)(Conc.)toZnSO_(4)+2H_(2)O+SO_(2)`
Pure Zn is not used because it is non-porous and reaction will be slow. The impurities in Zn help in constitute of electrochemical couple and speed up reaction.
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FULL MARKS-HYDROGEN -Additional Questions Solved 2-Mark Questions
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  3. Prove that Hydrogen peroxide is a vigorous oxidising agent and the sol...

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  8. What is hydrogen bonding?

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  9. What are the types of hydrogen bonding? Give example.

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  10. Explain about the type of bonding present in hydrogen fluoride?

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  12. Draw the structure of (i) Acetic acid (ii) Water.

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  13. Write a note about gas hydrates.

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  17. How does H(2)O(2) behave as bleaching agent?

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  18. Can we use concentrated sulphuric acid and pure zinc in the preparatio...

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  19. Write the chemical reactions to show the amphoteric nature of water.

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  20. Why is hydrogen peroxide stored in wax-lined plastic coloured bottles?

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