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Why commercial variety of zinc is used i...

Why commercial variety of zinc is used instead of pure zinc in the laboratory preparation of dihydrogen?

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CHHAYA PUBLICATION-HYDROGEN-WARM UP EXERCISE
  1. How can dihydrogen be prepared in the laboratory?

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  2. Although Fe is placed above hydrogen in the electrochemical series, di...

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  3. Why commercial variety of zinc is used instead of pure zinc in the lab...

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  4. Concentrated sulphuric acid cannot be used in the laboratory perparati...

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  5. Name a metal and a non-metal which on reaction with alkali liberates d...

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  6. Give an example and formula of a compound which on electrolysis libera...

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  7. Name two metals which can replace hydrogen from acid.

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  8. How can one prepare H(2) gas from water by using a reducing agent?

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  9. Write the industrial preparation of dihydrogen from water.

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  10. Explain why dihydrogen is relatively inert at room temperature.

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  11. Give example of two reaction one in which H(2) acts as on oxidising ag...

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  12. What do you mean by hardening of oils?

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  13. Show that the reactivity of halogens towards dihydrogen decreases on g...

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  14. Name two compounds, in one of which hydrogen is in + 1 and in the othe...

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  15. Explain why the chemical properties of ortho and para-hydrogen are the...

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  16. What is nascent hydrogen?

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  17. Show that nascent hydrogen is more active than ordinary molecular hydr...

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  18. What do you mean by atomic hydrogen?

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  19. Both dihydrogen and carbon monoxide burn in air with blue flame. How w...

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  20. Mention two advantages of using dihydrogen as a fuel with respect to g...

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