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Give reason for the following: Though...

Give reason for the following:
Though lead is above hydrogen in the activity series,still it is not used to prepare hydrogen.

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ICSE-STUDY OF THE FIRST ELEMENT - HYDROGEN-EXERCISE 6(C)
  1. Hydrogen is obtained by displacement from: dilute hydrochloric acid ...

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  2. Why is copper not used in preparation of hydrogen?

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

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

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  5. Name two alkalies that can displace hydrogen. Give balanced equations ...

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  6. Complete and balance the following reactions. Na + H2 O to +

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  7. Complete and balance the following reactions. Ca + H2 O to +

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  8. Complete and balance the following reactions. Mg + H2 O to +

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  9. Complete and balance the following reactions. Zn + H2 O to +

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  10. Complete and balance the following equation : Fe + H2 O

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  11. Complete and balance the following reactions. Zn + HCI to +

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  12. Complete and balance the following reactions. Al + H2 SO4 to +

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  13. Complete and balance the following reactions. Fe + HCl to +

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  14. Complete and balance the following reactions. Zn + NaOH to +

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  15. Complete and balance the following reactions. Al+KOH + H2O to +

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

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

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  18. A metal in the powdered form reacts very slowly with boiling water, bu...

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  19. Write a balanced equation for the reaction of the named metal with (i)...

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  20. What do you observe when hydrogen gas is passed through soap solution ...

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