Complete the following reactions: from Chemistry Hydrogen
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    Hydrogen

    Multiple Choice QuestionsShort Answer Type

    81.

    Complete the following reactions:

    bold CO bold left parenthesis bold g bold right parenthesis bold space bold plus bold space bold H subscript bold 2 bold left parenthesis bold g bold right parenthesis bold space bold space bold rightwards arrow from bold Catalyst to bold increment of

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    82.

    Complete the following reactions:

    CuO left parenthesis straight s right parenthesis space plus space straight H subscript 2 left parenthesis straight g right parenthesis space space rightwards arrow

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    83. Comment on the reactions of dihydrogen with: (i) chlorine (ii) sodium and (iii) copper (II) oxide. 
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    84.

    What do you understand by hydrogenation of oils or hardening of oils ?

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    85.

    What do you understand by the term fuel cell?

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    86. Complete the following equations:
    CO left parenthesis straight g right parenthesis space plus space straight H subscript 2 left parenthesis straight g right parenthesis space rightwards arrow from catalyst to increment of or CO left parenthesis straight g right parenthesis space plus space straight H subscript 2 space rightwards arrow from 700 straight K comma space 200 space atm to ZnO divided by Cr subscript 2 straight O subscript 3 of ?
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    87. Complete the following equations:
    HC identical to CH space plus space straight H subscript 2 space rightwards arrow from Heat to Ni of space ?
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    88. Complete the following equations:
    Zn space plus space NaOH space space rightwards arrow space ?
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    89.

    Why does elemental hydrogen react with other substances only slowly at room temperature?

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    90.

    What are hydrides? Give their types.

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