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24 gm pure sample of magnesium is burnt ...

24 gm pure sample of magnesium is burnt in air to form magnesium oxide and magnesium nitride. When products are treated with excess of `H_(2)O` , 3.4 gm of gaseous `NH_(3)` is generated according to given reactions.
`Mg+O_(2) rarr MgO`
`Mg+N_(2)rarr Mg_(3)N_(2)`
`Mg_(3)N_(2)+ 6H_(2)O rarr 2Mg(OH)_(2)+2NH_(3)`
Calculate the amount of magnesium oxide (in gm) in products.

A

28

B

20

C

16.8

D

32

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A
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Knowledge Check

  • 24 gm pure sample of magnesium is burnt in air to form magnesium oxide and magnesium nitride. When products are treated with excess of H_(2)O , 3.4 gm of gaseous NH_(3) is generated according to given reactions. Mg+O_(2) rarr MgO Mg+N_(2)rarr Mg_(3)N_(2) Mg_(3)N_(2)+ 6H_(2)O rarr 2Mg(OH)_(2)+2NH_(3) Calculate the amount of Mg(OH)_(2) (in gm) produced in above reaction.

    A
    11.6
    B
    17.4
    C
    23.2
    D
    15.8

  • In the reaction 3 Mg+N_(2) rarr Mg_(3)N_(2)

    A
    Magnesium is reduced
    B
    Magnesium is oxidized
    C
    Nitrogen is oxidized
    D
    None of these

  • In the reaction 3Mg + N_2 rarr Mg_3N_2

    A
    magnesium is reduced
    B
    magnesium is oxidized
    C
    nitrogen is oxidized
    D
    None of these

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