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Sodium when burnt in excess of oxygen gi...

Sodium when burnt in excess of oxygen gives sodium oxide.

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The correct Answer is:
F
False.
Sodium when burnt in in excess of oxygen gives sodium peroxide `(Na_(2)O_(2))`. Lithium gives oxide, sodium gives peroxides and other alkali metals form superoxides in this reaction.
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1 g-atom of Ca was burnt in excess of oxygen and the oxide was dissolved in water to make up a one - liter solution. Calculate the normality of the alkaline solution.

When 5g of calcium is burnt in 2g of oxygen, then 7 g of calcium oxide of produced. What mass of calcium oxide will be produced when 5g of calcium is burnt in 20 g of oxygen ? Which law of chemical combination will govern your answer ?

Knowledge Check

  • When ethane is burnt in excess of oxygen,, the oxidation number of carbon changes by

    A
    `+8`
    B
    `+7`
    C
    `+3`
    D
    `+4`

  • When sodium reacts with excess of oxygen, oxidation number of oxygen changes from

    A
    `0-1`
    B
    `0-2`
    C
    `-1` to `-2`
    D
    `+1` to `-1`.

  • When sodium reacts with excess of oxygen, oxidation number of oxygen changes from

    A
    0 to-1
    B
    0 to - 2
    C
    `-1` to-2
    D
    ` +` 1 to -1

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