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Sodium metal is kept under kerosene. Exp...

Sodium metal is kept under kerosene. Explain.

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Sodium metal is very reactive . When exposed to air , it reacts with oxygen , moisture and carbon dioxide present in the air .
`4Na(s) overset(O_2) to underset("Sodium oxide")(2Na_2O)`
`2Na_2O overset(2H_2O) to underset("Sodium carbonate")(2Na_2CO_3) + 2H_2O`
Therefore , to prevent these reactions and protect the metal , sodium is kept under kerosene.
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Assertion (A): Sodium metal is stored under kerosene. Reason (R ): Metallic sodium melts when exposed to air.

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Knowledge Check

  • Assertion (A): Sodium metal is stored under kerosene. Reason (R) : Metallic sodium melts when exposed to air

    A
    Both A and R is true and R is the correct explanation of A
    B
    Both A and R is true but R is not a correct explanation of A
    C
    A is true but R is false
    D
    A is false but R is true

  • Assertion (A): Sodium metal is stored under kerosene. Reason (R ): Metallic sodium melts when exposed to air.

    A
    Both A and R are true and R is the correct explanation of A.
    B
    Both A and R are true but R is NOT the correct explanation of A.
    C
    A is true but R is false.
    D
    A is false and R is true.

  • Sodium metal can be kept under:

    A
    Kerosene
    B
    Benzene
    C
    Toluene
    D
    Alcohol
    • MODERN PUBLICATION-S-BLOCK ELEMENTS ( ALKALI AND ALKALINE EARTH METALS ) -Conceptual Question 1
    1. Sodium metal is kept under kerosene. Explain.

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    2. All compounds of alkali metals are easily soluble in water but lithium...

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    3. ANOMALOUS BEHAVIOUR OF LITHIUM

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    4. Name the alkali metals which form superoxides when heated in excess of...

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    5. Name the metal which floats on water without any apparent reaction wit...

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    6. Predict giving reason, the outcome of the reaction: LiI + KF to

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    7. Why does the following reaction : proceed better with KF than w...

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    8. What compounds are formed when Li and Na combine with oxygen. Give the...

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    9. Explain why sodium is less reactive than potassium.

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    10. Why are potassium and cesium, rather than lithium can be used in photo...

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    11. Why are lithium salts commonly hydrated while those of other alkali me...

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    12. Why it LiF almost insoluble in water while LiCl is soluble not only in...

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    13. Lithium is the only alkali metal to form nitride directly. Explain .

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    14. An aqueous solution of sodium carbonate gives alkaline tests . Why ?

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    15. Why is Li(2)CO(3) decomposed at a lower temperature whereas Na(2)CO(3)...

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    16. LiH, LiF and Li(3)N show exceptional thermal stabilites. Comment.

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    17. Which out of Li or Na has greater value for the following properties :...

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    18. Which out of the following and why can be used to store an alkali met...

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    19. Why are alkali metals not found free in nature?

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    20. Why caesium can be used in photoelectric cell, while lithium cannot be...

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