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Give reasons. Alkali metals and haloge...

Give reasons.
Alkali metals and halogens do not occur free in nature.

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The alkali metals

Give reasons for the following: a. Alkli metals do not occur free in nature. b. Alkali metal salts impart characteristic colour to the flame. c. Caesium is used in photoelectric cell. d. Alkali metals are good reducing agents in aqueous medium.

Knowledge Check

  • The alkali metals

    A
    form salt-like hydrides
    B
    form predominantly covalent salts
    C
    show decreased chemical reactivity with oxygen in going from Li to Cs
    D
    show increasing electronegativity form Li to Cs.

    • Similar Questions

    Explore conceptually related problems

    Give reasons. Alkali metals are kept in inert solvent.

    Give reason: Alkali metals are good reducing agents

    Name some elements that can occur free in nature

    Name some elements that can occur free in nature

    Give reasons why? Alkali metals are good reducing agent.

    Why do lithium and sodium not occur in free state in nature ?

    Assertion (A): Alkali metals do not occur in native state. Reason (R ): Alkali metlas are highly reactive elements.

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