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Why is nitric acid added to sodium extra...

Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?

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Why is acid added to sodium extract before adding silver nitrate for testing halogens ?

The function of boiling the sodium extract with concentrated nitric acid before testing halogen is

Knowledge Check

  • Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

    A
    nitric acid
    B
    ammonia
    C
    hydrochloric acid
    D
    sodium hydroxide

  • Nitric acid is added to sodium fusion extract and the solution is boiled before adding silver nitrate for testing halogens because

    A
    the extract is alkaline and thus must be neutralized.
    B
    intric acid decomposes sodium cyanide or sodium sulphide (if present) to hydrogen cyanide and hydrogen sulphide gases, respectively.
    C
    nitric acid oxidizes halogen to halide ion.
    D
    nitric acid dissolves silver nitrate.

  • The function of boiling the sodium extract with concentrated nitric acid before testing halogens is

    A
    to make solution clear
    B
    to destroy `CN^- and S^(2- )ion`
    C
    to make the solution acidic
    D
    to bring common ion effect.

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    Write the balanced chemical equations for the following : (a) Pb_(3)O_(4) is treated with nitric acid. (b) Zinc oxide is treated with excess of sodium hydroxide solution. (c) Dilute nitric acid is slowly reacted with metallic tin. (d) Gold is dissolved in aqua regia. (e) Iron reacts with cold dilute nitric acid. (f) Sodium thiosulphate is added slowly to silver nitrate. (g) Heating of ZnCI_(2).2H_(2)O .

    Why is sodium carbonate extract acidified before perfoming the confirmatory tests for anions?

    Why it is necessary to use acetic acid and not sulphuric acid for acidification of sodium extraction for testing sulphur by lead acetate test ?

    Why is it necessary to use acetic acid and not suplhuric acid for the acidification of sodium extract for testing suplhur by lead acetate test?

    Sodium extract is heated with concentrated HNO_(3) before testing for halogens because :

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