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Preparations and Uses of Caustic Soda

Precipiate fo...

Question

Precipiate formed on reaction of zinc salts with ammonium hydroxide is soluble in an excess of ammonium hydroxide solution.

A

True

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B

False

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Solution

The correct option is A True

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Q. Assertion :Ammonium hydroxide solution is added to zinc nitrate solution slowly and then in excess we see white precipitates are soluble Reason: Ammonium hydroxide solution is added to zinc nitrate solution slowly white precipitates of ammonium nitrate is formed and when ammonium hydroxide is added in excess then the white precipitates are soluble in it

Zinc nitrate reacts with ammonium hydroxide to give a white gelatinous precipitate of X which is soluble in excess of ammonium hydroxide. What is X?

Q. Assertion :We can distinguish between

Z n^{2 +}

P b^{2 +}

using ammonium hydroxide solution. Reason: Zinc ions with ammonium hydroxide gives white precipitate of zinc hydroxide which dissolves in excess of ammonium hydroxide. Aqueous solution of lead salt do not show any change on treatment with ammonium hydroxide

The precipitate of zinc hydroxide formed during a reaction does not dissolve in excess of ammonium hydroxide.

How would you distinguish between Zn²⁺ and Pb²⁺ using ammonium hydroxide solution?

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Preparations and Uses of Caustic Soda

Standard XII Chemistry

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