A mixture of ferric alum, chrome alum and potash alum is dissolved in water and treated with an excess of an $N H_{3}$ solution. The precipitate is filtered and the residue is warmed with a mixture of $N a O H$ and $H_{2} O_{2}$ and filtered. We will get:

a green residue and a yellow filtrate

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a brown residue and a yellow filtrate

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a brown residue and a green filtrate

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a blue residue and a green filtrate

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Solution

The correct option is B a brown residue and a yellow filtrate

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Q. A compound (A) is greenish crystalline salt which gave the following results :
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(E) dissolves in warm concentrated HCl to give a yellow solution (F).

With H

_{2}

S, the solution (F) yields a pale yellow ppt. (G), which when filtered, leaves a greenish filtrate (H).

What is compound H?

Q. A white powder

A

on heating gave a non-combustible gas and a white residue. The residue on heating turns yellow. The residue dissolves in dilute

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. Compound

A

is:

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A mixture of ferric alum, chrome alum and potash alum is dissolved in water and treated with an excess of an NH3 solution. The precipitate is filtered and the residue is warmed with a mixture of NaOH and H2O2 and filtered. We will get:

The correct option is B a brown residue and a yellow filtrate

A mixture of ferric alum, chrome alum and potash alum is dissolved in water and treated with an excess of an $N H_{3}$ solution. The precipitate is filtered and the residue is warmed with a mixture of $N a O H$ and $H_{2} O_{2}$ and filtered. We will get: