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Byju's Answer

Standard XII

Chemistry

Stoichiometry

When an aqueo...

Question

When an aqueous solution of gas $(X)$ is added to $F e C l_{3}$ solution, a brown precipitate is obtained which is soluble in dil. $H N O_{3}$ , gas $(X)$ will give white fumes with $H C l$ , then gas $(X)$ is :

S O_{2}

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C l_{2}

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C O_{2}

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N H_{3}

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Solution

The correct option is B $N H_{3}$
Gas $X$ is $N H_{3}$
When an aqueous solution of $N H_{3}$ gas is added to $F e C l_{3}$ solution, a brown precipitate of $F e (O H)_{3}$ is obtained which is soluble in $d i l . H N O_{3}$ .
$F e C l_{3}$ + $N H_{3}$ + $H_{2} O$ + $N H_{4} C l$ $⟶ F e (O H)_{3} ↓$ + $N H_{4} C l$
$N H_{3}$ gives white fumes with $H C l$
$N H_{3} + H C l ⟶ N H_{4} C l (w h i t e f u m e s)$

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Similar questions

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(i) It turns red litmus blue.
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Q. An acidic solution of ‘X’ does not give precipitate on passing

H_{2} S

gas. ‘X’ gives a white precipitate when

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is added to it. The white precipitate dissolves in excess of

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H_{2} S O_{4}

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When an aqueous solution of gas (X) is added to FeCl3 solution, a brown precipitate is obtained which is soluble in dil. HNO3, gas (X) will give white fumes with HCl, then gas (X) is :

The correct option is B NH3Gas X is NH3When an aqueous solution of NH3 gas is added to FeCl3 solution, a brown precipitate of Fe(OH)3 is obtained which is soluble in dil.HNO3. FeCl3 +NH3 +H2O +NH4Cl ⟶Fe(OH)3↓ +NH4Cl NH3 gives white fumes with HClNH3+HCl⟶NH4Cl (whitefumes)

When an aqueous solution of gas $(X)$ is added to $F e C l_{3}$ solution, a brown precipitate is obtained which is soluble in dil. $H N O_{3}$ , gas $(X)$ will give white fumes with $H C l$ , then gas $(X)$ is :