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Standard X

Chemistry

Zinc Ion

If B gives ...

Question

If $B$ gives white fumes with HCl. $C$ decolorizes acidified $K M n O_{4}$ . Identify $A$ .

K_{2} C_{2} O_{4}

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(N H_{4})_{2} C_{2} O_{4}

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L i_{2} C_{2} O_{4}

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(N H_{4})_{2} S O_{4}

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Solution

The correct option is B $(N H_{4})_{2} C_{2} O_{4}$
$(N H_{4})_{2} C_{2} O_{4} + 2 N a O H \to 2 N H_{3} (g a s) + N a_{2} C_{2} O_{4} + 2 H_{2} O$

$C a C l_{2} + (N H 4)_{2} C_{2} O_{4} \to C a C_{2} O_{4} (w h i t e p p t) + 2 N H_{4} C l$ .
Hence, option $B$ is correct.

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Similar questions

\begin{matrix} [C] & C a C l_{2} \leftarrow -- - & [A] & K O H - -- \to Δ & [B] C o l o u r l e s s & G a s, g i v i n g s a l t & w h i t e f u m e s w i t h H C l \end{matrix}

White ppt.

[C]

decolorizes pink color of acidified

K M n O_{4}

, then

[A]

is :

The salt (A) is

Q. Colourless salt

(A) + N a O H Δ ⟶ g a s (B)

giving white fumes with

H C l

+ alkaline solution

(C)

(C) + Z n ⟶ g a s (B) (A) Δ ⟶ g a s (D) + l i q u i d (E)      b o t h t r i a t o m i c

. Identify

(A), (B), (C), (D)

and

(E)

Q. Identify A, B, C, D and choose the correct statement(s):

A + N_{2} △ - \to B H_{2} O - - \to C w h i t e p p t ↓ + D

White precipitate(C) dissolves in

N a O H

solution and the gas (D) gives white fumes with

H C l

Identify (A), (B), (C), (D) and (E) in the following:

Alkali metal $(A) + N_{2} Δ \to (B) H_{2} O \to (C) + (D)$ (C) and (D) both react with HCl, but (D) gives white fumes (E) with HCl..According to above experiment complete the matrix.

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If B gives white fumes with HCl. C decolorizes acidified KMnO4. Identify A.

The correct option is B (NH4)2C2O4(NH4)2C2O4+2NaOH→2NH3(gas)+Na2C2O4+2H2OCaCl2+(NH4)2C2O4→CaC2O4(white ppt)+2NH4Cl.Hence, option B is correct.

If $B$ gives white fumes with HCl. $C$ decolorizes acidified $K M n O_{4}$ . Identify $A$ .

The correct option is B $(N H_{4})_{2} C_{2} O_{4}$
$(N H_{4})_{2} C_{2} O_{4} + 2 N a O H \to 2 N H_{3} (g a s) + N a_{2} C_{2} O_{4} + 2 H_{2} O$

$C a C l_{2} + (N H 4)_{2} C_{2} O_{4} \to C a C_{2} O_{4} (w h i t e p p t) + 2 N H_{4} C l$ .
Hence, option $B$ is correct.