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Preparations and Uses of Caustic Soda

An inorganic ...

Question

An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). An aqueous solution of, (A) gives a white precipitate (C) with $N a O H$ solution which is soluble in excess of $N a O H$ . (A) reduces auric chloride to produce purple of cassius, (A) also reduces iodine and gives chromyl chloride test. Find a total number of OH group present in one molecule of product C.

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Solution

$(A) = {S n C l}_{2}; (B) S n (O H) C l; (C) = {S n (O H)}_{2}$
${S n C l}_{2} (A) + H_{2} O \to S n (O H (B)) C l + H C l$
${S n C l}_{2} + N a O H \to {S n (O H (C))}_{2} + 2 N a C l$
${S n (O H)}_{2} + 2 N a O H \to {N a}_{2} {S n O}_{2} + 2 H_{2} O$
${3 S n C l}_{2} + 2 {A u C l}_{3} \to 3 {S n C l}_{4} + 2 A u$
${3 S n C l}_{2} + 2 H C l + I_{2} \to {S n C l}_{4} + 2 H I$
Thus, product C contain 2 $O H$ group.

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An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What is 'B' in the chemical reactions.

An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What is 'B' in the chemical reactions.

Q. An unknown inorganic compound

(X)

loses its water of crystallisation. On heating its aqueous solution gives the following reacion:
(i) it gives a white turbidity with dilute

H C l

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(ii) it decolourises a solution of iodine in

K I

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(iii) it gives a white precipitate with

A g N O_{3}

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Identify compound

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Q. An inorganic compound

A

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(i) It is white solid, exists as dimer and fumes in the wet air.
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180^{\circ} C

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400^{\circ} C

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N H_{4} O H

N H_{4} O H

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A

gives a gelatinous precipitate which in however soluble in excess of

N a O H

A

A black colored compound (A) on reaction with

d i l . H_{2} S O_{4}

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