A solution ' $X$ ' is added to a test tube containing sodium chloride solution. A white curdy precipitate is formed. The chemical equation of the reaction is given below.
$N a C l + X \to A g C l + N a {N O}_{3}$
(a) What is ' $X$ '?
(b) Identify the white curdy precipitate.
(c) What happens if ammonium hydroxide solution is added to the white curdy precipitate?
(d) The presence of which salt can be identified using this experiment?

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Solution

(a) $A g {N O}_{3}$
(b) The white curdy precipitate is $A g C l$ (silver chloride)
(c) On adding a few drops of ${N H}_{4} O H$ , the white curdy precipitate gets dissolved in the ${N H}_{4} O H$ solution.
(d)Presence of NaCl can be identified using this reaction.

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What happens when HCl is treated with an aqueous solution of $A g N O_{3}$ ?

Q. To aqueous solution of

X

on adding

C u S O_{4}

a brown precipitate is obtained which turns white on adding of excess of

N a_{2} S_{2} O_{3}

solution; on addition of

A g^{+}

ion solution, a yellow curdy precipitate is obtained which is insoluble in

N H_{4} O H

; then

X

will be :

Question 43

On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite, white precipitate is obtained.

(a) Write a balanced chemical equation of the reaction involved.

(b) What other name can be given to this precipitation reaction?

Q. (a) Sodium hydroxide solution is added to solution A. A white precipitate is formed which is insoluble in excess sodium hydroxide solution. Name the metal ion present in solution A.
(b) When ammonium hydroxide is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide to give an inky blue solution. Name the cation present in solution B. What is the probable colour of solution B?

When sodium sulphate solution is added to barium chloride, a white precipitate is formed. Write the chemical name of precipitate obtained and type of chemical reaction involved in this process.

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(a) AgNO3(b) The white curdy precipitate is AgCl (silver chloride)(c) On adding a few drops of NH4OH, the white curdy precipitate gets dissolved in the NH4OH solution.(d)Presence of NaCl can be identified using this reaction.

(a) $A g {N O}_{3}$
(b) The white curdy precipitate is $A g C l$ (silver chloride)
(c) On adding a few drops of ${N H}_{4} O H$ , the white curdy precipitate gets dissolved in the ${N H}_{4} O H$ solution.
(d)Presence of NaCl can be identified using this reaction.