Which of these salts will give a white precipitate with a Barium chloride solution?

Blue vitriol

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Green vitriol

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White vitriol

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All of the above.

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Solution

The correct option is D
All of the above.

An explanation for the correct option:
During a double decomposition reaction, when two ionic substances are mixed together, on the exchange of their ions two new substances are formed, and generally, one of the products is insoluble and called a precipitate.
Barium chloride when mixed with the salt that is insoluble in hydrochloric acid gives out the precipitate.
Barium chloride reacts with sulphate ions of salt to form a white precipitate of Barium sulphate $B a S O_{4}$ .
In the case of blue, green and white vitriol all of these will give Barium sulphate $B a S O_{4}$ on reaction, hence all the three options here are correct.
$\underset{(B l u e v i t r i o l)}{\underset{⏟}{C u S O_{4} . 5 H_{2} O (s)}} + \underset{(B a r i u m c h l o r i d e)}{\underset{⏟}{B a C l_{2} (s)}} \to \underset{\underset{(W h i t e)}{\underset{⏟}{(B a r i u m s u l p h a t e)}}}{\underset{⏟}{B a S O_{4} (s) ↓}} + \underset{(C o p p e r c h l o r i d e)}{\underset{⏟}{C u C l_{2} (s)}} + \underset{(W a t e r)}{\underset{⏟}{5 H_{2} O (l)}}$
$\underset{(G r e e n v i t r i o l)}{F e S O_{4} . 7 H_{2} O (s)} + \underset{(B a r i u m c h l o r i d e)}{\underset{⏟}{B a C l_{2} (s)}} \to \underset{\underset{(W h i t e)}{\underset{⏟}{(B a r i u m s u l p h a t e)}}}{\underset{⏟}{B a S O_{4} (s) ↓}} + \underset{(F e r r o u s c h l o r i d e)}{\underset{⏟}{F e C l_{2} (s)}} + \underset{(W a t e r)}{\underset{⏟}{7 H_{2} O (l)}}$
$\underset{(W h i t e v i t r i o l)}{Z n S O_{4} . 7 H_{2} O (s)} + \underset{(B a r i u m c h l o r i d e)}{\underset{⏟}{B a C l_{2} (s)}} \to \underset{\underset{(W h i t e)}{\underset{⏟}{(B a r i u m s u l p h a t e)}}}{\underset{⏟}{B a S O_{4} (s) ↓}} + \underset{(Z i n c c h l o r i d e)}{\underset{⏟}{Z n C l_{2} (s)}} + \underset{(W a t e r)}{\underset{⏟}{7 H_{2} O (l)}}$
Therefore, the correct option is (D) All of these.

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