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A solution of salt in HCl when diluted w...

A solution of salt in `HCl` when diluted with excess of water turns milky. It indicates the presence of

A

`Al`

B

`Bi`

C

`Sb`

D

`Zn`

Text Solution

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The correct Answer is:
To solve the question step by step, we need to analyze the information provided and apply our knowledge of qualitative analysis. ### Step 1: Understand the Reaction When a salt is dissolved in hydrochloric acid (HCl), it can form a soluble salt. In this case, we are interested in the behavior of the salt when diluted with excess water. ### Step 2: Identify the Possible Salts The question mentions four possible salts: aluminium, bismuth, antimony, and zinc. We need to determine which of these salts would produce a milky solution upon dilution with water. ### Step 3: Analyze the Behavior of Each Salt 1. **Aluminium**: When aluminium salts are treated with HCl, they generally do not form a precipitate when diluted with water. 2. **Bismuth**: Bismuth salts, when dissolved in HCl, form BiCl3. Upon dilution with excess water, BiCl3 reacts to form a white precipitate of bismuth hydroxide, Bi(OH)3, which gives a milky appearance. 3. **Antimony**: Antimony salts do not typically form a milky solution when diluted with water. 4. **Zinc**: Zinc salts also do not produce a milky solution upon dilution with water. ### Step 4: Conclusion Since the only salt that produces a white milky precipitate upon dilution with excess water is bismuth, we conclude that the presence of bismuth is indicated by the milky solution. ### Final Answer The presence of **bismuth** is indicated by the milky appearance when the solution of salt in HCl is diluted with excess water. ---
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