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A compound is soluble in water. If ammon...

A compound is soluble in water. If ammonia is added to aqueous solution of compound, a reddish brown precipitate appears which is soluble in dill. HCl. The compound is a salt of :

A

aluminium

B

zinc

C

iron

D

cadmium

Text Solution

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The correct Answer is:
To solve the problem step-by-step, we need to analyze the information given in the question and the reactions involved. ### Step 1: Identify the nature of the compound The question states that the compound is soluble in water. This indicates that we are dealing with a water-soluble salt. **Hint:** Look for compounds that are known to be soluble in water, such as certain metal salts. ### Step 2: Understand the reaction with ammonia When ammonia (NH3) is added to the aqueous solution of the compound, a reddish-brown precipitate forms. This suggests the formation of a metal hydroxide, which typically occurs when a metal salt reacts with ammonia. **Hint:** Recall that certain metal ions form colored precipitates when reacted with hydroxide ions. ### Step 3: Identify the precipitate The reddish-brown precipitate that forms is likely to be ferric hydroxide (Fe(OH)3), which is known to be reddish-brown in color. This indicates that the original compound is likely a salt of iron (Fe). **Hint:** Consider the common precipitates formed by metal ions in the presence of hydroxide ions. ### Step 4: Test the solubility of the precipitate in dilute HCl The problem states that the reddish-brown precipitate is soluble in dilute hydrochloric acid (HCl). Ferric hydroxide (Fe(OH)3) dissolves in dilute HCl to form iron(III) chloride (FeCl3). **Hint:** Remember that many metal hydroxides are soluble in acids, leading to the formation of their corresponding salts. ### Step 5: Conclusion Based on the above steps, we can conclude that the compound is a salt of iron. Therefore, the answer to the question is that the compound is a salt of iron (Fe). **Final Answer:** The compound is a salt of iron (Fe).
To solve the problem step-by-step, we need to analyze the information given in the question and the reactions involved. ### Step 1: Identify the nature of the compound The question states that the compound is soluble in water. This indicates that we are dealing with a water-soluble salt. **Hint:** Look for compounds that are known to be soluble in water, such as certain metal salts. ### Step 2: Understand the reaction with ammonia ...
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