When preparing Mohr’s salt, \(\text{H}_2\text{SO}_4\) is added for the following reasons:
Step 1: Understanding the role of \(\text{H}_2\text{SO}_4\)
Ferrous sulphate is prone to hydrolysis in aqueous solutions, especially when exposed to atmospheric oxygen. The hydrolysis leads to the formation of ferric hydroxide, which can contaminate the Mohr’s salt crystals.
Adding dilute sulphuric acid prevents the hydrolysis of ferrous sulphate by maintaining an acidic medium, which stabilizes the ferrous ions and prevents oxidation or decomposition.
Step 2: Reason for not choosing other options
Option (2): Ammonium sulphate does not hydrolyze under normal conditions, so preventing its hydrolysis is irrelevant.
Option (3): Although adding \(\text{H}_2\text{SO}_4\) makes the medium acidic, the main purpose is to prevent hydrolysis.
Option (4): The rate of formation of crystals is not directly influenced by \(\text{H}_2\text{SO}_4\) but rather by cooling and saturation.
Conclusion:
The correct reason for adding \(\text{H}_2\text{SO}_4\) is to prevent the hydrolysis of ferrous sulphate.
Identify the structure of the final product (D) in the following sequence of the reactions :
Total number of $ sp^2 $ hybridised carbon atoms in product D is _____.
Given below are two statements :
In the light of the above statements, choose the most appropriate answer from the options given below :
The number of optically active products obtained from the complete ozonolysis of the given compound is :
Match List-I with List-II: List-I