In acidic medium moles of `KMnO_4`required to oxidise 1.5 moles of `Cu_2S` will be :-

Explanation

To solve the problem of determining the moles of KMnO4 required to oxidize 1.5 moles of Cu2S in acidic medium, we will follow these steps:

### Step 1: Determine the oxidation states
- In Cu2S, copper (Cu) has an oxidation state of +1 (as it is in the +1 oxidation state in Cu2S) and sulfur (S) has an oxidation state of -2.
- In the reaction, Cu2S will be oxidized to Cu2+, where copper's oxidation state changes from +1 to +2.

### Step 2: Calculate the change in oxidation states
- For Cu2S:
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