JEE Main Chemistry question
How many of the following reactions are redox reactions? 1. ; 2. ; 3. ; 4. ; 5. ; 6. ; 7. Cr_2O_3+2Al \to Al_2O_3+2Cr; 8.
Answer: 5
Solution
Reactions 1, 3 and 4 are simple acid–base/addition reactions with no change in oxidation state. Reactions 2 (Cu: ), 5 (Cl: ,
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