Solving part-1 only
#1
KMnO_4
- Transition metal is Manganese (Mn)
#2
Actually it's the oxidation number of Mn
Let's find how?




- x is the oxidation number
#3
- Purple as per the color of potassium permanganate
#4

Answer:
iodine.
<h2>..................</h2>
The energy change? from light energy to chemical energy
Answer:
Your house will more or less catch fire.
Explanation: