Potassium Iodide have a lot of strong bonds which requires a very high temperature (high energy) to break them and change into a different state of matter.
2.a)R b)R c)L d)L e)R f)L g)L
Too many to know in the world.
Flower and sugar
flowers in sugar water? something along these lines
1) The metal which reduces the other compound is the one higher in the reactivity. So in this case it is
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2) The substance which brings about reduction while itself getting oxidised (that is losing electrons) is called a reducing agent. Here, $\mathrm{Zn}$ is the reducing agent and reduces Cobalt Oxide to Cobalt while itself getting oxidised to Zinc oxide.