Which is an example of an exothermic process? boiling of milk melting of wax freezing of water evaporation of water heating of water

Option (a) is the correct answer.

Explanation:

A process in which heat is absorbed by the atoms of a substance is known as endothermic process. Here, energy of products is more than the energy of reactants.

Whereas a process in which heat is released by the atoms of a substance is known as exothermic process. Here, energy of reactants is more than the energy of products.

So, when milk boils then energy is releasing in the form of steam. When wax melts then it means heat is absorbed by wax molecules.

When water freezes then also energy is absorbed due to which molecules are coming closer to each other.

Whereas evaporation and heating of water will are also endothermic as heat is absorbed in both the cases.

Thus, we can conclude that boiling of milk  is an example of an exothermic process.

answer; economic order quantity;

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6