Question

please answer me the answer fast and please answer all​

Answer 1

yes souring of milk is a chemical change as it is irreversible as souring of milk leads to formation of acid which can’t be turned back

Answer 2

Answer:

Answer 1• Galvanisation or galvanization (or galvanizing as it is most commonly called) is the process of applying a protective zinc coating to iron or steel, to prevent rusting. The most common method is hot dip galvanizing, in which steel sections are submerged in a bath of molten zinc

Answer 2. Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon and other alloying elements. Stainless steel's corrosion resistance and mechanical properties can be further enhanced by adding other elements, such as nickel, molybdenum, titanium, niobium, manganese, etc

Answer 3. Formation of manure from leave is a chemical change because the manure formed has different composition from the leaves

Answer 4. So chemical changes require a change on a molecular level that cannot be reversed because they form some new substance. Souring milk is not something you can reverse, and the process of it souring produces new molecules