Question

classifying the following change in chemical change and physical change
1.ice turned into water 2.ripening of fruit
3.rusting of iron nail
4.milk into curd
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Answer 1

Answer : 1. You added enough energy to create a phase change from solid to liquid. Physical actions, such as changing temperature or pressure, can cause physical changes. No chemical changes took place when you melted the ice. The water molecules are still water molecules.

2.Ripening of fruits is a chemical change since a new substance is formed which changes the taste of the fruits

3. Rusting of iron: Chemical. Explanation: When iron rusts, 3 oxygen atoms combine with every 2 iron atoms. Bending of iron: Physical.

4.In the setting of curd, milk changes into new substance, curd. This is an irreversible process that means milk cannot be made from curd. Formation of new substance and irreversible process shows that setting of curd is a chemical change.

Explanation:

Answer 2

Answer:

1.physical change

2.chemical change

3.chemical change

4.chemical change