Question

Give reasons


Why is rusting considered as non desirable change

Why solids become rigid ?

Is air matter. justify your answer .​

Answer 1

Answer:

Rusting changes the chemical properties of iron making it weak and of less use so it is considered a non desirable change .

Solids have large intermolecular force and compact structure that's why they are rigid .

Yes air is matter because according to basic definition of matter , matter is anything occupying space and volume and we know that air occupies both so it's matter .

Answer 2

Answer:

1. Rusting washes away the layer of metal and and it makes it weak thus losing its strength and durability. Hence it is non desirable change
2. Solids have Molecules closely packed and intermolecular forces between them are strong making them rigid.
3. Yes Air is the gaseous state of matter .It has volume and occupies space