Why magnets attract iron but do not attract paper ?

answer:

magnets don't attract only those metals. magnetism occurs when a large number of electrons with parallel spins occur within a crystal. the atoms of any element which has electrons with parallel spins behave like a magnet. magnetic interaction can be observed in substances which are either ferromagnetic or paramagnetic.

here's the link to your question!

explanation:

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e