Which metal (s) can displace tin from any single displacement * O 1. nickel
2. aluminium
3. magnesium
O 4.iron
O 5. all the above
6. only 2, 3, and 4

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

let that person have a turn to speak : )

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

i think tornado but not 100%