Question

select a metal out of the following which reacts with hot water but not with cold :Iron, sodium, magnesium.

Answer 1

HEY FRIEND ✋✋

" MAGNESIUM " IS YOUR ANSWER ....

MAGNESIUM ONLY REACTS WITH HOT WATER ...

SODIUM REACTS VIGOROUSLY WITH HOT AND COLD WATER , IT MAY LEAD TO A SERIOUS ACCIDENT ALAO , DUR TO THIS REACTION...

IRON ONLY REACTS WITH STEAM.....

HOPE IT HELPS

Answer 2

Magnesium reacts with hot water and floats on the surface as hydrogen sticks on to its surface.
Mg+2(H2O)=Mg(OH)2+H2.