Isn't it a because in b at the start of the equation the E in Fe just disappeared
As they contain, green pigement they can perform "Photosynthesis" and obtains energy from that process
Hope this helps!
When HCl reacts with a metal, hydrogen gas will be evolved. To test this gas, insert a burning splinter into the outlet of gas, the flame will be extinguished with a pop sound. This will confirm the gas is hydrogen.
