Question

METAL Dil Hd METAL SALT GAS Which of the following two combinations are correct? Metal Copper Iron Magnesium Zinc Gas Evolved Yes Yes No Yes 4 and to e and in C i and in Di and iv ​

Answer 1

Answer:

metal are good condition

Answer 2

According to the reactivity series the metal placed above hydrogen can displace hydrogen from acids.

The metals above are more reactive than that placed below.

So ,As copper is placed below hydrogen it will be unable to displace hydrogen from acid and hence will not release any gas.

Reactivity series is given in the attachment below.