Question

why does zinc react with dilute sulphuric acid to give hydrogen gas but copper does not

Answer 1

HELLO USER!

Here's your answer:

First of all, let me tell you about the Reactivity series of Metals:

K
Na
Ca
Mg
Al
Zn
Fe
Ni
Sn
Pb
H
Cu
Hg
Ag
Au
Pt


Now, the metals above Hydrogen can displace Hydrogen gas from Dilute acids. Note that Copper is a metal which is placed below Hydrogen in the Metallic Reactivity series, hence, it does not react with any dilute acid to give Hydrogen gas.

On the other hand, Zinc is a quite active metal, and is placed above Hydrogen in the Activity series, so it reacts with dilute acids to form Hydrogen gas.


Tests for Hydrogen gas:
1. It burns with a pale blue flame in air.

2. When a glowing matchstick is brought near it, it goes off with a pop sound.

3. It forms tiny droplets of water when exposed to air.



HOPE MY ANSWER IS SATISFACTORY....
THANKS!

Answer 2

Now, the metals above Hydrogen can displace Hydrogen gas from Dilute acids. Note that Copper is a metal which is placed below Hydrogen in the Metallic Reactivity series, hence, it does not react with any dilute acid to give Hydrogen gas.

On the other hand, Zinc is a quite active metal, and is placed above Hydrogen in the Activity series, so it reacts with dilute acids to form Hydrogen gas.

Tests for Hydrogen gas:

1. It burns with a pale blue flame in air.

2. When a glowing matchstick is brought near it, it goes off with a pop sound.

3. It forms tiny droplets of water when exposed to air.

HOPE MY ANSWER IS SATISFACTORY....

THANKS!