Which does not react with dilute hydrochloric acid?CopperZincIronMercury (2024)

FAQs

Which does not react with dilute hydrochloric acid? ›

Copper: Acid that has a very low concentration because it contains a lot of water is referred to as diluted acid. Due to copper's lower activity in the activity series, this metal won't react with dilute hydrochloric acid.

in case of copper Copper is below hydrogen in the reactivity series. This means that copper is less reactive than hydrogen and hence cannot displace it from the acidic solution. so, this is the reason copper does not react with hydrochloric acid. Q.

As a result, copper, silver and mercury cannot react with the dilute acid as they won't displace the hydrogen from non-metal anion. Hence, Option D is correct.

Detailed Solution

Gold (Au) is one of the least reactive elements on the Periodic Table. As it is placed at lowest in the reactivity series. So, because of this reason, gold does not react with acid.

All the metals react with dilute hydrochloric acid to give bubbles of hydrogen and a colourless solution of the metal chloride. As you might expect for elements in this part of the Periodic Table, the reactions get more vigorous as you go down the Group.

Certain metals like Aluminium, magnesium and Zinc are highly reactive and they produce hydrogen gas with hydrochloric acid.

Copper is present below hydrogen in the reactivity series of metals. So it does not react with dilute acids like hydrochloric acid or sulfuric acid.

When dilute HCl is added to a small amount of copper oxide in a beaker, a greenish-yellow gas is released and a bluish-green solution is formed. Since the metal oxides such as a Copper oxide (CuO) are basic in nature, it reacts with acids such as HCl to form the corresponding salt and water.

Hydrochloric acid reacts with Magnesium to form Magnesium Chloride and release Hydrogen gas. The unbalanced chemical equation can be written as: Mg ( s ) + HCl ( aq ) → MgCl 2 ( aq ) + H 2 ( g ) Magesium Hydrochloric Magnesium Acid Chloride.

Thus, Cu is below hydrogen and can't displace it. Therefore, no reaction would take place between Cu and HCl.

What does not react with water or dilute acid? ›

However, metals like mercury, copper, silver and gold do not react with dilute acids. Thus, when zinc reacts with dilute hydrochloric acid, zinc chloride and hydrogen gas is formed. Which metal is not reactive with acid and water? Gold, Silver and Platinum are not reactive with acid and water.

Least Reactive Metals

Metals such as silver, gold, and platinum are unreactive with water and acids and are considered inert.

Noble gases are also called as inert gases, which do not react chemically with other elements. The noble gases are helium, neon, argon, krypton, xenon and radon.

Therefore, gold and copper will not react with dilute hydrochloric acid while zinc and magnesium will react that will result in the formation of respective metal salts along with the evolution of hydrogen gas.

Final answer: Pyrite (C) is the correct mineral, as it matches the description of having a metallic luster, a hardness of 6, and it does not react with hydrochloric acid.

Nonmetallic materials are generally preferred for handling and storing HCl. Plastics, such as polyethylene, polypropylene, polyvinyl chloride are resistant, but are limited to ambient temperatures. Fiberglass-reinforced plastic (FRP) is also resistant and has been generally used for the storage and transportation.

Carbon being non-metallic has a tendency to accept electrons. It is not able to displace hydrogen present in acid. Thus, it does not react with dilute hydrochloric acid.

Potassium and sodium are placed at the top of the reactivity series. They are highly reactive towards dilute sulphuric or hydrochloric acid. They react violently with dilute acids and cause explosions.