Non - Metals cannot displace hydrogen from dilute sulphuric acid?why?

Question

Answer

Non metal itself electron acceptor , it cannot give electron to displace hydrogen from sulphuric acid.

Answer

Answer

Non-Metals cannot displace hydrogen from dilute sulphuric acid due to the following reasons:

Lack of Electropositivity:
- Non-metals generally have high electronegativity, meaning they have a strong tendency to attract electrons towards themselves.
- On the other hand, metals have low electronegativity and high electropositivity, which allows them to easily donate electrons and form positive ions.
- In order to displace hydrogen from dilute sulphuric acid, the element needs to be capable of donating electrons to form positive ions. Non-metals lack this property, making it difficult for them to displace hydrogen.

Unreactive with Acid:
- Non-metals are generally unreactive with acids, including dilute sulphuric acid.
- This is because non-metals do not possess the necessary properties to react with acids and displace hydrogen.
- In contrast, metals readily react with acids to form metal salts and release hydrogen gas.

Acid-Base Reactions:
- The reaction of non-metals with dilute sulphuric acid is generally an acid-base reaction, rather than a displacement reaction.
- Non-metals such as carbon, sulfur, and phosphorous react with dilute sulphuric acid to form carbon dioxide, sulfur dioxide, and phosphorous pentoxide, respectively.
- These reactions involve the non-metal reacting with the acid to form a new compound, rather than displacing hydrogen.

Formation of Non-metal Oxides:
- Non-metals tend to form oxides when they react with oxygen.
- When non-metals react with dilute sulphuric acid, they produce non-metal oxides instead of displacing hydrogen.
- These non-metal oxides can further react with water to form acidic solutions.

Examples:
- Carbon reacts with dilute sulphuric acid to form carbon dioxide gas:
C(s) + H2SO4(aq) → CO2(g) + H2O(l)
- Sulfur reacts with dilute sulphuric acid to form sulfur dioxide gas:
S(s) + H2SO4(aq) → SO2(g) + H2O(l)
- Phosphorous reacts with dilute sulphuric acid to form phosphorous pentoxide:
P(s) + 2H2SO4(aq) → P4O10(s) + 2H2O(l)

In conclusion, non-metals cannot displace hydrogen from dilute sulphuric acid due to their lack of electropositivity, unreactivity with acid, and the tendency to form non-metal oxides instead. These elements typically undergo acid-base reactions with the acid, forming new compounds rather than displacing hydrogen.

Answer

Cu, Au, Ag and Pt are metals which can't displace hydrogen from an acid. The reason for such a property is that these metals are placed lower in than hydrogen in the reactivity series. Since, they are less reactive than hydrogen, they cannot displace hydrogen from its compound.

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