Respuesta :
Answer: The correct statement is a single replacement reaction takes place because zinc is more reactive than hydrogen.
Explanation:
A single displacement reaction is defined as the chemical reaction in which a more reactive metal displaces a less reactive metal from its chemical reaction. The reactivity of metals is determined from the series known as reactivity series.
The metals which lie above in the reactivity series are more reactive than the metals which lie below in the series. General equation for these reactions is given as:
[tex]A+BC\rightarrow AC+B[/tex]
where, A is more reactive metal than metal B.
Now, when zinc metal reacts with hydrochloric acid, it leads to the production of zinc chloride salt and hydrogen gas. The equation follows:
[tex]Zn(s)+2HCl(aq.)\rightarrow ZnCl_2(s)+H_2(g)[/tex]
Here, zinc is more reactive metal than hydrogen because it lies above in the series.
The correct statement is a single replacement reaction takes place because zinc is more reactive than hydrogen. Hence, option C is correct.
What is a chemical equation?
A chemical reaction is a representation of symbols of the elements to indicate the number of substances and moles of reactant and product.
A single replacement reaction takes place because zinc is more reactive than hydrogen.
Reaction
Zn+2HCl ⇒ ZnCl₂ + H₂
If we look at this reaction, the elements that play a role are those that undergo a redox reaction
Oxidation : Zn⇒Zn²⁺ + 2e
Reduction : 2H⁺ + 2e ⇒H₂
So Zn (located on the left) can push H (the element on the right) in the redox reaction ⇒ Zn is more reactive
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds.
A+BC⇒AC+B
So the above reaction involves the elements Zn and H which undergo a redox reaction and are included in a single replacement.
Hence, option C is correct.
Learn more about chemical equations:
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