Question

You are given the following materials marble chips,hydrochloric acid,zinc granoles.idendify the type of reaction when marble chips and zinc granoles are added separetly to acid taken ivn two test tubes.

Answer 1

Marble is nothing but calcium carbonate
CaCO3 + HCl gives CaCl2 + H20 + CO2 = redox reaction
Zn + 2HCl gives ZnCl2 + H2 = Displacement reaction

Answer 2

Answer :

(1) $CaCO_3+HCl\rightarrow CaCl_2+H_2O+CO_2$ this reaction is a neutralization reaction.

(2) $Zn+2HCl\rightarrow  ZnCl_2+H_2$ this reaction is a single displacement reaction.

Explanation :

As we know that the marble is a calcium carbonate. When calcium carbonate react with hydrochloric acid then it gives calcium chloride, water and carbon dioxide as products.

The balanced chemical reaction will be,

$CaCO_3+HCl\rightarrow CaCl_2+H_2O+CO_2$

This reaction is a neutralization reaction in which an acid react with a base to give salt, water and carbon dioxide as a product.

When zinc granules react with hydrochloric acid then it gives zinc chloride and hydrogen gas as products.

The balanced chemical reaction will be,

$Zn+2HCl\rightarrow  ZnCl_2+H_2$

This reaction is a single displacement reaction in which the most reactive metal displaces the least reactive metal.