Consider the following chemical equation I and II I. {\Mg}+2 {\HCl} \to {\MgCl}_2+ {\H}_2 II. {\NaOH}+ {\HCl} \to {\NaCl}+ {\H}_2 {\O} The correct statement about these equations is:

Correct Answer is : ' I ' is a displacement reaction and 'II' is double displacement reaction.

' {\I} ' is a displacement reaction and 'II' is a decomposition reaction.

' {\I} ' is a displacement reaction and 'II' is double displacement reaction.

Both ' {\I} ' and 'II' are displacement reactions.

Both 'I' and 'II' are double-displacement reactions.

CBSE Class 10 Science 2023 Outside Delhi Set 1 - Question 12

Question : 12 of 39

Marks: +1, -0

Consider the following chemical equation I and II
I.

{\Mg}+2 {\HCl} → {\MgCl}_2+ {\H}_2

II.

{\NaOH}+ {\HCl} → {\NaCl}+ {\H}_2 {\O}

The correct statement about these equations is:

Solution:

{\Mg}( {\ s})+2 {\HCl}( {\aq}) → {\MgCl}_2( {\aq})+ {\H}_2( {\g})

Magnesium, being more reactive than hydrogen, displaces it in a chloride molecule, resulting in a single displacement reaction.

{\NaOH}( {\aq})+ {\HCl}( {\aq}) → {\NaCl}( {\aq})+ {\H}_2 {\O}( {\l})

In a doubledisplacement reaction, the reactants exchange ions and form new compounds. The reaction between hydrochloric acid

( {\HCl})

and sodium hydroxide

( {\NaOH})

to form a salt

( {\NaCl})

and water

( {\HOH})

is an example of a double displacement reaction, specifically a neutralisation reaction.

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