Question

Which one of the following is a double displacement as well as a neutralization reaction?

(1)NaOH + HCl →NaCl+H2O

(2) AgNO3 +HCl → AgCl + HNO3

(3) Mg + 2HCl →MgCl2 +H2

(4) N2 + 3H2 →2NH3​

Answer 1

Answer:

(1)NaOH + HCl →NaCl+H2O

(2) AgNO3 +HCl → AgCl + HNO3

these two are double displacement reactions

Answer 2

The correct option is 1.

• The reaction in which the exchange of the bond takes place between two chemical species is called a double displacement reaction.
• The reactions where an acid and a base react to form a salt is called the naturalisation reaction.
• Here NaOH is a base and HCl is an acid. So, they react to form salt NaCl with water so, it is a neutralisation reaction.
• In the reaction $NaOH+HCl\rightarrow NaCl+H_2O$ the exchange of the bond takes place so, it is a double displacement reaction.