Which of the following are neutralization reactions?

​$$(i) NaOH(aq)+HCl(aq)→NaCl(aq)+H_2 O(1)$$​​

(ii) $$HNO_3 (aq) +KOH (aq) →KNO_3 (aq) +H_2O (1)$$​​

(iii) $$HCl(aq)+NaOH(aq)→NaCl(aq)+H_2 O(1))$$​

Correct option is D

Sol: The correct answer is (d) (i), (ii), and (iii)

Key Points:

A neutralization reaction occurs when an acid reacts with a base to produce a salt and water.

1. $$NaOH (aq) + HCl (aq) → NaCl (aq) + H_2O (l)$$

• Sodium hydroxide (NaOH) is a base.
• Hydrochloric acid (HCl) is an acid.
• This reaction produces sodium chloride (NaCl) and water $$(H _2 O).$$​​
• This is a neutralization reaction.
  

2. $$HNO_3 (aq) + KOH (aq) → KNO_3 (aq) + H_2O (l)$$

• ​​Nitric acid $$(HNO_3 )$$​ is an acid.
• Potassium hydroxide (KOH) is a base.
• This reaction produces potassium nitrate $$(KNO _3 )$$​ And water $$(H_2 O)$$​.
• This is a neutralization reaction.

3. $$HCl (aq) + NaOH (aq) → NaCl (aq) + H_2O (l)$$

• Hydrochloric acid (HCl) is an acid.
• Sodium hydroxide (NaOH) is a base.
• This reaction produces sodium chloride (NaCl) and water $$(H_2 O)$$​.
• This is a neutralization reaction.

All the given reactions (i), (ii), and (iii) are neutralization reactions.