When Zn reacts with conc `HNO_(3),then Zn(NO_(3))_2 and NO_(2)` are formed , the reaction (s) involved in this process is/are

Options

A. Redox reaction
B. Acid base reaction
C. Ion exchange reaction
D. None

Answer

To analyze the reaction between zinc (Zn) and concentrated nitric acid (HNO3), we can break down the process step by step.

### Step 1: Identify the Reactants and Products
The reactants in this reaction are:
- Zinc (Zn)
- Concentrated Nitric Acid (HNO3)

The products formed are:
- Zinc Nitrate (Zn(NO3)2)
- Nitrogen Dioxide (NO2)
- Water (H2O)

### Step 2: Write the Balanced Chemical Equation
The unbalanced chemical equation for the reaction is:
\[ \text{Zn} + \text{HNO}_3 \rightarrow \text{Zn(NO}_3\text{)}_2 + \text{NO}_2 + \text{H}_2\text{O} \]

To balance the equation, we find the coefficients that make the number of atoms of each element equal on both sides. The balanced equation is:
\[ 4 \text{HNO}_3 + \text{Zn} \rightarrow \text{Zn(NO}_3\text{)}_2 + 2 \text{NO}_2 + 2 \text{H}_2\text{O} \]

### Step 3: Identify the Type of Reaction
This reaction can be classified as:
1. **Redox Reaction**: Zinc is oxidized from an oxidation state of 0 to +2, while nitrogen in nitric acid is reduced from +5 in HNO3 to +4 in NO2.
2. **Acid-Base Reaction**: HNO3 acts as an acid, and the reaction produces a salt (Zn(NO3)2) and water (H2O).

### Step 4: Conclusion
The reaction between zinc and concentrated nitric acid is both a redox reaction and an acid-base reaction. Therefore, the correct options are:
- Redox Reaction
- Acid-Base Reaction

### Final Answer
The reaction involved in this process is:
- Redox Reaction
- Acid-Base Reaction