Question

Reaction of zinc with cold and very dil. HNO₃ gives

(a) \(Zn(NO _3 ) _2 + N_{2}O \)

(b) \(Zn(NO _3 ) _2 + NO \)

(c) \(Zn(NO _3 ) _2 + NH_{4}NO_{3} \)

(d) \(Zn(NO_ 3 ) _2 + NO_{2}\)

Answer 1

Correct option is (c) \(Zn(NO _3 ) _2 + NH_{4}NO_{3} \)

The reaction of zinc with cold and dilute nitric acid, we will follow these steps:

Identify the Reactants

The reactants in this reaction are:

Zinc (Zn)

Cold and dilute nitric acid (HNO₃)

Write the Reaction

When zinc reacts with cold and dilute nitric acid, it undergoes a redox reaction. The nitric acid acts as an oxidizing agent. 

The balanced chemical equation for this reaction can be written as:

Zn + 4HNO₃ → Zn(NO₃)₂ + NH₄NO₃ + 2H₂O

Identify the Products

From the balanced equation, we can identify the products formed:

Zinc nitrate (Zn(NO₃)₂)

Ammonium nitrate (NH₄NO₃)

Water (H₂O)

Conclusion

Thus, the reaction of zinc with cold and dilute nitric acid yields:

Zinc nitrate (Zn(NO₃)₂)

Ammonium nitrate (NH₄NO₃)

Water (H₂O)