What is formed when zinc reacts with sodium hydroxide?a)Zinc hydroxide and sodiumb)Sodium zincate and hydrogen gasc)Sodium zinc-oxide and hydrogen gasd)Sodium zincate and waterCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Option b is correct. Because, this can be prove with an experiment. See, let this experiment named it as 'REACTION OF BASES WITH METALS' as the Zinc is metal and Sodium Hydroxide is base.

Experiment :-

Take few pieces of Zinc granules (or Zinc metal piece) in test tube and add 2ml of NaOH (Sodium Hydroxide) and warm the mixture which releases Hydrogen gas (H2) and metallic salt.

See this belowed chemical equation, to show that Reaction of base (NaOH) with metal (Zn).

2NaOH (base) + Zn (Metal) ==> Na2ZnO2 (Metallic salt) + H2↑ (Hydrogen gas).

[Metal oxide (base) + Metal ==> Salt + Hydrogen]

Note:- Metallic salt formation is not possible with all metals.

Answer

Zinc is amphoteric in nature, i.e, it reacts with both acids and bases.
Zn + NaOH → NaZnO2 + H2
Zn + HCL → ZnCl2 + H2

Answer

Option [b] as---->

2NaOH (sodium hydroxide)+Zn (zinc)⟶Na2ZnO2(sodium zincate) +H2(hydrogen gas)

Answer

Zinc is a transition metal which shows moderate reactivity. Zinc reacts with NaOH to form sodium zincate with the evolution of hydrogen gas.

Answer

Zinc react with excess sodium hydroxide to form sodium zincate(Na2ZnO2) along with hydrogen gas.

Answer

When zinc reacts with sodium hydroxide, the following reaction takes place:

Zn + 2NaOH → Na2ZnO2 + H2

Explanation:
1. Reactants:
- Zinc (Zn): A metallic element with the atomic number 30.
- Sodium hydroxide (NaOH): A strong base commonly known as caustic soda.

2. Reaction:
When zinc reacts with sodium hydroxide, the zinc displaces hydrogen from the hydroxide ion. This displacement reaction is known as a redox reaction. The zinc atom loses two electrons and is oxidized, while the hydroxide ion gains those electrons and is reduced. The overall reaction is as follows:

Zn + 2NaOH → Na2ZnO2 + H2

3. Products:
- Sodium zincate (Na2ZnO2): This is the main product of the reaction. It is an ionic compound formed by the combination of sodium ions (Na+) and the zincate ion (ZnO2^2-).
- Hydrogen gas (H2): This is a byproduct of the reaction. It is released as a gas.

4. Explanation of Option B:
Option B states that the reaction between zinc and sodium hydroxide forms sodium zincate and hydrogen gas. This is the correct answer because it accurately describes the products formed during the reaction.

In summary, when zinc reacts with sodium hydroxide, sodium zincate and hydrogen gas are formed. The reaction can be represented by the equation: Zn + 2NaOH → Na2ZnO2 + H2.

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