Classify each of the following reactions as combination, decomposition, displacement or double displacement reactions :
`Ni(NO_(3))_(2(aq))+2NaOH_((aq))toNi(OH)_(2)darr+2NaNO_(3(aq))`

Explanation

To classify the given reaction `Ni(NO₃)₂(aq) + 2NaOH(aq) → Ni(OH)₂(s) + 2NaNO₃(aq)`, we will analyze the components and the nature of the reaction step by step.

### Step 1: Identify the Reactants and Products
The reactants in this reaction are Nickel(II) nitrate, `Ni(NO₃)₂`, and Sodium hydroxide, `NaOH`. The products formed are Nickel(II) hydroxide, `Ni(OH)₂`, and Sodium nitrate, `NaNO₃`.

### Step 2: Determine the Type of Reaction
Next, we need to classify the type of reaction based on the definitions of different reaction types:

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