When white phosphorus is heated with NaOH solutions, we get

Options

A. `PH_(3)`
B. `PH_(5)`
C. `NaH_(2)PO_(2)`
D. `NaH_(4)Po_(2)`

Answer

To solve the question "When white phosphorus is heated with NaOH solutions, we get?", we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are white phosphorus (P4) and sodium hydroxide (NaOH) in an aqueous solution.

**Hint:** Remember that white phosphorus is represented as P4 and is a common allotrope of phosphorus.

### Step 2: Understand the Reaction Conditions
The reaction occurs when white phosphorus is heated with sodium hydroxide solution. This indicates that we are likely dealing with a chemical reaction that involves the transformation of phosphorus.

**Hint:** Heating often facilitates reactions, especially when dealing with less reactive substances.

### Step 3: Write the Reaction
When white phosphorus (P4) reacts with sodium hydroxide (NaOH) in the presence of water, it produces phosphine (PH3) and sodium hypophosphite (NaH2PO2). The balanced reaction can be represented as:

\[ P_4 + 4 NaOH + 2 H_2O \rightarrow 2 NaH_2PO_2 + 2 PH_3 \]

**Hint:** Balancing the reaction is crucial to understanding the stoichiometry of the products formed.

### Step 4: Identify the Products
From the balanced reaction, we can see that the products formed are:
1. Phosphine (PH3)
2. Sodium hypophosphite (NaH2PO2)

**Hint:** Look for the common products formed when phosphorus reacts with bases.

### Step 5: Conclusion
Thus, when white phosphorus is heated with NaOH solution, the products are phosphine (PH3) and sodium hypophosphite (NaH2PO2).

**Final Answer:** The correct options are PH3 and NaH2PO2.

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