Statement-1: Reaction of disodium hydrogen phosphate with magnesium sulphate in presence of ammonium hydroxide gives a white crystalline precipitate.
Statement-2:Insoluble magnesium ammonium phosphate is formed.

Options

A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1
B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1
C. Statement-1 is True, Statement-2 is False.
D. Statement-1 is False, Statement-2 is True.

Explanation

To solve the question regarding the two statements about the reaction of disodium hydrogen phosphate with magnesium sulfate in the presence of ammonium hydroxide, we will analyze each statement step by step.

### Step 1: Identify the Reactants
The reactants in the reaction are:
- Disodium hydrogen phosphate (Na2HPO4)
- Magnesium sulfate (MgSO4)
- Ammonium hydroxide (NH4OH)

### Step 2: Write the Chemical Reaction
When these reactants are mixed, they undergo a double displacement reaction. The balanced chemical reaction can be written as:
\[ \text{Na}_2\text{HPO}_4 + \text{MgSO}_4 + \text{2NH}_4\text{OH} \rightarrow \text{MgNH}_4\text{PO}_4 \downarrow + \text{Na}_2\text{SO}_4 + 2\text{H}_2\text{O} \]

### Step 3: Identify the Products
From the reaction, we can see that the products formed are:
- Magnesium ammonium phosphate (MgNH4PO4), which precipitates out as a white crystalline solid.
- Sodium sulfate (Na2SO4)
- Water (H2O)

### Step 4: Analyze Statement 1
**Statement 1:** "Reaction of disodium hydrogen phosphate with magnesium sulfate in presence of ammonium hydroxide gives a white crystalline precipitate."
- This statement is **true** because the product magnesium ammonium phosphate (MgNH4PO4) is indeed a white crystalline precipitate.

### Step 5: Analyze Statement 2
**Statement 2:** "Insoluble magnesium ammonium phosphate is formed."
- This statement is also **true** because magnesium ammonium phosphate is known to be insoluble in water.

### Step 6: Determine the Relationship Between the Statements
- Statement 2 provides a correct explanation for Statement 1, as it identifies the specific precipitate formed in the reaction described in Statement 1.

### Conclusion
Both statements are true, and Statement 2 is the correct explanation for Statement 1.

### Final Answer
- Statement 1: True
- Statement 2: True
- Statement 2 is the correct explanation for Statement 1.

---