Which is incorrect statement about silicones ?

Options

A. They are made up of `SiO_(4)^(4-)` units
B. They are polymers made up of `R_(2)SiO` units
C. They are water soluble compounds
D. They are hydrophilic in nature

Explanation

To determine which statement about silicones is incorrect, we need to analyze the properties and structure of silicones. Here’s a step-by-step solution:

### Step 1: Understand the Structure of Silicones
Silicones are polymers that consist of a repeating unit. The basic repeating monomeric unit of silicones can be represented as R2SiO, where R represents alkyl groups.

**Hint:** Remember that silicones are polymers made up of a specific repeating unit that includes silicon and oxygen.

### Step 2: Identify the Components of the Monomeric Unit
In the monomeric unit R2SiO:
- The "R" groups are typically alkyl groups (like methyl, ethyl, etc.).
- The silicon (Si) atom is bonded to two alkyl groups and one oxygen (O) atom.

**Hint:** Focus on the composition of the monomeric unit to understand what silicones are made of.

### Step 3: Analyze the Given Options
We need to evaluate the statements provided in the options to identify which one is incorrect.

1. **Option 1:** Silicones are made up of SiO4, four negative units.
2. **Option 2:** Silicones are polymers made up of R2SiO units.
3. **Option 3:** Silicones are water-soluble compounds.
4. **Option 4:** Silicones are hydrophilic in nature.

**Hint:** Compare each option against the known properties and structure of silicones.

### Step 4: Evaluate Each Option
- **Option 1:** This statement is incorrect. Silicones are not made up of SiO4 units; that structure refers to silicates, which have a tetrahedral structure. Silicones consist of R2SiO units.
- **Option 2:** This statement is correct as it accurately describes the structure of silicones.
- **Option 3:** This statement is correct; silicones can be water-soluble.
- **Option 4:** This statement is also correct; silicones are hydrophilic.

**Hint:** Identify which option does not align with the established facts about silicones.

### Step 5: Conclusion
Based on the analysis, the incorrect statement about silicones is **Option 1**, which claims that silicones are made up of SiO4, four negative units. This is a characteristic of silicates, not silicones.

**Final Answer:** The incorrect statement about silicones is **Option 1: Silicones are made up of SiO4, four negative units.**