Which one is correct statement for zeolite ?

Options

A. They are alumino silicates
B. Hydrated zeolites are used as ion exchangers in hardening of soft water
C. ZSM - 5 is used to convert gasoline to alcohol
D. All of these

Answer

To determine which statement about zeolites is correct, let's analyze each option step by step.

### Step 1: Understand what zeolites are
Zeolites are crystalline solids that are primarily composed of silicon (Si), aluminum (Al), and oxygen (O). They have a unique structure that allows them to form cavities and channels, making them useful in various applications, including ion exchange and catalysis.

**Hint:** Remember that zeolites are primarily made of silicon, aluminum, and oxygen, which gives them their unique properties.

### Step 2: Evaluate the first statement
1. **They are Aluminum Silicate.**
- This statement is correct. Zeolites can be classified as aluminum silicates because they contain both aluminum and silicon in their structure.

**Hint:** Focus on the composition of zeolites to assess the validity of this statement.

### Step 3: Evaluate the second statement
2. **Hydrated Zeolites are used as ion exchangers in hardening of salt water.**
- This statement is incorrect. While zeolites can act as ion exchangers, they are typically used in water softening processes rather than hardening salt water.

**Hint:** Consider the common uses of zeolites in water treatment processes to determine the accuracy of this statement.

### Step 4: Evaluate the third statement
3. **ZSM-5 is used to convert gasoline to alcohol.**
- This statement is misleading. ZSM-5 is a type of zeolite that is primarily used in catalytic processes, including the conversion of alcohols to gasoline rather than the other way around.

**Hint:** Research the specific applications of ZSM-5 to clarify its role in chemical processes.

### Step 5: Evaluate the fourth statement
4. **All of these.**
- Since not all previous statements are correct, this statement is also incorrect.

**Hint:** If any of the previous statements are false, then this collective statement cannot be true.

### Conclusion
After evaluating all the statements, the only correct statement is the first one: **They are Aluminum Silicate.**

### Final Answer
The correct statement for zeolites is: **1. They are Aluminum Silicate.**