To analyze the statements provided in the question, we will evaluate each statement regarding the concept of entropy in thermodynamics.
### Step-by-Step Solution:
1. **Understanding Statement 1**:
- **Statement**: "Entropy of all elements is zero at zero Kelvin."
- **Analysis**: According to the third law of thermodynamics, the entropy of a perfect crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin). However, this applies specifically to pure crystalline substances. For other elements or substances, especially those that are not perfectly crystalline, this statement is not true. Therefore, **Statement 1 is false**.
2. **Understanding Statement 2**:
- **Statement**: "Standard entropy of all elements is greater than zero."
- **Analysis**: The standard entropy of a substance at 0 Kelvin is zero only for perfect crystalline solids. For all other substances, including non-crystalline solids, liquids, and gases, the standard entropy is greater than zero. However, since the statement claims "all elements," it is misleading. The statement is not universally true because it does not account for the exceptions (like perfect crystalline solids at 0 Kelvin). Therefore, **Statement 2 is also false**.
3. **Understanding Statement 3**:
- **Statement**: "Entropy of all elements and compounds decreases with decrease of temperature and becomes zero at absolute zero temperature."
- **Analysis**: This statement is partially true. Entropy does decrease with a decrease in temperature as the randomness of the system decreases. However, it becomes zero only for perfect crystalline substances at absolute zero, not for all elements and compounds. Therefore, while the first part of the statement is true, the conclusion that it becomes zero for all elements and compounds is false. Thus, **Statement 3 is false**.
### Conclusion:
- All three statements are false. Therefore, the answer is F F F (False, False, False).
