The law which does not follow from Dalton’s atomic theory is……………

Answer

To solve the question regarding which law does not follow from Dalton's atomic theory, we need to analyze the key points of Dalton's atomic theory and compare them with various gas laws.

### Step-by-Step Solution:

1. **Understanding Dalton's Atomic Theory**:
- Dalton's atomic theory states that:
- All matter is made up of atoms, which are indivisible and indestructible.
- Atoms of a given element are identical in size, mass, and other properties.
- Atoms of different elements have different masses and properties.
- Compounds are formed when atoms of different elements combine in fixed ratios.
- Chemical reactions involve the rearrangement of atoms.

2. **Identifying Relevant Gas Laws**:
- **Gay-Lussac's Law**: This law states that the pressure of a gas is directly proportional to its absolute temperature when the volume is held constant. It also implies that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules.
- **Avogadro's Law**: This law states that equal volumes of gases, at the same temperature and pressure, contain equal numbers of molecules, regardless of the type of gas.

3. **Analyzing the Conflict**:
- According to Dalton, atoms of different elements are assumed to have different masses, which could lead to different volumes if the number of moles is not considered.
- Gay-Lussac's law and Avogadro's law suggest that gases behave uniformly under certain conditions, which contradicts Dalton's assertion that atoms of different elements have different masses and may occupy different volumes.

4. **Conclusion**:
- The law that does not follow from Dalton’s atomic theory is **Gay-Lussac's Law**. This is because Dalton's theory does not account for the equal volumes of gases containing equal numbers of molecules, which is a fundamental aspect of Gay-Lussac's law.

### Final Answer:
The law which does not follow from Dalton’s atomic theory is **Gay-Lussac's Law**.

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