Assertion: First electron affinity of all elements is positive.
Reason: Successive electron affinity of all elements is negative.

Options

A. If both assertion and reason are true annd the reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but the reason is false
D. if assertion is false but the reason is true

Answer

To solve the question, we need to analyze the assertion and reason statements one by one.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "First electron affinity of all elements is positive."
- **Analysis**: Electron affinity is defined as the energy released when an electron is added to a neutral atom in the gas phase. Generally, this process is exothermic, meaning energy is released, and thus the electron affinity values are negative for most elements. There are exceptions, such as noble gases, which have a positive or zero electron affinity because they do not readily accept electrons. Therefore, the assertion is **false**.

2. **Understanding the Reason**:
- The reason states that "Successive electron affinity of all elements is negative."
- **Analysis**: Successive electron affinity refers to the addition of electrons to an already negatively charged ion. The process of adding an electron to a negatively charged ion is generally endothermic, meaning it requires energy input, making the successive electron affinity positive. Therefore, the reason is also **false**.

3. **Conclusion**:
- Since both the assertion and the reason are false, the correct conclusion is that both statements are incorrect.

### Final Answer:
Both assertion and reason are false.