In the following questions a statement of assertion (A) is followed by a statement of reason ( R)
A : Electron affinity of oxygen is higher than suiphur.
R : Number of valence orbitals containing electrons are different.

Options

A. If Both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1) .
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)
C. If Assertion is true statement but Reason is false then mark (3)
D. If both Assertion and Reason are false statements then mark (4)

Answer

To solve the question regarding the assertion (A) and reason (R) statements, we will analyze both statements step by step.

### Step 1: Analyze the Assertion (A)
**Assertion:** Electron affinity of oxygen is higher than sulfur.

- **Definition of Electron Affinity:** Electron affinity is the energy change that occurs when an electron is added to a neutral atom to form a negative ion. A higher electron affinity means that the atom has a greater tendency to accept an electron.

- **Comparison of Oxygen and Sulfur:**
- Oxygen (O) has an atomic number of 8 and is located in period 2 of the periodic table.
- Sulfur (S) has an atomic number of 16 and is located in period 3.

- **General Trend:** As we move down a group in the periodic table, the electron affinity generally decreases due to increased atomic size and electron shielding, which reduces the effective nuclear charge experienced by the added electron.

- **Conclusion for Assertion:** Since sulfur is below oxygen in the periodic table, it is expected that the electron affinity of sulfur would be higher than that of oxygen. Therefore, the assertion that the electron affinity of oxygen is higher than that of sulfur is **false**.

### Step 2: Analyze the Reason (R)
**Reason:** Number of valence orbitals containing electrons are different.

- **Valence Electrons in Oxygen and Sulfur:**
- Oxygen has the electronic configuration of 1s² 2s² 2p⁴, which means it has 6 valence electrons (2 in the s orbital and 4 in the p orbital).
- Sulfur has the electronic configuration of 1s² 2s² 2p⁶ 3s² 3p⁴, which also means it has 6 valence electrons (2 in the 3s orbital and 4 in the 3p orbital).

- **Conclusion for Reason:** The number of valence electrons in both oxygen and sulfur is the same (6). Therefore, the statement that the number of valence orbitals containing electrons are different is **false**.

### Final Conclusion
Both the assertion (A) and the reason (R) are false. Therefore, the correct option is that both statements are false.