Assertion : `K_(2)CrO_(4)` has yellow colour due to charge transfer.
Reason : `CrO_(4)^(2-)` ion is tetrahedral in shape.

Options

A. Statement-1 is true , Statement-2 is true and Statement-2 is correct explanation for Statement-1
B. Statement-1 is true, Statement-2 is True and Statement-2 is Not correct explanation for statement-1
C. Statement-1 is true, Statement-2 is False
D. Statement-1 is False, Statement-2 is True

Answer

To solve the question regarding the assertion and reason about \( K_2CrO_4 \), we will analyze both statements step by step.

### Step 1: Analyze the Assertion
**Assertion:** \( K_2CrO_4 \) has a yellow color due to charge transfer.

- **Explanation:** \( K_2CrO_4 \) (potassium chromate) is known to exhibit a yellow color. This color is primarily due to the charge transfer process rather than d-d transitions. In \( CrO_4^{2-} \), chromium is in the +6 oxidation state, which means it has an electronic configuration of \( Ar \, 3d^0 \). Since there are no unpaired electrons in the d-orbitals, d-d transitions cannot occur. Instead, the yellow color arises from the transfer of charge from the ligand (oxygen) to the metal (chromium), which is known as ligand-to-metal charge transfer (LMCT).

### Step 2: Analyze the Reason
**Reason:** \( CrO_4^{2-} \) ion is tetrahedral in shape.

- **Explanation:** The \( CrO_4^{2-} \) ion indeed has a tetrahedral geometry. In this ion, chromium has a +6 oxidation state and forms four bonds with oxygen atoms. The steric number is 4 (four bond pairs and no lone pairs), which corresponds to sp³ hybridization, leading to a tetrahedral shape.

### Step 3: Conclusion
- Both the assertion and the reason are true statements.
- However, the reason provided (the tetrahedral shape of \( CrO_4^{2-} \)) does not explain the assertion (the yellow color due to charge transfer). The color is due to charge transfer and not due to the geometry of the ion.

### Final Answer
- The correct option is that both statements are true, but the reason is not the correct explanation for the assertion.

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