A: Glycinate lon is an unsymmetrical bidentate ligand
R: Glycinate ion is a conjugate base of glycine.

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, we need to analyze both the assertion (A) and the reason (R) provided:

**Assertion (A): Glycinate ion is an unsymmetrical bidentate ligand.**

**Reason (R): Glycinate ion is a conjugate base of glycine.**

### Step-by-Step Solution:

1. **Understanding the Terms:**
- **Conjugate Base:** A conjugate base is formed when an acid donates a proton (H⁺). In this case, glycine (NH₂CH₂COOH) loses a hydrogen ion from the carboxylic acid group (-COOH) to form the glycinate ion (NH₂CH₂COO⁻).
- **Bidentate Ligand:** A bidentate ligand is a ligand that can bond to a metal ion at two different sites.

2. **Analyzing Glycinate Ion:**
- The structure of glycine is NH₂CH₂COOH. When it loses a proton from the -COOH group, it becomes the glycinate ion (NH₂CH₂COO⁻).
- The glycinate ion has two donor atoms: the nitrogen atom (N) from the amine group and the oxygen atom (O) from the carboxylate group.

3. **Determining Unsymmetrical Nature:**
- The term "unsymmetrical" indicates that the two donor atoms are different. In the case of glycinate, the donor atoms are nitrogen and oxygen, which are indeed different. This confirms that glycinate is an unsymmetrical bidentate ligand.

4. **Evaluating the Assertion:**
- Since glycinate ion has two different donor atoms (N and O), it is correctly classified as an unsymmetrical bidentate ligand.

5. **Evaluating the Reason:**
- The reason states that glycinate ion is a conjugate base of glycine, which is correct. However, the reason does not explain why glycinate is an unsymmetrical bidentate ligand. The unsymmetrical nature arises from the different donor atoms, not solely because it is the conjugate base.

6. **Conclusion:**
- Both the assertion and the reason are correct statements, but the reason does not serve as a correct explanation for the assertion. Therefore, the correct conclusion is that both A and R are true, but R is not the correct explanation for A.

### Final Answer:
Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.