Choose the incorrect option (s):

Options

A. Picric acid & Benzoic acid can be distringuished by `NaHCO_(3)`
B. `lt` rate of `S_(N)2` reaction
C. `+underset((1eq.))(CH_(3)MgIoverset("ether")to`
D.
does't show tautomerism.

Answer

To solve the problem of identifying the incorrect options among the given statements, let's analyze each statement step by step.

### Step 1: Analyze Option A
**Statement:** Picric acid and benzoic acid can be distinguished by NaHCO3.

**Analysis:**
- Picric acid (2,4,6-trinitrophenol) is a stronger acid than benzoic acid due to the presence of three nitro groups that stabilize the negative charge on the conjugate base.
- When both acids react with NaHCO3, they will both release CO2 gas, indicating that both are acidic and can react with bicarbonate.
- Therefore, this statement is **correct** because they cannot be distinguished by NaHCO3.

### Step 2: Analyze Option B
**Statement:** The first compound is less reactive than the second compound in the context of SN2 reactions.

**Analysis:**
- In SN2 reactions, steric hindrance plays a crucial role. The more crowded the carbon atom is, the slower the reaction will be.
- If the first compound is more crowded than the second, it will indeed be less reactive in SN2 reactions.
- Thus, this statement is also **correct**.

### Step 3: Analyze Option C
**Statement:** The reaction of this compound with one equivalent of Grignard reagent CH3MgI will yield a product.

**Analysis:**
- Grignard reagents react with acidic hydrogens to form alkanes. If the compound has an acidic hydrogen (like in alcohols or carboxylic acids), it will react to form methane.
- If the statement implies that no product is formed, it is incorrect because the reaction will yield methane.
- Therefore, this statement is **incorrect**.

### Step 4: Analyze Option D
**Statement:** This particular compound will not show tautomerism.

**Analysis:**
- Tautomerism is a phenomenon where compounds can exist in two interconvertible forms, typically involving the migration of a hydrogen atom and a switch between single and double bonds.
- Many compounds, especially those with keto-enol forms, can exhibit tautomerism.
- If the compound in question can indeed show tautomerism, then this statement is **incorrect**.

### Conclusion
The incorrect statements are:
- **Option C**: The reaction of this compound with one equivalent of Grignard reagent CH3MgI will yield a product (incorrect because it will yield methane).
- **Option D**: This particular compound will not show tautomerism (incorrect if the compound can show tautomerism).

### Final Answer
The incorrect options are **C and D**.