Resonance structures of propenal are given below. Which of these resonating structures is more stable ? Give reason for your answer.
`CH_(2)=underset("I")(CH-CH)=O harr underset("II")(overset(o+)(CH)_(2)-CH=CH-overset(Theta)(O))`

Explanation

To determine which resonance structure of propenal is more stable, we need to analyze the two given structures based on certain criteria. Here’s a step-by-step solution:

### Step 1: Identify the Resonance Structures
The two resonance structures of propenal are:
1. Structure I: \( \text{CH}_2= \text{C}(\text{H})-\text{CH}= \text{O} \)
2. Structure II: \( \text{C}(\text{H})_2-\text{C}=\text{C}(\text{O}^+)-\text{O}^- \)

### Step 2: Analyze Charge Separation
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