4-carbon chain, C=C at position 2, -CHO suffix: But-2-enal
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BITSAT 2025 — Chemistry Organic Chemistry
medium
mcq
2025
Official previous-year question
Verified 30 May 2026.
Question
The IUPAC name of CH₃-CH=CH-CHO is:
Options
- A
But-2-enal
- B
But-3-enal
- C
Butenal
- D
2-Butenal
Solution
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