What’s on the Identifying Organic Compounds poster
A 7-row table: Test · Positive for · Result.
Test and positive result.
- Bromine water — Alkene — Decolourises
- Sodium carbonate — Carboxylic acid — Effervescence
- 2,4-DNPH — Aldehyde or ketone — Orange precipitate
- Tollens' reagent — Aldehyde only — Silver mirror
- Fehling's — Aldehyde only — Red precipitate
- Iodoform — Methyl ketone or CH₃CH(OH)- — Yellow precipitate
- Acidified dichromate — 1° or 2° alcohol — Orange → green
2,4-DNPH identifies a carbonyl; Tollens' then distinguishes aldehyde from ketone. Use them in that order.
Questions about the Identifying Organic Compounds poster
- What’s on the Identifying Organic Compounds poster?
- A 7-row table: Test · Positive for · Result. Test and positive result. Bromine water — Alkene — Decolourises; Sodium carbonate — Carboxylic acid — Effervescence; 2,4-DNPH — Aldehyde or ketone — Orange precipitate; Tollens' reagent — Aldehyde only — Silver mirror; Fehling's — Aldehyde only — Red precipitate; Iodoform — Methyl ketone or CH₃CH(OH)- — Yellow precipitate; Acidified dichromate — 1° or 2° alcohol — Orange → green. 2,4-DNPH identifies a carbonyl; Tollens' then distinguishes aldehyde from ketone. Use them in that order.
- Who is the Identifying Organic Compounds poster for?
- Identifying Organic Compounds belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning organic can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Identifying Organic Compounds poster?
- Each test rules a group in or out. Run them in a sensible sequence. A wall chart earns its place by being glanceable from where the work is happening, so Identifying Organic Compounds belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Identifying Organic Compounds?
- Alcohols, Alkanes and Alkenes sit alongside Identifying Organic Compounds in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.AlcoholsAlkanesAlkenes
- Is the Identifying Organic Compounds poster free to download and print?
- Yes. Identifying Organic Compounds downloads as a free PDF with no account, no email and no watermark, like everything else in the Chemistry section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Identifying Organic Compounds poster print at?
- Identifying Organic Compounds is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Identifying Organic Compounds loses nothing.Printing guide
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