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Ethers contain the functional group -O- and have which general formula?
AR-OH
BR-CHO
CR-O-R
DR-COOH
Answer & Solution
Correct answer: C. R-O-R
1. Ethers are built around a single oxygen atom bonded to two carbon-containing groups, with no other functional atoms attached to that oxygen.
2. The text confirms: "Ethers are compounds that contain the functional group –O–," and "In the general formula for ethers, R—O—R, the hydrocarbon groups (R) may be the same or different."
3. R-OH is the general formula for an alcohol, and R-CHO / R-COOH describe aldehydes and carboxylic acids respectively -- all distinct from ethers.
4. So the general formula for an ether is R-O-R.
_Source: OpenStax Chemistry Ch 20 "Organic Chemistry", p.1118 §20.2 Alcohols and Ethers_
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