Q11 V2The infrared spectrum of cocaine is shown below. From this spectrum it may be concluded that

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Start by aligning the options with what an IR spectrum can reveal about functional groups.
Option a: 'cocaine is an alcohol' would require a strong O–H stretch around 3200–3550 cm-1. The IR spectrum shown does not display a characteristic broad O–H stretch in that region, and cocaine does not contain a free hydroxyl group typical of simple alcohols. This makes the statement unlikely.
Option b: 'cocaine does not contain any C-C single bonds' is inconsistent with the molecule's framework. Cocaine has a complex ring system and many carbon–carbon single bonds; an IR spectrum cannot prove absence of C–C bonds, and the presence of multiple peaks in the fingerprint region supports abundant C–C bonds. Therefore, this claim is incorrect.
Option c: 'cocaine does not contain C-H bonds' would be impossible for an organic molecule of this size; IR spectra routinely show C–H stretching in the 2850–3000 cm-1 region. The spectrum provided indeed shows numerous features consistent with C–H vibrations, so asserting no C–H bonds is wrong.
Option d: 'cocaine does not have the -COOH functional group' is the most consistent with cocaine’s known structure. Cocaine contains ester and amide-like functionalities, but not a carboxylic acid (-COOH). In IR, a carboxylic acid would show a broad O–H around 2500–3300 cm-1 and a distinct C=O stretch around 1700 cm-1 with characteristic patterns. The absence of these carboxylate-specific features in the spectrum supports the statement that there is no -COOH group.
Putting these together, each incorrect option clashes with basic structural knowledge or expected IR behavior, while option d aligns with the actual functional groups present in cocaine and the typical IR signatures.

Q11 V2The infrared spectrum of cocaine is shown below. From this spectrum it may be concluded that

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