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- 1. Multiple ChoiceThe infrared spectrum was obtained from a compound and showed absorptions at 2100 cm-1,
1700 cm-1, and 1200 cm-1. Identify the compound.CH3COOCH3C6H5COOHCH2=CHCH2OHCH≡CCH2CO2CH3 - 2. Multiple ChoiceA molecule absorbs IR at a wavenumber of 1720 cm-1. Which functional group could account for this absorption.
I. aldehydes
II. esters
III. ethersI onlyI and III, II and IIInone of the above - 3. Multiple ChoiceIdentify the bonds which will produce strong absorptions in the IR region of the electromagnetic spectrum.
I. C-O bond
II. C=C bond
III. C=O bondI and II onlyI and III onlyII and III onlyI, II and III - 4. Multiple ChoiceWhat part of the atom or molecule does infrared radiation affectthe nucleusthe electronsthe bondsthe charge
- 5. Multiple ChoiceThe independent variable on an IR spectra iswave lengthwave numberfrequency squaredtransmission
- 6. Multiple ChoiceThe dependent variable on an IR spectra iswave lengthwave numberfrequencytransmission
- 7. Multiple ChoiceThe greater the polarity of a bond the_______________its IR absorptionweakerstrongermore chargedsmaller the wavenumber
- 8. Multiple ChoiceNon polar symmetrical moleculesdo not absorb IR radiationabsorb IR radiationabsorb the most IR radiationtransmit IR radiation
- 9. Multiple ChoiceThe finger print region isdifferent for each organic compoundfrom 600 - 1400 cm-1both the above
- 10. Multiple ChoiceThe actual wavelength which is absorbed by any bond can vary.TrueFalse
- 11. Multiple ChoiceStronger bonds absorb IR athigher wave numberslower wave numbersin the finger print region600cm-1
- 12. Multiple ChoiceMass of attached atoms affect the absorbance of the bondTrueFalse
- 13. Multiple ChoiceA molecule has a broadband at 3200cm-1 and sharp band at 1711cm-1. the molecule is most likely anamideesteralkanolcarboxylic acid
- 14. Multiple ChoiceA molecule has a band at 3500cm-1 and sharp band at 1711cm-1. the molecule is most likely anamideesteralkanolcarboxylic acid
- 15. Multiple Choicemolecule than has a broard band at 3400 cm-1 and no sharp peak at around 1680 cm-1amideesteralkanolcarboxylic acid
- Answer choicesTagsAnswer choicesTags