z.what is the structure of the compound thet gives the fotlewing Maas Mol. Wt is

Question

z.what is the structure of the compound thet gives the fotlewing Maas Mol. Wt is 1147 o000 spectrum and ie's a- Decane b- octane c Butane d-Benzene at a secondary alcohol has been completely oxidised to a ketone you can.. a-check that the IR spectrum has absorptions at 3500cm and 1650em absorptions b-check that the IR spectrum has no absorption c-check that the IR spectrum has no absorption aroun d-check that the IR spectrum no absorptions at 3500cm1 and 1650cm 9. The region of an infra-red spectrum where many absorptions take place is known as the... a-thumbprint region b-handprint region -footprint region d-fingerprint region 10.Which compound has a molecular ion at m/z-58, an infra red absorption at 1650cm2 a-butane b-CH,COCH c-CH,CH CH3 d-2-methylpropane 11.To work out the molecular mass of an organic molecule you would look at its... a-infra red spectrum b-mass spectrum c-proton nmr spectrum d-boiling point. 12.Which of the following compounds will give a molecular ion having m/z an odd number? a-CH,CHOH b-CH BrCI c-CH,CO,H d-CH,CH2NH2 e-(CH)NCH,C 13. What class of compounds is most likely to give a fragment ion at m/z= M-18? a-alkene b-cycloalkane c-alcohol d- alkyl iodides e-benzene derivatives

Explanation / Answer

7. Answer is option b. Octane

Reason : molecular ion peak at 114 m/z

Molecular weight of octane is 114.

8. Answer is option b.

Reason : seconary alcohol has absorption at 3500 cm -1 which will disappear when completely converted into ketone.

9. Answer is option d. Finger print region

10. Answer is option B. CH3COCH3

Reason :

Which has molecular ion peak at 58 m/z and carbonyl absortion at 1650 cm -1

11. Answer is option B. Mass spectrum

12. Answer is option d. CH3CH2NH2 = 45 m/z

13. Answer is option C. Alcohol.

Reason : due to water fragment which has m/z of 18.

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