11. Which radiation is higher in energy relatively? a) microwave b) visible c) r

Question

11. Which radiation is higher in energy relatively? a) microwave b) visible c) radio-wave d) infrared 12. Spin-Spin splitting is used for finding some information about a. number of hydrogen contributing to that peak in 'H NMR b. number of hydrogen contributing to the neighboring C NMR c. number of hydrogen which has a three-bond distance to that peak in 'H NMR d. number of hydrogen which is closed in the space, not through the bonds in 'H NMR 13. Which of the following fragment peaks would not be present in the mass spectrum of n-hexane? d) 87 c) 57 a) 29 b) 43 14. Predict the molecular formula of the compound represented below based on the MS data given. 16, 15 m/z 17.84 8.10.00 20.0.56 22.0.04 B) C5H24 C C4H602 D) C3H802 E) C5H8O A) C6H12 23. Which of the following compounds will give a molecular ion an odd number? having m/z B. CH,CO,H A) CH, BrCl D. (CH, NCH CEN CH,CH,NH relative to 1H nuclei which are not. 24. 1H nuclei located near electronegative atoms tend to be A) shielded B) deshielded C) resonance D) split E) none of the above

Explanation / Answer

11. Visible is higher energy relatively. As the wavelenth decreases energy increases.

Visible>IR>Microwaves>Radio waves

12. Spin-Spin splitting is used for finding some information about number of hydrogen which is close in the space not through the bonds in H1 NMR.

13. 87 will not be present in mass spectrum of n-hexane.

14. C5H8O is at 84 m/z ratio.

while 86 is given by hexane

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