1. A pi to pi* transition is the lowest energy absorbtion.because pi bond energy

Question

1. A pi to pi* transition is the lowest energy absorbtion.because pi bond energy is much lower than sigma bond energy.

2. 2,3 pentadiene is chiral because it is an optically active allene.It is having sigma plane symmetry Ci inversion symmetry.

5.Infra red absorbtion will allow rotational motion in a molecule and it is used to determine the functional group present in the molecule or the number of bonds it have.when IR will pass through the molecule,rotional and vibrational motion will start.

12. It is bicyclo 3 2 1 octane.The IUPAC nomenclature has certain rules for cyclic alkanes.choose the cyclic ring with highest number of C atoms and give number.

Explanation / Answer

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recto- sters: /(50% ;;:) hyd 1) In the UV-visible spectrum of tE)-1,3,5-hexatriene, thd lowest energy pbsorption A) a to transition. B) a to * transition. C) a to-transition. D) a to * transition. E) a to * transition. 2) Which of the following molecules is chiral A) 1,2-pentadi B) 2,3-pentadiene C) 2-methyl-2,3-pentadiene D) 2-chloro-4-methyl-2.3-pentadi E) none of the above molecules is chiral 3) When trans-hex-3-ene is treated with Phco3H) the major organic product is A) a meso epoxide

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