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    Please view the attachment...of diagram of cholesterol

    I. Which of the following groups of atoms lie in a common plane? (enter the letter label(s), unspaced--there may be more than one correct):
    A. 5,6,7,10 B. 1,2,3,4,5,10 C. 7,8,9,10,11 D. 24,25,26,27

    II. What is the hybridization of atom number 27? (enter the letter label from the list):
    A. sp B. sp2 C. sp3 D. dsp3

    III. How many pi-bonds are there in the structure?
    IV. How many methyl (CH3) groups are there in the structure?
    V. How many lone pairs are there in the structure?

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    1)From the given set, atoms in the group A and B lie on the same plane. Normally atoms of the ring lie on the same plane. The atoms in the side chain are not on the same plane. They have different orientations in space.
    2) The atom present at 27 is CH3. We can clearly see that it is in sp3 hybridization. Hence the answer is C.

    3) There is only one pi bond in the molecule (between 5 and 6).

    4) There are five methyl groups in the cholesterol structure.(see fig). They are at 19,18,21,27,26.

    5) All the electrons in the ring are shared. The lone pair of electrons comes from that of oxygen which has two pairs of lone electrons. Hence there are two lone pairs of electrons in the molecule.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 4:50 pm ad1c9bdddf>
    https://brainmass.com/chemistry/biological-and-bioactive-organic-compounds/questions-related-chemistry-cholesterol-10109

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