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Chemistry

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Could someone answer this question so I understand it. Thanks

Alcohols can function as both nucleophiles and as electrophiles in various reaction conditions. Which of the following statements is/are true?

A)When R-O-H is a nucleophile, the O-H bond is broken
B)When R-O-H is an electrophile the R-O bond is broken
C) When R-O-H is an electrophile the OH should be pronated because OH is a poor leaving group.
D)When R-O-H is a nucleophile a base with a pKa > then ROH's can be used to abstract the alcoholic proton.
E) all of the above are true

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