Electron Movement in Organic Reactions — Prelims Questions

Which of the following correctly represents the electron movement in the first step of the reaction between $\text{CH}_3\text{CH}_2\text{Br}$ and $\text{OH}^-$ to form $\text{CH}_3\text{CH}_2\text{OH}$?

Identify the correct electron movement for the formation of a carbocation from $\text{tert}$-butyl bromide in an SN1 reaction.

Which of the following statements about electron movement in resonance structures is FALSE?

In the reaction of an alkene with $\text{HBr}$, the pi bond of the alkene acts as a:

Which of the following represents an incorrect application of curved arrows?

Which of the following species is most likely to act as an electrophile?