1. What two reasons does Iago give for his hatred of Othello?
He gave the lieutenant's job's to Cassio. He suspects that Othello has slept with his wife Emilia
2. What information do Roderigo and Iago give to Brabantio regarding Desdemona's situation?
They say that she has eloped with the Moor and is currently "making the beast with two backs" with him. They tell him that Brabantio will have crude animal grandchildren.
3. How does Iago make himself look favorable in Othello's eyes?
He pretends to be so angry with Roderigo that he would stab him. He warns Othello that Brabantio is coming to break up his marriage.
4. What news does Michael Cassio bring when he enters?
The Duke wants to see Othello, as there is some trouble with the Cyprus colony.
5. How does Brabantio explain Desdemona's affections for Othello?
His white daughter would never love him naturally, so he must have used black magic/witchcraft on her.
6. What is the military issue that the Duke of Venice and his senators discuss?
The Turkish fleet sailing for Rhodes is actually a decoy for the real attack on Cyprus
7. What accusation does Brabantio make against Othello to the Duke?
That Othello stole his daughter through magic/trickery and their marriage cannot be allowed
8. What explanation does Othello give as cause for Desdemona's affection for him?
That he told her many stories of his hard but exciting life and that she did pity him for his adventures.
9. To whom does Desdemona pledge herself?
To her husband Othello, as her mother did for Brabantio over her own father.
In the final speech of Act I, what does Iago plan to do to further his plot against Othello?
He plans to make Othello jealous of Cassio to ruin his marriage.