How does Huxley create a dramatic sense of contrast in the first eleven chapters of Brave New World?
You might want to think about analysing Chapter Seven in depth, which is when Lenina and Bernard visit the publo in the reservation, and both are exposed to "real" life as opposed to the perfect life that they have been living in the city. It is highly amusing that Lenina finds fault with everything that they see. She doesn't like their guide, who smells in her opinion, and she is shocked to see an old man whose face has so many wrinkles it is described as being like "a mask of obsidian." We see the contrast between "civilisation" and the savagery of the reservations built up. Note how Bernard describes the old man's age and why old people from their home do not look like this man:
That's because we don't allow them to be like that. We preserve them from diseases. We keep their internal secretions artificially balanced at a youthful equilibrium. We don't permit their magnesium-calcium ration to fall below what it was at thirty. We give them transfusions of young blood. We keep their metabolism permanently stimulated. So, of course, they don't look like that.
Lenina is left to "face the horrors" of this pueblo without soma, as she is shocked again and again by normal scenes of life as it is for us. The contrast thus helps to underline how society has changed so radically and how advanced it has become.