If wind blows against a mountain from the south side then on which slope would you expect to find the precipitation?

You would expect to find the precipitation on the windward slope, which in this case would be the south side of the mountain. As the air rises and cools when it hits the mountain, it reaches its dew point and condenses into precipitation. This leaves the leeward side, or the north side in this scenario, in a rain shadow with less precipitation.