So this may sound strange. But I <3 titrations! Overall, my favourite labs were Org chem labs - because at the end of every lab, we'd get a fine powder (always different substance though, based on whatever we're learning). We'd let them cool for a week or something (?) and come back to the lab afterwards, take our samples to the next room over and do mass spectrometry (I think? I forget what it was called) and had to analyze the results we got from that.
Coincidentally, most of my physics lab partners were foreign students, too. And damn, nice! Was it a MC test, if it took you that short?