Edexcel Chemistry A2 Unit 5 ~ Wednesday 19th June 2013 (Now Closed) Watch
In other words, we're able to distil a product at a lower temperature than it's boiling point. Extremely useful if we want to maximise the product yield.
Edit; yes that is actually, but it's not a test for it
since they're in equal amounts there will be no optical activity of the mixture as a whole
No, it might have a chiral carbon but it might be a racemic mixture, in that case it's not optically active. All optically active substances have chiral carbon atoms, but not all molecules with chiral carbon atoms are optically active. If that makes any sense