# Why is the bottom white in a lucas test?

Consider this positive result from the Lucas test (adding $$\ce{ZnCl2/HCl}$$ to a tertiary alcohol):

My question is quite straightforward but I can't find the answer. What is in the top layer (thin and clear) and what is in the bottom milky layer? Also, what is making it milky?

• Do you know your $3^\circ$-alcohol? How much of it you used for the test? Do you used any organic solvent to dissolve it? Your answers might be within answers to those questions. – Mathew Mahindaratne Nov 1 '19 at 8:02
• The solution might be tertiary alkyl chloride. – Nilay Ghosh Nov 1 '19 at 8:54
• This was not from my experiment - but say 2-methylpropan-2-ol and 3mL? – John Hon Nov 1 '19 at 9:19
• Your picture is from Wikipedia. Hence, I 'm strongly suspect this as a homework question. – Mathew Mahindaratne Nov 1 '19 at 17:55
• Yes it is from wikipedia - why does this mean it's a homework question? I am simply curious what is it that is making it white/cloudy. The picture is for illustration purposes. Even if it WAS a homework question - it still asks for conceptual reasoning which is allowed by the site's policy – John Hon Nov 1 '19 at 23:39