>>214490661
"Like" implies you're looking for a comparison, so you're looking for a noun.
HOW asks for an adjective.
>how are you today?
good
>how is the weather outside?
cold and cloudy
WHAT asks for a noun
>what are you going to wear today?
a suit
>what do you feel when you look at this picture?
anger
Therefore:
>WHAT does ketamine look like?
It looks LIKE sugar.