Question

Define 'Racemization'.

Answer 1

When equal amounts of $d-$ isomer and $l-$ isomer are mixed one gets a '' racemic mixture" and this process is called racemisation.
For example, when equal amounts of $d-$ tartaric acid and $l-$ tartaric acid are mixed, we get racemic tartaric acid which is opticalled inactive mixture. Optical inactivity is due to external compensation. They can be separates into two optically active form.