How can one understand the completion of the burning of lime?

How can one understand the completion of the burning of lime? Correct Answer Blue flame at the top disappears

A blue flame indicates complete combustion, implying no wastage of resources. Hence, we can ensure the proper burning of lime.
Bissoy MCQ

Related Questions

Assertion A : Lime based mortars give higher ratio of brickwork strength to mortar strength as compared to non-lime mortar.
Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars.
Select your answer according to the codes given below:
Which lime is referred to as burned lime or quick lime