Question

What is the specific rotation if its observed rotation is given as 3x, its length is given as x and density is given as 3/y?

(a) 2y

(b) 3y

(c) y

(d) 4y

The question was posed to me at a job interview.

My question is from Organic Chemistry topic in division Organic Chemistry – Basic Principles and Technique of Chemistry – Class 11

Answer 1

Right option is (c) y

The best I can explain: The specific rotation is given by the expression observed rotation/length X density, here as observed rotation is given as 3x and its length is given as x, while the density is 3/y, the specific rotation equals 3x/x(y/3) = y.