Question

Who am I?
a. I am a component of food that makes
paper translucent.
b. Put a drop of me on a cut potato. It turns
dark blue. Who am I?

SCERT Class 7 Telangana, Physical Science Chapter 1 Food Components

Answer 1

a)oil
b)iodine solution

these are the answers

Answer 2

the answer are : 
a. it's oil which make the paper translucent 
b. it's iodine which turn the cut potato dark blue