What is the reason for colour change in tomatoes? (green-white-yellow- red)

What is the reason for the amber colour of the urine ?

What is the reason for the red spot on white shirt washing?

What is the reason for the change in colour of copper sulphate when iron nail is kept on it ?

Dheeraj observed that the colour of walls of his house changes gradually into shiny white after white wash. He asked you, why did the colour changed into bright white. Predict the reason.

What is the reason behind blue and yellow coloured flames in combustion process?

what is the ratio of green to yellow sweets?

Red colour of tomato is due to -

Why is the colour of a leaf kept in the dark frequently yellow or pale green ? Which pigment do you think is more stable ?

A light-yellow colour substance (some quantity) on a watch glass light. It changes into gray colour substance. What is the light-yellow colour substance? What is the gray colour substance?Which type of chemical reaction it is? Write the chemical equation for the reaction

When an iron nail is immersed in copper sulphate solution, the colour of solution changes from blue to green colour, The substance formed is the solution is_________