How do you get secondary colours by colour addition?

The primary colours are

Complementary colours are

When a metal of group 1 was dissolved in liquid ammonia, the following observations were obtained (a) Blue solution was obtained initially. On concentrating the solution, blue colour changed to bronze colour.How do you account for the blue colour of the solution? Given the name of the product formed on keeping the solution for some time.

Assertion: The greater part of secondary xylem is lighter in colour and consists of dead elements with highly lignified walls and is called heartwood. Reason The peripheral region of the secondary xylem is dark brown in colour and is called sapwood.

Which of the following metal(s) do (es) not give characteristic flame colouration?

How do plants get nitrogen?

Name secondary colours of light? How are they formed?

Name the following Secondary colours formed by mixing of lights of different colours

What are primary and secondary colours of light? Why are they called so? Explain with examples.

(a) How do primary, secondary and tertiary alcohols differ in their behaviour towards oxidising agents. (b) How will you distinguish between primary, secondary and tertiary alcohols by Victor Meyer's method ?