A transverse section of the trunk of a tree shows concentric rings which are known as growth rings. How aree these rings formed? What is the significance of these rings?

How an annual ring is formed?

What is the moment of inertia of a ring

What is the purpose of ringing experiment?

A brown ring is formed in the ring test for NO_3^- ion. It is due to the formation of

Write the names and symbols of two most reactive metals belongiong to group I of the periodic table. Explain by drawing electronic structure how either one of the two metals reacts with halogen. With which name is the bond formed between these elements known and what is the class of the compuond so formed known? state any four physical properties of such compounds.

Why do annual rings not occur in dicot trees growing on sea shores?