What is allotropy ? Give the allotropes of oxygen. 

What is allotropy ? Give the crystalline allotropes of cabon.

What is allotropy? Name the crystalline allotropes of Carbon. What are their uses?

What is allotropy ? Explain the different allotropic forms of phosphours.

What are the uses of oxygen?

The hardest allotrope of carbon:

Write any two compounds, in which oxygen shows an oxidation state different from -2. Give the oxidation states of oxygen in them.

Write any two compounds, in which oxygen shows an oxidation state different from -2. Give the oxidation states of oxygen in them.

What is the fate of pyruvate in the absence of oxygen in plants ?