How would you prepare urea from ammonia?

How would you prepare:- Borax from Colemanite

How would you prepare but-2-enal from ethanol?

What happens when boron is strongly heated with concentrated HNO_3 ? What is the role of Boron for the said reaction? How would you prepared borax from Collemainite.

How would you convert

How will you prepare deuteroammonia (ND_(3)) from N_(2) ?

How would you Converst

How would you convert?

How would you convert?

How would you convert?

How would you convert?