Group 13 Elements

When nitric acid reacts with cane sugar, it forms
oxalic acid.

have hybridisation and no lone pair of electron on central atom but have hybridisation and also contains one lone pair of electron on nitrogen, so is planar.

Each boron atom in diborane is hybridised. In the structure of diborane four H-atoms, two on the left and two on the right, known as terminal hydrogens, are in different environments from the other two hydrogen atoms which are known as bridging atoms. The two boron atoms and the four terminal hydrogen atoms lie in the same plane while the two boron atoms and the two bridging hydrogen atoms, one above and the other below, lie in a plane perpendicular to this plane.

is hydribised and is trigonal planar in shape and hence the bond angle is .