Is H2Co a Tetrahedral

The central atom of H2CO, has three regions of electron density around it. The regions of electrons making a trigonal planar shape, giving a bond angle of 120°. All three of these regions of electrons are bonding so the arrangement of the bonds/molecular shape is trigonal planar.

Is the molecule H2CO polar or nonpolar?

H2 CO is polar because the shared electrons between the carbon atom and the oxygen atom are not shared equally between the two.

What type of bond is CH2O?

CH2O is the molecular formula of Formaldehyde (HCHO), where the central atom Carbon (C) is having valency 4 and bonded with 2 Hydrogen atoms and 1 Oxygen atom. In this process C is sp2 hybridized and form 3 sigma bonds along with 1 pi bond. All the bonds are covalent in nature.