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Is coordinate bond and covalent bond the same. please prove with an example.
Covalent bonds  : Covalent bonds  are formed by mutual sharing of electrons .This type of bond unites two atoms ,both of which are short of electrons .The two atoms contribute one electron each and then share the resulting pairs of electrons .Hydrogen is the simplest compound formed in this way .
Here the two electrons are shared ,and give to each hydrogen atom the configuration of helium .This type of bond is termed covalent bond and is indicated by a line .Covalent bonds are commonly founding organic compounds .

Covalent bonds are volatile ,generally insoluble in water but soluble in organic solvents. They possess low melting and boiling points .Their solutions do not conduct electric current .

Co ordinate bond : Coordinate bond is formed by mutual sharing of electrons but in this case the two electrons  that are shared come  from the same atom .A coordinate bond unites two atoms ,one of which has a spare pair of electrons and the other is a short pair of electrons and the  second atom accepts it .After the formation of the bond ,the lone pair of electrons is held in common .The coordinate bond is represented by an arrow, pointing away from the donor atom .An excellent illustration of the coordinate bond is the reaction between ammonia and boron trifluoride .


Using lines it can be represented as ,


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