He frequency of the stretching vibration of a bond in IR spectroscopy depends on A) the strengthof the bond and the electronegativity of the atomsB) the electronegativity of the atoms and the nuclear charges of the atomsC) the electronegativity of the atoms and the masses of the atomsD)the masses of the atoms and the strengthof the bond

D) the masses of the atoms and the strength of the bond.

Explanation:

Mostly in diatomic and triatomic molecules, bonds of the molecules experience vibrations and rotations. When there is a continuous change in the bond distance of the two atoms then these vibrations are termed as stretching vibrations.

As these vibrations exist in the bonds between the atoms. So they depend upon the masses of the atoms and strength of the bonds. Greater masses of the atoms and strong bond strength will result in reduction of vibration. Thats why we don't observe such stretching vibrations in larger, massive molecules. They mostly exists in the diatomic and triatomic molecules where the bond strength is not that much stronger and the masses of the atoms are small.

a and c

c is 100% but i am confused in a