A hydrogen bond is: a. a strong attraction between hydrogen and another atom. b. a bond between a hydrogen atom already covalently bound to one atom and made partially negative by unequal electron sharing with another atom. c. a bond between a hydrogen atom already covalently bound to one atom and made partially positive by unequal electron sharing with another atom. d. weaker than van der Waals forces. e. exemplified by the two hydrogens covalently bound to oxygen in the water molecule.

Option (A) is Right Answer

Explanation:

     (A) A strong attraction between hydrogen and another atom

A hydrogen bond is a strong attracted between the hydrogen and another atomA hydrogen bond  is an incomplete partial inter molecular bonding  between a solitary pair on an electron-rich donor  molecule, especially the second-row elements nitrogen (N), oxygen (O), or fluorine (F), and the anti bonding orbital of a bond between hydrogen (H) and a progressively electronegative  Hydrogen holding is caused by the tendency of certain items in particles to pull in electrons more than their going with moleculeIt  gives the atom a changeless dipole moment

A) the enthralling of formation for pure element in its standard state is always positivehope this : )