Duduli

Answer:- Electrostatic force of attraction between hydrogen atom of one molecule and a highly electronegative element (such as F, O & N) present within the same molecule or another molecule of the same or different compounds is known as hydrogen bonding.In water their exist hydrogen bonds.

Answer:- The force of attraction between the molecules of different substances are called adhesive force. e.g writing on blackboard by chalk is possible due to adhesive force between molecules of chalk and blackboard.

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Answer:- The molecule in which the central atom belongs from 3rd to 6th period element and their is atleast one lonepair of electron on cental atom then that molecule is called Dragoes molecule.  e.g AsF3, Here As(Arsenic) belongs to 4th period element and their is also a lone pair of electron on arsenic atom.so it is a Dragoes molecule.

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Answer:- A chemical equation which includes the heat changes taking place during a chemical reaction is called the Thermochemical equations.