What type of intermolecular force is responsible for the unusual boiling point of h2o at standard pressure

Hydrogen bonding  

Step-by-step explanation:

The O-H bonds in water are highly polar.

There is an especially strong type of dipole-dipole attraction between the partially positive H atom in one molecule and the partially negative O atom on a nearby molecule.

We call this type of intermolecular force hydrogen bonding.

The strong attractive forces mean that we must supply extra energy to separate the molecules from each other.

Water therefore has an unusually high boiling point .

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-