Hydrogen bonds take place between the molecules of H2O.
• Hydrogen bonding takes place only in the molecules where the hydrogen is covalently bonded to nitrogen, oxygen, or fluorine.
• The electronegativity of these three elements is so much that they withdraw most of the electron density in the covalent bond with hydrogen, leaving the atom of hydrogen extremely electron-deficient.
• In the molecule of water, the nucleus of oxygen with +8 charges attracts electrons better than the nucleus of hydrogen with its +1 charge.
• The hydrogen atoms apart from being covalently bonded with the atoms of oxygen are also attracted towards the oxygen atoms nearby. This attraction is the basis of the hydrogen bonds.
Thus, option B, H2O is correct.
To know more about:
Hydrogen bonds can be found between molecules of H2O (water). This is due to the fact that water has a highly electronegative oxygen atom and hydrogen atoms capable of forming a dipole interaction, thereby constituting a hydrogen bond.
Hydrogen bonds can be found between molecules of substance B: H2O, also known as water. Hydrogen bonding occurs when a highly electronegative atom such as Oxygen (O), Nitrogen (N), or Fluorine (F) is involved and there is a hydrogen atom attached to these. In the case of water, there are two hydrogen atoms bonded to a single oxygen atom, which is highly electronegative. These specific features allow for the formation of a relatively strong dipole interaction, called a hydrogen bond, between separate water molecules.
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Answer:
0
Explanation:
The number of unpaired electrons in is 0
Answer:
4 unpaired electrons
Explanation:
becausd it have 4 unpaired electros it is paramagnetic
Can someone explain this one?
pharynx
stomach
Pharynx is cone-shaped passageway leading from the oral and nasal cavities in the head to the esophagus and larynx. The pharynx chamber serves both respiratory and digestive functions
After the food has been chewed and lubricated, it is pushed by the tongue into the Pharynx
Answer : The correct option is, (3)
Explanation :
Isomers : It is defined as the molecule that has the same chemical formula but it has the different structures.
Same chemical formula means that the same number of elements are present in both the compounds.
In option 1,2 and 4, both chemical formula and the structure are different. So, the option 1 compounds are not the isomers of each other.
In option 3, the chemical formula is same but the structure are different. So, the option 3 compounds are the isomers of each other.
Hence, the correct option is, (3)