GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When is a hydrogen bond formed?
A
when electrons are shared
B
when protons are shared
C
when ions of opposite electrical charges attract each other
D
when a positive hydrogen attracts a negative atom in another molecule
Explanation: 

Detailed explanation-1: -A hydrogen bond is the interaction of a hydrogen atom with an electronegative atom, such as nitrogen, oxygen, or fluorine from another molecule. The hydrogen must form covalent bond with another electronegative atom to create the bond.

Detailed explanation-2: -The hydrogen, which has a partial positive charge tries to find another atom of oxygen or nitrogen with excess electrons to share and is attracted to the partial negative charge. This forms the basis for the hydrogen bond.

Detailed explanation-3: -The positive hydrogen atoms are attracted to negative atoms (nitrogen, hydrogen, or fluorine) in nearby molecules. These bonds are extremely polar because of the high electronegativity difference between the atoms.

Detailed explanation-4: -A hydrogen bond results when this strong partial positive charge attracts a lone pair of electrons on another atom, which becomes the hydrogen bond acceptor. An electronegative atom such as fluorine, oxygen, or nitrogen is a hydrogen bond acceptor, regardless of whether it is bonded to a hydrogen atom or not.

Detailed explanation-5: -Answer. The correct Answer is (b) Hydrogen bond formed between two molecules is called as intermolecular H-bond.

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