Answer
365.4k+ views
Hint: Group \[{\rm{V}}\] in the periodic table is known as the nitrogen family and main elements of this group are nitrogen, phosphorus, arsenic, antimony and bismuth. As there are three electrons present in the valence subshell of each element therefore the elements of the nitrogen family form hydrides of types \[A{H_3}\].
Complete answer:
As we know, on moving down the group the atomic size of the elements increases therefore the Vander Waal forces acting between the atoms also increases which leads to increase in the bond strength of molecules. As the bond strength of a molecule increases, the molecule will require more heat to break its bonds. Therefore, the boiling points of hydrides \[{\rm{V}}\] group increases down the group.
The boiling point of ammonia is exceptionally higher than the boiling points of hydrides of arsenic and phosphorus because of hydrogen bonding that exists between the atoms of nitrogen and hydrogen.
Therefore, the correct decreasing order of boiling points of \[{\rm{V}}\] group of hydrides is \[Sb{H_3} > N{H_3} > As{H_3} > P{H_3}\]
So, option (D) is the correct answer.
Note:
Hydrogen bonding: It is a special type of dipole-dipole interactions between the highly electronegative elements (fluorine, oxygen and nitrogen) and the hydrogen atom via covalent bonding. There are two types of hydrogen bonding:
Intermolecular hydrogen bonding- These are the interactions between the atoms of one molecule with the atoms of another molecule. Example: hydrogen fluoride, water, etc.
Intramolecular hydrogen bonding- These are the interactions between two atoms within the same molecule. Example: ethylene glycol.
Complete answer:
As we know, on moving down the group the atomic size of the elements increases therefore the Vander Waal forces acting between the atoms also increases which leads to increase in the bond strength of molecules. As the bond strength of a molecule increases, the molecule will require more heat to break its bonds. Therefore, the boiling points of hydrides \[{\rm{V}}\] group increases down the group.
The boiling point of ammonia is exceptionally higher than the boiling points of hydrides of arsenic and phosphorus because of hydrogen bonding that exists between the atoms of nitrogen and hydrogen.
Therefore, the correct decreasing order of boiling points of \[{\rm{V}}\] group of hydrides is \[Sb{H_3} > N{H_3} > As{H_3} > P{H_3}\]
So, option (D) is the correct answer.
Note:
Hydrogen bonding: It is a special type of dipole-dipole interactions between the highly electronegative elements (fluorine, oxygen and nitrogen) and the hydrogen atom via covalent bonding. There are two types of hydrogen bonding:
Intermolecular hydrogen bonding- These are the interactions between the atoms of one molecule with the atoms of another molecule. Example: hydrogen fluoride, water, etc.
Intramolecular hydrogen bonding- These are the interactions between two atoms within the same molecule. Example: ethylene glycol.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Bimbisara was the founder of dynasty A Nanda B Haryanka class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)