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RRB Group-D Model Paper 12 with answers for online practice
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© examsnet.com
Question : 54
Total: 100
The bond energy for catenation next to carbon is
S
Si
P
N
Validate
Solution:
Catenation is the binding of an element to itself through covalent bonds to form chain or ring molecules.
Carbon is the most common element that exhibits catenation.
It can form long hydrocarbon chains and rings like benzene.
Please note that the smaller the atom, the stronger is the tendency of catenation.
All the elements of the carbon family or group 4 family exhibit catenation property.
The carbon family includes carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl).
The ability of an element to catenate is primarily based on the bond energy of the element to itself, which decreases with more diffuse orbitals.
The bond length decreases across a row in the periodic table and increases down a group.
The bond energy of S-S is 266 Kj/mol.
The bond energy of Si-Si is 340 Kj/mol.
The bond energy of P-P is 54 Kj/mol.
The bond energy of N-N is 160 Kj/mol.
© examsnet.com
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