The catenation tendency of C, Si and Ge is in the order Ge < Si < C . The bond energies (in kJ ~mol^ -1 ) of C-C, Si-Si and Ge-Ge bonds are respectively ;

JEE Main 201325 AprilOnline

Exam: JEE Main
Year: 2013
Date: 25 April
Mode: Online
Subject: Chemistry
Chapter: Classification of Elements and Periodicity in Properties

JEE Main 2013 · 25 April · Online · Chemistry · Classification of Elements and Periodicity in Properties

The catenation tendency of C, Si and Ge is in the order Ge < Si < C...

The catenation tendency of

\mathrm{C}, \mathrm{Si}

and

\mathrm{Ge}

is in the order

\mathrm{Ge} < \mathrm{Si} < \mathrm{C}

. The bond energies (in

\mathrm{kJ} \mathrm{~mol}^{-1}

)

of \mathrm{C}-\mathrm{C}, \mathrm{Si}-\mathrm{Si}

and

\mathrm{Ge}-\mathrm{Ge}

bonds are respectively ;

Options

A $348,297,260$
B $297,348,260$
C $348,260,297$
D $260,297,348$

Correct answer

A. $348,297,260$

Step-by-step solution

The linking of identical atoms with each other to form long chains is called catenation. However, this property decreases from carbon to lead. Decrease of this property is associated with

\mathrm{M}-\mathrm{M}

bond energy which decreases from carbon to lead.

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