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JIPMER 2015
Exam
JIPMER
Year
2015
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JIPMER 2015 · Chemistry · General Principles and Processes of Isolation of Metals

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

The catenation tendency of C,Si\mathrm{C}, \mathrm{Si} and Ge is in the order Ge<Si<C\mathrm{Ge} \lt \mathrm{Si} \lt \mathrm{C}. The bond energies (in kJmol−1\mathrm{kJ} \mathrm{mol}^{-1} )ofC−C,Si−Siof \mathrm{C}-\mathrm{C}, \mathrm{Si}-\mathrm{Si} and Ge−Ge\mathrm{Ge}-\mathrm{Ge} bonds, respectively are

Options

  1. A348,167,180348,167,180
  2. B348,180,167348,180,167
  3. C167,180,348167,180,348
  4. D180,167,348180,167,348

Correct answer

B. 348,180,167348,180,167

Step-by-step solution

Catenation tendency decreases with the decrease in M−MM-M bond energy. Thus, bond energies of C−C,Si−Si\mathrm{C}-\mathrm{C}, \mathrm{Si}-\mathrm{Si} and Ge - Ge must be 348, 180 and 167 kJ mol−1167 \mathrm{~kJ} \mathrm{~mol}^{-1} respectively.
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