JEE Main 2019 — Chemistry solution

JEE Main2019Chemistry

The correct order of catenation is :

A
C > Si > Ge $\approx$ Sn
B
C > Sn > Si $\approx$ Ge
C
Si > Sn > C > Ge
D
Ge > Sn > Si > C

Solution

The order of catenation property amongst 14th group elements is based on bond enthalpy values of identical atoms of the same element. The decreasing order of bond enthalpy values is

Bond enthalpy $C k J / M o l 348 - C > S i 297 - S i > G e 260 - G e \approx S n l K / m o l 240 - S n$

$∴$ Decreasing order of catenation is

$C > S i > G e \approx S n$

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