NTA Abhyas NEET2020Chemistryp Block Elements (Group 13 & 14)Practice
The reason for the distinct difference in the properties of C O 2 and S i O 2 is
Options
- ACarbon is more electronegative than O and in case of S i O 2 oxygen is more electronegative than silicon
- BCarbon has small size and forms a π bond with good overlap whereas silicon has larger size hence has a poor π
- CFirst ionization potential of carbon is higher than that of silicon
- DCarbon has only 'p' orbitals and lacks 'd' orbitals whereas silicon has 'd' oribtals
Correct answer
B. Carbon has small size and forms a π bond with good overlap whereas silicon has larger size hence has a poor π
Step-by-step solution
C O 2 is a linear discrete gaseous molecule while S i O 2 is a three dimensional network solid as in C O 2 π bond do not polymerised due to strong overlapping while in S i O 2 π bond polymerised due to poor overlapping.