NTA Abhyas NEET2020Chemistryp Block Elements (Group 13 & 14)Practice
Which among the following is a false statement?
Options
- AS i O 2 has a structure similar to that of C O 2
- BNatural Si exists only in the combined state
- CSi can be prepared by reducing S i O 2 with Mg
- DSi does not exist in graphite-like structure, but exists only in diamond like structure
Correct answer
A. S i O 2 has a structure similar to that of C O 2
Step-by-step solution
S i O 2 has three-dimensional network of S i - O bonds; whilst carbon dioxide consists of discrete C O 2 molecules . S i O 2 is solid, whereas C O 2 is a gas. B. Because of its great affinity for oxygen, Si always occurs as the oxide, silica ( S i O 2 ) or in the form of silicates, which are the compounds of S i O 2 with other metal oxides. C. S i O 2 + 2 M g → S i + 2 M g O D. the reluctance of silicon to form p π - p π bonds to itself is clearly shown by the fact that silicon does not exists in graphite-like stru