Question

An element of group 14 forms two oxides one of which is highlty poisionous and neutral. Other oxide can be easily liquefied and compressed to give a solid which is used as a refrigerant under the name of drikold. The element and the oxides are
A. `Si,SiO,SiO_(2)`
B. `Pb,PbP,PbO_(2)`
C. `C,CO,CO_(2)`
D. `Sn,SnO,SnO_(2)`

Answer 1

Correct Answer - C
C forms two oxides CO and `CO_(2)`. CO is neutral and poisnonous `CO_(2)` can be compressed to a refrigerant dry is ice or solid `CO_(2)`. SiO is unstable. SnO and PbO are amphoteric in nature.