Question

An inorganic compound (A) made of two most occurring elements into the earth crust, having a polymeric tetrahedral network structure. With carbon, compound (A) produces a poisonous gas (B) which is the most stable diatomic molecule. Compounds (A) and (B) will be :

• A. $Si{O}_2,C{O}_2$
• B. $Si{O}_2,CO$
• C. $SiC,CO$
• D. $Si{O}_2,N_2$

Answer 1

Answer: (B)

$Si{O}_2,CO$

$Si{O}_2+2C\to Si+2CO$
Compound A is silica ($Si{O}_2$) made of $Si$ and $O_2$, two most occuring elements into the earth crust, having a polymeric tetraheadral network structure.
Compound B is $CO$, a poisonous gas which is the most stable diatomic molecule.