An inorganic compound (X) made of two most occurring elements in the earth's crust and used builiding construction when heated in an electric arc furnace with carbon , forms a poisonous gas (Y) which is most stable diatomic molecule. Compound (X) and gas (Y) will be

Step-by-step solution

Students are recommended to see the product given in option and think what is the possibility of starting material according to information provided in the question and chemical properties of starting material. As the most occurring element in the earth crust is silicon as SiO 2 and the chemical reaction of SiO 2 with carbon produces CO which is poisonous gas as shown below SiO 2 + 2 C → Si + 2 CO ↑ Poisonous gas and stable diaotmic molecule