Many elements such as alkaline earths, which form refractory oxides re

1.	Many elements such as alkaline earths, which form refractory oxides require somewhat...... temperature for decomposition and for such elements .....is satisfactory.da) higher, air-acetylene mixture (b) medium , air-coal gas inixture(c) more, air-propane mixture (d) Icw, N2O-acetylene mixture
Answer» ONG>ANSWER: (C)... FOLLOW me plz.....

Many elements such as alkaline earths, which form refractory oxides require somewhat...... temperature for decomposition and for such elements .....is satisfactory.da) higher, air-acetylene mixture (b) medium , air-coal gas inixture(c) more, air-propane mixture (d) Icw, N2O-acetylene mixture

Answer» ONG>ANSWER:

(C)...

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