Question

Choose the correct word from the bracket and fill in the blanks.

A flame which produces a temperature of about ${3500}^{\circ }\mathrm{C}$ is _________(oxyacetylene flame/ hydrazine flame)

Answer 1

1. A flame which produces a temperature of about ${3500}^{\circ }\mathrm{C}$ is __oxyacetylene flame__.
2. Oxyacetylene is formed by the combustion of oxygen and acetylene.
3. The chemical reaction followed in such combustion is:
   $\underset{\left(\mathrm{Acetylene}\right)}{2{\mathrm{C}}_2{\mathrm{H}}_2\left(\mathrm{g}\right)}+5{\mathrm{O}}_2\left(\mathrm{g}\right)\to 4{\mathrm{CO}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$
4. When they are mixed in accurate proportion then they produce a hot flame of temperature about ${3200}^{\circ }\mathrm{C}-{3500}^{\circ }\mathrm{C}$.
5. Hence, oxyacetylene flame is produce at temperature of about ${3500}^{\circ }\mathrm{C}$.