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Heat is the same as a flame
A luminous flame is blue in colour
A flame is the visible glowing part of a fire
Non luminous flame does not produce soot
We commonly use the Bunsen burner as a source of heat in the laboratory
The most common source of heat used in laboratories is the........................
kerosene stove
spirit lamp
Bunsen burner
A Bunsen burner produces the hottest flame when..........
the air holes are fully opened
the air holes are closed
the air holes are half -open
A non luminous flame is ............in colour
yellow
purple
blue
Which is the hottest part of a non-luminous flame?
the outer zone
the tip of the middle zone
the tip of the inner zone
A non-luminous flame has.....................
four zone
two zone
three zone
