Forgot Password? OTP has been re-sent. OTP has been sent to your mobile. Finding exercises tough? Install the app to watch our videos and get a crystal clear understanding of concepts Install Now. Ritambhara Nov 6, Difference between luminous and non-luminous flame. Parthasaradhi M Member since Apr 1, Luminous flame Non luminous flame Luminous flame burns yellow in colour Non-luminous flame burns blue in colour Hot and bright Hotter and brighter than luminous flame Limited access to oxygen Unlimited access to oxygen.
Recommend 2 Comment 0. Olivia Member since Apr 1, There are two types of flames:Luminous b Non-luminous The two type of flames can be pictorially depicted as: The differences between luminous and non-luminous flames are: Luminous flame Non-luminous flame This flame when the air pores are fully closed This flame is produced when the air holes are not fully closed It is large and wavy This is small and steady It can produce soot It does not produce soot It burns quitely It burns with a roaring sound.
Recommend 0 Comment 0. Satyanarayana Prasad. Ans: Substances which vaporize during burning gives flame. The substance which does not vaporize during burning does not produce flame. Flame is of two types. Luminous flame 2. Luminous flame: A luminous flame is a bright yellow flame which gives of light. Non-luminous flame: A non-luminous flame does glow as bright as luminous flame. It undergoes complete oxidation, so it gets much hot high temperature than luminous flame.
Jyoti nigam. A blue colored flame which produces very little light is called nonlunminous flame. In other words when a fuel undergoes complete combustion it is non luminous flame.
When the air hole of the Bunsen burner is closed, very little air enters the barrel of the burner, thus the gas only mixes with surrounding air at the point of combustion at the top of the burner. In this case, the flame will be yellow, large, unsteady, bright and sooty due to incomplete combustion.
Luminous flames are not used in experiments not best for laboratory operations because it is wavy and sooty in nature. Examples of luminous flames include burning wood, candles, Olympic cauldron etc. A non-luminous flame is the type of flame produced by the Bunsen burner when the air-hole is closed. The flame is generally blue in color, small, steady and cannot be seen from far. It usually burns with a roaring sound.
When the air-hole of the Bunsen burner is fully opened, sufficient air enters the Bunsen burner barrel and mixes well with the coal gas, hence, the burning of the gas is much quicker and complete.
The flame is smaller and hotter. Due to the absence of white-hot carbon, no light appears. Due to unlimited supply of air, there is usually complete combustion of carbon and thus non-luminous flames are hotter and do not produce soot. For this reason, they are most preferably used in experiments laboratory operations.
Examples of non-luminous flames include flames of a Bunsen burner when the air-hole is closed, acetylene torches etc. Uses of flames. In this regard, non-luminous flames are most preferably used in experiments laboratory operations. Viva Differences. Comments are closed. Flames do not burn more efficiently.
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