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CBSE - VIII - Science - Combustion and Flame

  Why a piece of wood does not catch fire when a lighted mathstick is brought near it

Asked by goel_kavya 18th February 2019, 10:41 AM
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CBSE - VIII - Science - Combustion and Flame

Some materials burn with a flame, whereas others burn without a flame. Why?  

Asked by polygonpatna 18th February 2018, 7:38 PM
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CBSE - VIII - Science - Combustion and Flame

table 6.4 activity answers  

Asked by salimkumarev 11th January 2018, 8:15 PM
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CBSE - VIII - Science - Combustion and Flame

Some materials burn with a flame whereas, others burn without a flame.

Asked by polygonpatna 6th October 2017, 8:52 PM
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CBSE - VIII - Science - Combustion and Flame

Why LPG burns with a blue flame?

Asked by Topperlearning User 21st July 2016, 7:21 AM
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CBSE - VIII - Science - Combustion and Flame

Draw a labeled diagram of a candle flame.

Asked by Topperlearning User 21st July 2016, 7:20 AM
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CBSE - VIII - Science - Combustion and Flame

Label different zones of a candle flame?

Asked by Topperlearning User 2nd April 2015, 8:43 AM
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CBSE - VIII - Science - Combustion and Flame

Explain the three zones of a flame by taking the example of candle flame.

Asked by Topperlearning User 2nd April 2015, 7:49 AM
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CBSE - VIII - Science - Combustion and Flame

How does the temperature of the candle vary in different zones in the following diagram?

Asked by Topperlearning User 2nd April 2015, 7:34 AM
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CBSE - VIII - Science - Combustion and Flame

(a) When fuels burn, the type of flame produced depends on the proportion of oxygen which is available for burning of fuel. What are these different types of flame? Give examples. (b) Describe an activity to show that the middle zone of candle flame consists of unburnt carbon particles.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - VIII - Science - Combustion and Flame

Which type of substances give flames during burning? Give any two examples of such substance.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - VIII - Science - Combustion and Flame

Which flame zone would produce the following effect?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - VIII - Science - Combustion and Flame

What determines the flame colour?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - VIII - Science - Combustion and Flame

Which flame zone is used by goldsmith to make gold jewellery and why?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - VIII - Science - Combustion and Flame

Why do we not get a flame when charcoal is burnt?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - VIII - Science - Combustion and Flame

Why is it dangerous to burn coal in closed room?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - VIII - Science - Combustion and Flame

Which zone of candle flame is dark and why?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - VIII - Science - Combustion and Flame

Where should we place a toothpick in a candle flame to burn it the fastest?

Asked by Topperlearning User 26th November 2013, 10:54 AM
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