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CBSE - VIII - Science - Combustion and Flame
What is coal
Asked by sharmalokesh771982
12th June 2021,
8:00 PM
CBSE - VIII - Science - Combustion and Flame
CAN I KNOW THE DEFINATION OF COMBUSTION
Asked by www.suvra
7th May 2020,
10:47 AM
CBSE - VIII - Science - Combustion and Flame
How to test hydrogen gas?
Asked by ankukumar9852
7th July 2019,
7:20 PM
CBSE - VIII - Science - Combustion and Flame
Cooking is a chemical reaction. Cooking can be done using cow-dung cakes or wood or LPG cylinder or solar cooker or microwave oven. Which one do you think is the best and why?
Asked by adalroshan2464
12th May 2019,
3:29 PM
CBSE - VIII - Science - Combustion and Flame
what is inflammable substance
Asked by munnat255
1st September 2018,
10:01 AM
CBSE - VIII - Science - Combustion and Flame
How is efficiency of fuel expressed?
Asked by Topperlearning User
21st July 2016,
7:25 AM
CBSE - VIII - Science - Combustion and Flame
Which zone of the flame has a high temperature?
Asked by Topperlearning User
21st July 2016,
7:20 AM
CBSE - VIII - Science - Combustion and Flame
Is burning of magnesium ribbon a combustion reaction?
Asked by Topperlearning User
21st July 2016,
7:17 AM
CBSE - VIII - Science - Combustion and Flame
How is biogas formed?
Asked by Topperlearning User
20th July 2016,
11:08 AM
CBSE - VIII - Science - Combustion and Flame
Substances which give heat and light energy are called feuls, then is magnesium ribbon also a fuel? Because when it burns, it gives out brilliant white light and heat.
Asked by dharm desai
20th August 2014,
6:38 PM
CBSE - VIII - Science - Combustion and Flame
(a) For boiling some water, which one will be preferred - LPG or coal or cow-dung cakes? Give reasons. (b) What are the characteristics of an ideal fuel?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
(a) What are the different types of fuels? Give two examples for each. (b) How is the efficiency of a fuel expressed?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
Why carbon fuels like wood, coal, petroleum etc are not considered to be a clean fuel?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
Arrange the following in increasing order of calorific value: coal, petrol, LPG, CNG, Hydrogen gas
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
Out of cow dung, coal and LPG as fuel. Which fuel would you prefer to boil a given quantity of water? Give reason for your answer.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
Which fuel has highest calorific value?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
What is the unit of calorific value of a fuel?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
What is meant by calorific value?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
Why is hydrogen not used as a fuel extensively?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
Why is CNG said to be a clean fuel?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
You are asked to choose a good fuel. Write four characteristics you will keep in view?
Asked by Topperlearning User
4th June 2014,
1:23 PM
