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CBSE - VIII - Science - Combustion and Flame
Mention some effects of global warming.
Asked by Topperlearning User
21st July 2016,
7:31 AM
CBSE - VIII - Science - Combustion and Flame
Name the poisonous gas released from the incomplete combustion of fuels.
Asked by Topperlearning User
21st July 2016,
7:30 AM
CBSE - VIII - Science - Combustion and Flame
What causes global warming?
Asked by Topperlearning User
21st July 2016,
7:30 AM
CBSE - VIII - Science - Combustion and Flame
Write a short note on acid rain.
Asked by Topperlearning User
21st July 2016,
7:29 AM
CBSE - VIII - Science - Combustion and Flame
(a) What happens when coal is burnt in an insufficient supply of air in a room with closed doors and windows? (b) The use of petrol and diesel as fuels in automobiles is being replaced by CNG. Why?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
(i) How can burning of fuel cause acid rain? (ii) How can burning of petrol and diesel be responsible for reducing the visibility of air?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
(i) For centuries wood was used as domestic and industrial fuel. But now it has been replaced by other fuels. Why? (ii) What is responsible for destroying the beauty of the Taj?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
(i) Write two harmful effects of acid rain. (ii) Which industry is the main source of gaseous pollutants like sulphur dioxide and nitrogen dioxide?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
(i) Name the suffocating gas produced by burning of diesel.(ii) Name the fuel which is used in automobiles in place of diesel and petrol.(iii) Name two chemicals responsible for acid rain.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
Why is the use of petrol and diesel as fuels in automobiles replaced by CNG?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
How can increase in temperature caused due to burning of fuels be harmful to earth?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
Why is it advised not to sleep in a closed room with a burning coal fire in it?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
How can burning of fuels lead to air pollution?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
How can burning carbon fuels cause respiratory diseases such as asthma?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - VIII - Science - Combustion and Flame
How can burning of fuels cause an increase in the temperature of earth leading to global warming?
Asked by Topperlearning User
26th November 2013,
9:35 AM
