How is charcoal obtained from wood? Why is charcoal Why is charcoal considered a better fuel than wood?
1 Answers
Hydrogen has been used as a rocket fuel. Would you consider it a cleaner fuel than CNG? Why or why not?
Hydrogen can be considered a cleaner fuel because its burning produces water vapour which is non-polluting. However, due to explosive nature of hydrogen, its storage and transportation is difficult
1 Answers 1 views
Give reasons. (a) Water is not used to control fires involving electrical equipment. (b) LPG is a better domestic fuel than wood.
(a) Water is a conductor of electricity, so it can easily conduct electric current and cause danger of electric shocks or short-circuits. Therefore, water cannot be used to control the...
1 Answers 1 views
In an experiment 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 180,000 kJ. Calculate the calorific value of the fuel.
The calorific value of fuel is the amount of heat produced by the complete combustion of 1 kg of fuel. Now, Heat produced by 4.5 kg of fuel = 180000 kJ Therefore,...
1 Answers 1 views
What is biogas? Why is biogas considered an ideal fuel for domestic use?
Biogas is a combustible mixture of methane (about 75%), carbon dioxide, hydrogen and hydrogen sulphide gas. It is obtained by anaerobic decomposition of human and animal excreta and agricultural and...
1 Answers 2 views
Why is biogas a better fuel than animal dung cakes?
Biogas is a better fuel than animal dung cakes because: (i) Burning of animal dung cake causes lot of pollution whereas biogas is a smokeless fuel. (ii) The calorific value of animal...
1 Answers 1 views
Why is charcoal considered a better fuel than wood? What are the disadvantages of converting wood into charcoal?
Charcoal is considered a better fuel than wood because: (i) It has high calorific value. (ii) It does not produce any smoke. Disadvantages: (i) 1 kg of wood on destructive distillation produces only 0.25...
1 Answers 1 views
Though wood is a renewable source of energy, but the use of wood as a fuel is not a wise decision. Explain.
Wood is a renewable source of energy. It is obtained by cutting trees. A new plant sapling usually takes more than 15 years to grow and mature into a tree....
1 Answers 1 views
What is meant by "sustainable management"? Why is reuse considered better than recycling?
A type of management which encourages utilization of resources that meet current basic human needs while preserving the resources for the needs of future generations is called sustainable management. Reuse is...
1 Answers 1 views
Which one of the following has the highest fuel value? (a) Hydrogen (b) Charcoal (c) Natural gas (d) Gasoline
(a) Fuel value can be expressed in terms of calorific value of fuel. The calorific value of a fuel is the amount of heat produced by burning 1 kg of...
1 Answers 1 views
Microbial fuel cells are considered a source of sustainable energy. Why ?
(d) A typical microbial fuel cell consists of anode and cathode compartments separated by a cation (positively charged ion) specific membrane. In the anode compartment, fuel is oxidized by microorganisms,...
1 Answers 1 views