Why is charcoal considered a better fuel than wood? What are the disadvantages of converting wood into charcoal?

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

(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...

Burning of wood is a chemical change because wood on burning converted to new substances like ash (carbon), carbon dioxide gas, water vapour, heat and light. The change is irreversible....

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...

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...

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....

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...

Charcoal is obtained from wood by destructive distillation of wood. Charcoal is considered a better fuel than wood because  (i) it has higher calorific value than wood.  (ii) it does not produce...

(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...

(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,...