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प्रश्न
Fill in the blank
_______is the coal with the highest percentage of coal.
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उत्तर
Anthracite is coal with the highest percentage of coal.
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संबंधित प्रश्न
Name two energy sources that you would consider to be renewable. Give reasons for your choices.
"The ignition temperature of a fuel is 80°C". What does this mean?
Which gaseous fuel is being used increasingly in transport vehicles like cars and buses these days?
State one important use of CNG these days.
Explain how, sun is considered to be the ultimate source of fossil fuels
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.
Name another element which is usually found in combination with X in fossil fuels.
Suggest a safe and efficient method for the disposal of biowastes and sewage materials. How is this method advantageous to us?
Name the major component of biogas.
Which produced of the nuclear fission of uranium-235 is utilised to cause further fission of its nuclei?
Which of the two is more energy efficient: filament type electric bulb or CFL? Why?
Why is the use of wood as a fuel not advisable although wood is a renewable source of energy?
State whether the following is True or False.
The Sardar Sarovar Dam is built on the river Narmada.
Why is charcoal considered better fuel than wood?
Which part of the solar cooker is responsible for greenhouse effect?
Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?
Which of the following is a pair of exhaustible natural resources?
Coal is one of the ______ used to cook food.
Write True/False against the following statement.
Oxygen in air is an exhaustible natural resource.
Match the items given in Column I with the items of Column II.
| Column I | Column II |
| (a) Used for road surfacing | (i) Black gold |
| (b) Natural gas | (ii) Vaseline and candles |
| (c) Petroleum | (iii) Bitumen |
| (d) Paraffin wax | (iv) CNG |
