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प्रश्न
Fill in the blank
Coal, petroleum, and natural gas are _________fuels.
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उत्तर
Coal, petroleum, and natural gas are fossil fuels.
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संबंधित प्रश्न
Define ignition temperature of a fuel.
Coal is said to be formed from the wood of trees. Why then is coal considered to be a non-renewable source of energy whereas wood is a renewable source of energy?
Calorific value and ignition temperature of fuel X are 75 kJ/g and 20°C respectively. These values for fuel Y are 50 kj/g and 75°C respectively. On burning, the fuel Y produces only CO2while fuel X produces CO2 and CO. Which of the two is a better fuel? Give two reasons to support your answer.
Name any four fractions obtained from petroleum which are used as fuels.
Why is the leakage of LPG detected easily although it is odourless? State the steps to be taken in case its leakage is detected in the kitchen.
Describe how fossil fuels were formed.
The natural gas consists mainly of:
(a) methane
(b) ethane
(c) propane
(d) butane
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.
Name the element X.
Name the constituents of biogas.
Write any two advantages of using biogas.
Name five renewable and three non-renewable sources of energy.
Answer the following question.
Write the name of the main constituent of Biogas. Also, state its percentage.
Fill in the blank
__________ are examples of renewable energy resources.
State whether the following is True or False.
China, the USA, and Spain are major producers of wind energy.
Describe the four major types of coal.
Can you tell?
What is ‘green energy’?
Explain why is it no wise to regard wood as a renewable sources of energy.
Acid rain happens because ______.
The underlined word in the following sentence have been jumbled up. Write them in their correct form.
Nutsgilh is an example of inexhaustible natural resources.
Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources.
| air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen |
