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प्रश्न
Choose the correct answer.
The coal that has the highest percentage of carbon is
पर्याय
anthracite
bituminous
lignite
peat
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उत्तर
The coal that has the highest percentage of carbon is anthracite
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संबंधित प्रश्न
Name any one hydrocarbon fraction obtained during the fractional distillation of petroleum which is used as a domestic fuel.
What is the composition of liquefied petroleum gas (LPG)?
What is the main constituent of:
(1) petroleum gas?
(2) natural gas?
State one important use of CNG these days.
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.
Which fossil fuels were formed by the buried remains of small plants and animals?
Which fossil fuel formed by the buried remains of large land plants?
The main constituent of petroleum gas is:
(a) methane
(b) ethane
(c) butane
(d) propane
The natural gas consists mainly of:
(a) methane
(b) ethane
(c) propane
(d) butane
The pollution of air caused by burning petroleum fuels (like petrol and diesel) in vehicles can be controlled by fitting a device X in the exhaust system of vehicles.
How does this device help in controlling air pollution?
Compare the sun and the fossil fuels as the sources of energy.
Name the major component of biogas.
Write any two advantages of using biogas.
Which of the following is ultimately not derived from the sun's energy (or solar energy)?
(a) wind energy
(b) nuclear energy
(c) biomass energy
(d) ocean thermal energy
The source of energy of the sun is:
(a) conversion of hydrogen gas into helium
(b) conversion of carbon fuel into carbon dioxide
(c) burning of hydrogen gas present in the sun
(d) disintegration of uranium into barium and krypton
State whether the following is True or False.
The Sardar Sarovar Dam is built on the river Narmada.
Write a short note on nuclear power.
Exhaustible natural resources are
Write True/False against the following statement.
Oxygen in air is an exhaustible natural resource.
Fill in the blanks and complete the story.
About 300 million years ago, the earth had dense ______ in low lying wetland areas. Due to natural processes like ______, these forests got buried under the ______. As more ______ deposited over them, they were compressed. The ______ also rose as they sank deeper and deeper. Under high ______ and high ______, dead plants got slowly converted into coal.
