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प्रश्न
Petroleum, ______ and ______ are fossil fuels.
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उत्तर
Petroleum, coal and natural gas are fossil fuels.
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संबंधित प्रश्न
Explain the process of formation of petroleum.
Fill in the following blanks with suitable words :
LPG is a ........... fuel but biogas is not a..........fuel.
Name the products of combustion of fossil fuels like coal and petroleum products. How do they affect us and our environment?
There are two important fuels A and B both of which are extracted from deep inside the earth. Fuel A is a thick, dark, foul smelling liquid whereas fuel B is a black solid. Combustion of both the fuels produces products, C, D, E and F. The product C makes the rainwater only slightly acidic but it is mainly responsible for causing global warming. The product D is neither acidic nor basic. It is harmless and does not affect the environment in any way. Both E and F attack breathing system of humans and are mainly responsible for causing acid rain. In addition to combustion of fuels A and B, the product F is also formed when lightning occurs in the sky.
(a) What are (i) fuel A, and (ii) fuel B?
(b) Name (i) C (ii) D (iii) E, and (iv) F
(c) What is the process of formation of F during lightning known as?
(d) Which fuel is supposed to be exhausted sooner : A or B?
(e) Which fuel is mostly used for generating electricity at thermal power plants?
A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.
(a) Name the device X.
(b) What is the source of energy which cooks food in this device?
(c) What is the name of the process which traps energy in this device?
(d) State one advantage (other than saving on fuel) or using such a device for cooking food.
List the products of combustion of fossil fuels. What are their adverse effects on the environment?
What are fossil fuels?
What measures would you take to conserve electricity in your house?
Name the petroleum product used as fuel for stoves, lamps and jet aircrafts.
Excessive burning of fossil fuels is a major cause of ______.
