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प्रश्न
Choose the correct answer.
Windmills have been used for many centuries in
विकल्प
the USA
the Netherlands
Russia
India
उत्तर
Windmills have been used for many centuries in the Netherlands
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संबंधित प्रश्न
What is a source of energy? What are the two main categories of the sources of energy?
What is meant by a non-renewable source of energy? Give two examples of non-renewable source of energy.
Name two sources of energy which you consider to be non-renewable. Give reason for your choice.
Explain why, natural gas is considered to be a good fuel.
What are the various steps which can be taken to control (or reduce) pollution caused by burning fossil fuels?
The aviation fuel which is used in the engines of jet aeroplanes is:
(a) diesel
(b) kerosene
(c) petrol
(d) CNG
The ultimate source of energy stored in fossil fuels is:
(a) moon
(b) earth
(c) sun
(d) sea
A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinder easy.
Name the substance X.
Name the original source of wind energy.
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 fossil fuel whose known reserves in the earth are expected to last for the minimum period is:
(a) coal
(b) uranium
(c) petroleum
(d) natural gas
You have three unlabelled test tubes containing ethanol, ethanoic acid and soap solution. Explain the method you would use to identify the compounds in different test tubes by chemical tests using litmus paper and sodium metal.
What are non-renewable resources of energy? Give two examples of such resources.
Fill in the blank
__________ are examples of renewable energy resources.
Name a few major producers of petroleum in the world.
Describe the four major types of coal.
Various materials which are obtained from nature are called natural resources. Which of the following is not a natural resource?
Exhaustible natural resources are
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 |
