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प्रश्न
Who is the odd one out?
विकल्प
Leaving the fan on in a vacant room
Leaving the TV on while working
Using AC during winter
Putting off the light when going out
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उत्तर
Putting off the light when going out
Explanation:
Putting off the light when going out is the odd one out as it is one of the measures of saving energy. The rest involves waste of energy.
संबंधित प्रश्न
Compare and contrast fossil fuels and the Sun as direct sources of energy
The calorific values of three fuels A, B and C are 33 kJ/g, 48 kJ/g and 150 kJ/g, respectively. A is solid, B is liquid and C is a gas at room temperature. One combustion, both A and B produce carbon dioxide while C explodes forming steam. B and C leave no residue after combustion while A leaves behind some solid residue. Which one of the three fuels is the most ideal? Give two reasons to support your answer.
Name the component which is found in natural gas well as in biogas.
Which of the following is not a fossil source of energy?
(a) kerosene oil
(b) cow-dung cakes
(c) CNG
(d) coal
What are the two ways in which cow-dung can be used as a fuel? Which of them is better and why?
The constituent of biogas which makes it an excellent fuel is:
(a) butane
(b) methane
(c) propane
(d) ethane
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
Name a few major producers of petroleum in the world.
Name two forms of sea energy.
Tidal energy is ______ type of energy.
