Lakhmir Singh & Manjit Kaur - Physics

Book: Lakhmir Singh & Manjit Kaur - Physics

Chapter: 3. Sources of Energy

Subject: Physics - Class 10th

Q. No. 38 of Questions Based on High Order Thinking Skills (HOTS)-Pg-132

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38

The energy in petrol originally came from the Sun. Explain how it got into petrol.

Fossil fuels are obtained from remains of animals and plants under the earth over a period of millions of years these existed and grew due to sun's energy thus the ultimate source of fossil fuels can be considered to be the sun's energy.


Chapter Exercises

Very Short Answer Type Questions-Pg-121
Very Short Answer Type Questions-Pg-130
Very Short Answer Type Questions-Pg-140
Very Short Answer Type Questions-Pg-148
Very Short Answer Type Questions-Pg-156
Very Short Answer Type Questions-Pg-161
Short Answer Type Questions-Pg-122
Short Answer Type Questions-Pg-131
Short Answer Type Questions-Pg-140
Short Answer Type Questions-Pg-148
Short Answer Type Questions-Pg-157
Short Answer Type Questions-Pg-161
Questions Based on High Order Thinking Skills (HOTS)-Pg-123
Questions Based on High Order Thinking Skills (HOTS)-Pg-132
Questions Based on High Order Thinking Skills (HOTS)-Pg-142
Questions Based on High Order Thinking Skills (HOTS)-Pg-150
Questions Based on High Order Thinking Skills (HOTS)-Pg-159
Long Answer Type Questions-Pg-122
Long Answer Type Questions-Pg-131
Long Answer Type Questions-Pg-141
Long Answer Type Questions-Pg-149
Long Answer Type Questions-Pg-157
Multiple Choice Questions (MCQs)-Pg-122
Multiple Choice Questions (MCQs)-Pg-131
Multiple Choice Questions (MCQs)-Pg-141
Multiple Choice Questions (MCQs)-Pg-149
Multiple Choice Questions (MCQs)-Pg-158
Multiple Choice Questions (MCQs)-Pg-161

More Exercise Questions

37

Fossil fuels are energy rich compounds of an element X which were originally made by the plants with the help of sun’s energy.

(a) Name the element X


(b) Name another element which is usually found in combination with X in fossil fuels.
38

The energy in petrol originally came from the Sun. Explain how it got into petrol.
39

A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinders easy.

(a) Name the substance X


(b) How does substance X make the detection of leakage of LPG easy?
40

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.

(a) Name the device X


(b) How does this device help in controlling air pollution ?

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