Lakhmir Singh & Manjit Kaur - Physics

Book: Lakhmir Singh & Manjit Kaur - Physics

Chapter: 3. Sources of Energy

Subject: Physics - Class 10th

Q. No. 37 of Questions Based on High Order Thinking Skills (HOTS)-Pg-132

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Fossil fuels are energy rich compounds of an element X which were originally made by the plants with the help of sun’s energy.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

(a) X is carbon

(b) Hydrogen is another element which is usually found in combination with carbon in Fossil fuels.


37

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Fossil fuels are energy rich compounds of an element X which were originally made by the plants with the help of sun’s energy.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