Science Practice Quiz 242

Q1.What is the process of separation of different constituents from petroleum called?

A. Refining B. Extraction C. Separation D. Purification

Q2.Which of the following is the least polluting fuel for vehicles?

A. Petrol B. Diesel C. CNG D. LPG

Q3.What is the process called when a substance reacts with oxygen to give off heat?

A. Respiration B. Combustion C. Decomposition D. Fermentation

Q4.What type of materials can be used as fuels?

A. Only solid materials B. Only liquid materials C. Only gas materials D. Solid, liquid or gas materials

Q5.What is produced during the combustion of coal?

A. Carbon monoxide, heat and light B. Carbon dioxide, heat and light C. Nitrogen, heat and light D. Oxygen, heat and light

Q6.What is an example of a fuel that burns with a flame?

A. Coal B. Charcoal C. Candle D. Wood

Q7.What is the byproduct of the combustion of magnesium?

A. Magnesium oxide and heat B. Magnesium oxide and light C. Magnesium oxide, heat and light D. Magnesium and oxygen

Q8.What happens when a piece of burning wood or charcoal is covered with a glass jar or a tumbler?

A. It burns more intensely B. It stops burning after sometime C. It melts the glass jar D. It produces more smoke

Q9.Why does covering a person whose clothes have caught fire with a blanket help to extinguish the fire?

A. Because the blanket is made of fire-resistant material B. Because the blanket cuts off the oxygen supply C. Because the blanket cools down the person's body D. Because the blanket melts and puts out the fire

Q10.How does the sun produce its own heat and light?

A. Through a chemical reaction B. Through a physical reaction C. Through nuclear reactions D. Through a biological process

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Science Practice Quiz 242