Why does the burning of a tire yield black smoke while burning stoves in homes rarely produce smoke?
Correct answer: C. Combustion of heavy fuels like tires results in incomplete combustion, producing elemental carbon that appears as black smoke.
- A. Burning tires release particles that break off due to heat and create the appearance of black smoke.
- B. The heat from the fire melts tires and the evaporated material contributes to black smoke.
- C. Combustion of heavy fuels like tires results in incomplete combustion, producing elemental carbon that appears as black smoke.
- D. None of the above options are correct.
Explanation
The correct answer is that combustion of heavy fuels like tires results in incomplete combustion, producing elemental carbon that appears as black smoke. Tires are made of materials that do not combust fully under regular fire conditions, leading to the production of soot. This soot is composed of tiny carbon particles that absorb light, giving the smoke its black appearance. In contrast, home stoves usually burn fuels designed to combust more completely, often producing less smoke. Options A and B are incorrect as they do not accurately describe the cause of black smoke, and Option D is incorrect because there is a correct explanation provided.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
Practise Scientific Reasoning
334 free Scientific Reasoning MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Analytical and Logical Reasoning questions like this
Analytical and Logical Reasoning is on 27 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Scientific Reasoning questions
Why is the pupil of the human eye black?
An observer on the ground sees an eagle flying towards thep east at 15m/s chasing a hummingbird flying at 5 m/s. He approximates that the mass of the eagle is 4 times that of the hummingbird. If the eagle catches the hummingbird and continues to fly with the same thrust from its wings, what speed with the observer see them moving at?
The small gear has 10 teeth and the big gear has 50 teeth. When the small gear rolls around the big gear, how many times will the arrow return to its initial orientation (pointing upward)?
When driving a car around a corner, why do we feel as if we are thrown away from the corner?
The figure shows a table where some cutlery is placed on top of a table cloth. When the table cloth is pulled quickly, it is possible that the cutlery lands directly on the same spot on the table and does not get carried away with the cloth. Which of the following serves as a reasonable explanation?
The carpet moves while the dust particles remain stationary due to inertia, causing a separation of dust from the carpet. Why does this happen?