General Science problems
- 1. Which process removes carbon dioxide from the atmosphere?
Options- A. Combustion
- B. Photosynthesis
- C. Respiration
- D. All of the above Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: Photosynthesis
Explanation:
Photosynthesis process removes carbon dioxide from the atmosphere. Green plants remove carbon dioxide from the atmosphere by photosynthesis.
The level of carbon dioxide in the atmosphere is maintained by several processes, including photosynthesis, respiration and combustion.
- 2. Biogeochemical cycles are crucial to ecosystem function because
Options- A. they keep the planet warm enough for living things to survive
- B. energy flows through ecosystems in one direction only and is eventually dissipated as heat
- C. they prevent catastrophic extinctions
- D. nutrients and other life-sustaining molecules are in limited supply and must be continually recycled Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: nutrients and other life-sustaining molecules are in limited supply and must be continually recycled
Explanation:
Biogeochemical cycles are crucial to ecosystem function because ::
1. Chemical elements are available in only limited amounts and must be recycled.
2. Nutrients and other life-sustaining molecules are in limited supply and must be continually recycled.
- 3. Which of the following is a function of the geosphere?
Options- A. providing a moderate, livable climate
- B. serving as the interface between the other spheres
- C. facilitating the movement of water through spheres through transpiration
- D. facilitating the process of photosynthesis Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: serving as the interface between the other spheres
Explanation:
The geosphere is the earth's solid rock or rigid outer layer known as the crust. Without the geosphere it would not be possible for humans to live on the planet. The function of the geosphere serving as the interface between the other spheres.
- 4. Photosynthesis contributes to plant growth by
Options- A. taking in carbon dioxide and making carbohydrates (sugars)
- B. converting sugar to oxygen and water
- C. taking in oxygen and making wood
- D. synthesizing carbon dioxide and making cellulose Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: taking in carbon dioxide and making carbohydrates (sugars)
Explanation:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.
- 5. Which of the following statements about water is false?
Options- A. There is extensive intramolecular hydrogen bonding in the condensed phase.
- B. Water is oxidized to oxygen during photosynthesis.
- C. Ice formed by heavy water sinks in normal water.
- D. Water can act both as an acid and as a base. Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: There is extensive intramolecular hydrogen bonding in the condensed phase.
Explanation:
Water possess intermolecular hydrogen bonding in the condensed phase.
Hence, the given statement 'There is extensive intramolecular hydrogen bonding in the condensed phase.' about water is FALSE.
- 6. The main products of photosynthesis are
Options- A. Oxygen
- B. Sugar
- C. Both A & B
- D. Carbon dioxide Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Both A & B
Explanation:
The two main products of photosynthesis are sugar and oxygen. Oxygen is emitted as waste product and sugar is used for energy preparation using sun light.
- 7. Which type of doctor specializes in teeth and jaw alignment?
Options- A. Orthodontist
- B. Pediatrician
- C. Psychiatrist
- D. Oncologist Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Orthodontist
Explanation:
An orthodontist is the type of doctor that specializes in teeth and jaw alignment. When the teeth don't align properly, it can cause uneven wear in the teeth.
The jaw is a hinge joint. Strong muscles in the face open and close the jaw. Teeth are implanted in the jaw and serve to rip, tear and crush food in preparation for swallowing it.
- 8. A homogeneous mixture is also called
Options- A. Compound
- B. Pure substance
- C. Solution
- D. None of the above Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Solution
Explanation:
A homogeneous mixture is also called as solution.
The term "solution" is more frequently used when a homogeneous mixture is a liquid, although it is sometimes used if the homogeneous mixture is a gas.
Another name for a solid homogeneous mixture of metals is an alloy.
- 9. Which of the following is a property of water?
Options- A. High polarity
- B. Universal solvent
- C. High specific heat
- D. All of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: All of the above
Explanation:
Yes, we know that water is a universal solvent.
Water can moderate temperature because of the two properties: high-specific heat and the high heat of vaporization.
Water is a polar molecule that has a high level of polarity and attraction to ions and other polar molecules.
Hence, all the above given options are the properties of water.
- 10. Which of the following is true of a scientific theory?
Options- A. It is only accepted after the person who came up with it has died.
- B. It is a method or device that applies scientific knowledge for some specific purpose.
- C. It generates testable hypotheses, is supported by a large body of evidence, and is broad in scope.
- D. It must demonstrate the effect of one variable by testing control groups and experimental groups. Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: It generates testable hypotheses, is supported by a large body of evidence, and is broad in scope.
Explanation:
A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world. Scientific theories are not ever proved in the sense of being proved to be 100% correct.
Examples of some scientific theories are ::
Evolution, gravity, atomic theory, the germ theory of disease, relativity, quantum theory, electromagnetic theory, layered Earth theory, etc...
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