General knowledge MCQ – Change your future

661. What is the name of the Earth's largest ocean? [SBI Clerk Examination-1991]

Correct Answer: Correct answer is: (B) The Pacific.

Exam Relevance: SBI Clerk Examination, UPSC, SSC, Bank PO

Difficulty: Very Easy

Concept notes: The Pacific Ocean is the largest and deepest of Earth's oceanic divisions.

Common Mistakes: Students may confuse the Pacific Ocean with the Atlantic Ocean, which is the second-largest ocean.

Explanations: The Pacific Ocean covers approximately 63 million square miles, making it the largest ocean on Earth. It is located between the Americas to the east and Asia and Australia to the west.

Option Analysis:

Option A: The Atlantic Ocean is the second-largest ocean, not the largest.
Option B: The Pacific Ocean is the largest ocean on Earth.
Option C: The Indian Ocean is the third-largest ocean, not the largest.
Option D: The Arctic Ocean is the smallest and shallowest of the world's five major oceans, not the largest.

Mnemonic: P for Pacific, P for Primary (largest).

662. What is the harm from the depletion of Earth's ozone layer? [General Knowledge for IBPS Clerk (CWE Clerical) Examination-1993]

Correct Answer: Correct answer is: (C) Increased amount of Ultra violet radiation will reach earth's surface.

Exam Relevance: IBPS Clerk, UPSC, SSC, GRE

Difficulty: Moderate

Concept notes: The ozone layer in the stratosphere absorbs most of the sun's ultraviolet (UV) radiation, protecting life on Earth from harmful UV rays.

Common Mistakes: Students may confuse the effects of ozone depletion with global warming, leading to incorrect choices.

Explanations: The ozone layer in the stratosphere absorbs most of the sun's ultraviolet (UV) radiation, which is harmful to living organisms. When the ozone layer is depleted, more UV radiation reaches the Earth's surface. This increased UV radiation can lead to various health and environmental issues, such as skin cancer, cataracts, and damage to crops and marine life.

Option Analysis:

Option A: The average temperature of Earth's surface will increase gradually. This is not directly related to ozone depletion but rather to greenhouse gases and global warming.
Option B: The oxygen content of the atmosphere will decrease. Ozone depletion does not significantly affect the overall oxygen content of the atmosphere.
Option C: Increased amount of Ultra violet radiation will reach Earth's surface. This is the correct answer as ozone depletion allows more UV radiation to reach the Earth's surface.
Option D: Sea levels will rise as the polar ice caps will gradually melt. This is related to global warming and not directly to ozone depletion.

Mnemonic: Ozone Out, UV In

663. Where is Raman Research Institute situated? [SSC CHSL Examination-1991]

Correct Answer: Correct answer is: (C) Bengaluru.

Exam Relevance: SSC CHSL, UPSC, Bank PO, Civil Services

Difficulty: Easy

Concept notes: The Raman Research Institute is a premier research institute in India, known for its contributions to the field of physics and other sciences.

Common Mistakes: Students might confuse the location of the Raman Research Institute with other major research institutions in India, such as the Indian Institute of Science, which is also located in Bengaluru.

Explanations: The Raman Research Institute is situated in Bengaluru, Karnataka, India. It was founded by Sir C.V. Raman, a Nobel laureate in Physics. The institute is dedicated to research in various fields of science and technology.

Option Analysis:

Option A: Mumbai is incorrect as the Raman Research Institute is not located there.
Option B: New Delhi is incorrect as the Raman Research Institute is not located there.
Option C: Bengaluru is the correct location of the Raman Research Institute.
Option D: Kolkata is incorrect as the Raman Research Institute is not located there.

Mnemonic: RRI in B'lore, Raman's lore.

664. In which year WTO came into being? [Indian Ordnance Factories Service (IOFS) Examination-1980]

Correct Answer: Correct answer is: (B) 1995.

Exam Relevance: UPSC, Civil Services, Bank PO, SSC, Competitive Exams

Difficulty: Easy

Concept notes: The World Trade Organization (WTO) was established in 1995 as the successor to the General Agreement on Tariffs and Trade (GATT).

Common Mistakes: Students may confuse the establishment year of the WTO with other significant years in international trade history, such as the year GATT was signed (1947).

Explanations: The World Trade Organization (WTO) was officially established on January 1, 1995, following the conclusion of the Uruguay Round of negotiations. This marked the formal transition from the GATT, which had been in place since 1947, to a more comprehensive and legally binding organization dedicated to regulating international trade.

Option Analysis:

Option A: 1990 is incorrect as the WTO was not established until 1995.
Option B: 1995 is the correct year when the WTO was officially established.
Option C: 2000 is incorrect as the WTO was already established by this time.
Option D: 2005 is incorrect as the WTO was established a decade earlier.

Mnemonic: WTO-95: Remember the WTO was established in '95.

665. "Caracas" is the capital of [University Grants Commission Examination-1981]

Correct Answer: Correct answer is: (D) Venezuela.

Exam Relevance: UPSC, GRE, GMAT, Civil Services

Difficulty: Very Easy

Concept notes: Caracas is the capital city of Venezuela.

Common Mistakes: Students might confuse Caracas with other capital cities of South American countries.

Explanations: Caracas is the capital and largest city of Venezuela. It is located in the northern part of the country, in the valley of the Guaire River. The other options listed are incorrect as they refer to different countries or cities.

Option Analysis:

Option A: Hanoi is the capital of Vietnam, not Venezuela.
Option B: Reykjavik is the capital of Iceland, not Venezuela.
Option C: Portugal is a country, not a capital city. Lisbon is the capital of Portugal.
Option D: Caracas is the capital of Venezuela.

Mnemonic: C for Caracas, C for Capital, V for Venezuela.

666. Gabion structure are [RBI Grade B Officer Examination-1986]

Correct Answer: Correct answer is: (C) Both.

Exam Relevance: RBI Grade B Officer Examination, Civil Services Examination, GATE Civil Engineering

Difficulty: Moderate

Concept notes: Gabion structures are both flexible and permeable. They are flexible because they can adapt to ground movements and deformations without losing their structural integrity. They are permeable because water can pass through the gaps in the wire mesh and the spaces between the stones, allowing for drainage.

Common Mistakes: Students may mistakenly believe that gabion structures are rigid and impermeable, similar to concrete structures.

Explanations: Gabion structures are made of wire mesh baskets filled with stones. The wire mesh allows the structure to be flexible, adapting to ground movements and deformations. The permeability of gabion structures is due to the open nature of the wire mesh and the spaces between the stones, which allow water to pass through. This dual characteristic of flexibility and permeability makes gabion structures suitable for various civil engineering applications, such as retaining walls and erosion control.

Option Analysis:

Option A: Gabion structures are indeed flexible, but this option does not account for their permeability.
Option B: Gabion structures are permeable, but this option does not account for their flexibility.
Option C: This option correctly identifies that gabion structures are both flexible and permeable.
Option D: This option is incorrect as gabion structures do possess both flexibility and permeability.

Mnemonic: Flexi-Perm Gabion

667. Who's resignation means the resignation of the entire Council of Ministers? [Kerala Postal Circle Examination-1983]

Correct Answer: Correct answer is: (D) Prime minister.

Exam Relevance: UPSC, SSC, State PSC

Difficulty: Moderate

Concept notes: In the Indian political system, the Prime Minister is the head of the government and the leader of the Council of Ministers. The resignation of the Prime Minister typically leads to the dissolution of the entire Council of Ministers.

Common Mistakes: Students may confuse the roles of the President and Prime Minister, as both hold significant positions in the government.

Explanations: The Prime Minister is the head of the government and the leader of the Council of Ministers. When the Prime Minister resigns, it is customary for the entire Council of Ministers to resign as well, as they are collectively responsible to the Parliament. This resignation is a constitutional convention and ensures the stability and continuity of the government.

Option Analysis:

Option A: The President is the head of state, not the head of government, and their resignation does not affect the Council of Ministers directly.
Option B: The Vice President does not lead the Council of Ministers and their resignation does not impact the Council.
Option C: The State Legislative Assembly is a state-level body and its actions do not directly affect the Council of Ministers at the national level.
Option D: The Prime Minister's resignation leads to the resignation of the entire Council of Ministers due to collective responsibility.

Mnemonic: Prime Minister, Prime Resignation

668. Where are the world's tallest mountains? [Indian Police Service (IPS) Examination-1983]

Correct Answer: Correct answer is: (A) Himalayas.

Exam Relevance: Indian Police Service (IPS), Civil Services, UPSC

Difficulty: Easy

Concept notes: The Himalayas are home to the world's tallest mountains, including Mount Everest, which is the highest peak above sea level.

Common Mistakes: Students may confuse the Hindu Kush with the Himalayas, as both are mountain ranges in Asia.

Explanations: The Himalayas contain the world's tallest mountains, including Mount Everest, which stands at 8,848 meters (29,029 feet) above sea level. The Hindu Kush, while a significant mountain range, does not contain the world's tallest peaks.

Option Analysis:

Option A: Correct. The Himalayas contain the world's tallest mountains.
Option B: Incorrect. The Hindu Kush does not contain the world's tallest mountains.
Option C: Incorrect. The Himalayas are the correct answer, not the Hindu Kush.
Option D: Incorrect. The Himalayas are the correct answer.

Mnemonic: H for Himalayas, H for Highest.

669. Acid Rain is caused due to the presence of the folloiwng gases in the air? [General Knowledge for Jharkhand Police Examination-1992]

Correct Answer: Correct answer is: (C) SO2 and NO2.

Exam Relevance: Jharkhand Police Examination, UPSC, SSC, Banking Exams

Difficulty: Moderate

Concept notes: Acid rain is caused by the presence of sulfur dioxide (SO2) and nitrogen dioxide (NO2) in the atmosphere. These gases react with water, oxygen, and other chemicals to form sulfuric and nitric acids, which then fall as precipitation.

Common Mistakes: Students may confuse the gases responsible for acid rain with other atmospheric pollutants or gases that do not contribute to acid rain formation.

Explanations: Sulfur dioxide (SO2) and nitrogen dioxide (NO2) are the primary gases responsible for acid rain. When these gases are released into the atmosphere, they react with water vapor, oxygen, and other chemicals to form sulfuric and nitric acids. These acids then mix with rain, snow, or fog, resulting in acid rain. The other gases listed do not contribute to the formation of acid rain.

Option Analysis:

Option A: N2 and O3 are not the primary gases responsible for acid rain. Nitrogen (N2) is inert and does not react to form acids, while ozone (O3) is not a significant contributor to acid rain.
Option B: NH3 (ammonia) and Cl2 (chlorine) are not the primary gases responsible for acid rain. While ammonia can react with acids to form ammonium salts, it is not a major contributor to acid rain formation.
Option C: SO2 and NO2 are the correct gases responsible for acid rain. These gases react with water and oxygen in the atmosphere to form sulfuric and nitric acids, which then fall as acid rain.
Option D: O3 and N2 are not the primary gases responsible for acid rain. Nitrogen (N2) is inert and does not react to form acids, while ozone (O3) is not a significant contributor to acid rain.

Mnemonic: SO2 and NO2: "Sour Noses" (Sour for SO2, Noses for NO2)

670. Which instrument is used to measure curvature of spherical objects? [PSC Examination-1991]

Correct Answer: Correct answer is: (B) Spherometer.

Exam Relevance: PSC, UPSC, GATE, GRE

Difficulty: Easy

Concept notes: A spherometer is an instrument used to measure the radius of curvature of spherical surfaces.

Common Mistakes: Students may confuse the spherometer with other instruments like the sextant, which is used for navigation, or the spectrometer, which is used for analyzing light spectra.

Explanations: A spherometer is specifically designed to measure the curvature of spherical objects. It consists of a micrometer screw and three legs that form a small tripod. When placed on a spherical surface, the micrometer screw is adjusted until it just touches the surface, and the reading gives the depth of the spherical surface, which can be used to calculate the radius of curvature.

Option Analysis:

Option A: A sextant is used for navigation and measuring angles between celestial bodies and the horizon, not for measuring curvature.
Option B: A spherometer is the correct instrument for measuring the curvature of spherical objects.
Option C: A spectroscope is used to disperse light into its component wavelengths, not for measuring curvature.
Option D: A spectrometer is used to measure the properties of light, not for measuring curvature.

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General knowledge MCQ - Set 67

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