UPSC Static Quiz – Geography : 18 February 2026

UPSC Static Quiz – Geography : 18 February 2026 We will post 5 questions daily on static topics mentioned in the UPSC civil services preliminary examination syllabus. Each week will focus on a specific topic from the syllabus, such as History of India and Indian National Movement, Indian and World Geography, and more. We are excited to bring you our daily UPSC Static Quiz, designed to help you prepare for the UPSC Civil Services Preliminary Examination. Each day, we will post 5 questions on static topics mentioned in the UPSC syllabus. This week, we are focusing on Indian and World Geography.

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• Question 1 of 5 1. Question Consider the following statements regarding the classification of minor solar system bodies: Asteroids are predominantly composed of volatile icy compounds and dust, whereas comets are primarily composed of silicate rocks and heavy metals. The “coma” and “tail” of a comet are permanent features that exist regardless of the comet’s distance from the Sun. Which of the above statements are incorrect? (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2 Correct Solution: C Statement 1 is incorrect. Asteroidsare rocky, airless worlds that orbit our Sun, composed primarily of silicates and metals (like nickel and iron) because they formed in the inner solar system (inside the frost line) where it was too warm for ices to remain solid. Comets, conversely, are cosmic “snowballs” of frozen gases (volatiles), rock, and dust that formed in the cold outer solar system. Statement 2 is incorrect. Comets do not have permanent comas or tails. These features are transient phenomena that only develop when the comet’s orbit brings it close to the Sun (typically within the orbit of Mars). The solar heat causes the frozen gases to sublime (turn directly from solid to gas), creating the fuzzy coma and the streaming tails. When a comet is in the distant outer solar system (e.g., the Kuiper Belt or Oort Cloud), it remains a frozen, dormant nucleus without a tail. Incorrect Solution: C Statement 1 is incorrect. Asteroidsare rocky, airless worlds that orbit our Sun, composed primarily of silicates and metals (like nickel and iron) because they formed in the inner solar system (inside the frost line) where it was too warm for ices to remain solid. Comets, conversely, are cosmic “snowballs” of frozen gases (volatiles), rock, and dust that formed in the cold outer solar system. Statement 2 is incorrect. Comets do not have permanent comas or tails. These features are transient phenomena that only develop when the comet’s orbit brings it close to the Sun (typically within the orbit of Mars). The solar heat causes the frozen gases to sublime (turn directly from solid to gas), creating the fuzzy coma and the streaming tails. When a comet is in the distant outer solar system (e.g., the Kuiper Belt or Oort Cloud), it remains a frozen, dormant nucleus without a tail.

#### 1. Question

Consider the following statements regarding the classification of minor solar system bodies:

• Asteroids are predominantly composed of volatile icy compounds and dust, whereas comets are primarily composed of silicate rocks and heavy metals.

• The “coma” and “tail” of a comet are permanent features that exist regardless of the comet’s distance from the Sun.

Which of the above statements are incorrect?

• (a) 1 only

• (b) 2 only

• (c) Both 1 and 2

• (d) Neither 1 nor 2

Solution: C

• Statement 1 is incorrect. Asteroidsare rocky, airless worlds that orbit our Sun, composed primarily of silicates and metals (like nickel and iron) because they formed in the inner solar system (inside the frost line) where it was too warm for ices to remain solid. Comets, conversely, are cosmic “snowballs” of frozen gases (volatiles), rock, and dust that formed in the cold outer solar system.

Statement 2 is incorrect. Comets do not have permanent comas or tails. These features are transient phenomena that only develop when the comet’s orbit brings it close to the Sun (typically within the orbit of Mars). The solar heat causes the frozen gases to sublime (turn directly from solid to gas), creating the fuzzy coma and the streaming tails. When a comet is in the distant outer solar system (e.g., the Kuiper Belt or Oort Cloud), it remains a frozen, dormant nucleus without a tail.

Solution: C

• Question 2 of 5 2. Question Match the following minerals with their primary industrial application: Mineral Application 1. Barytes A. Piezoelectric oscillators 2. Feldspar B. Drilling mud weighting agent 3. Quartz C. Flux in glass and ceramics 4. Bentonite D. Iron ore pelletization/bonding Select the correct matching using the code given below: (a) 1-D, 2-C, 3-A, 4-B (b) 1-C, 2-B, 3-D, 4-A (c) 1-B, 2-A, 3-C, 4-D (d) 1-B, 2-C, 3-A, 4-D Correct Solution: D Barytes (1-B): Barytes (Barium Sulfate) has a high specific gravity (approx. 4.5). This high density makes it ideal for use in the oil and gas industry as a weighting agent in drilling muds. It suppresses high formation pressures and prevents blowouts. It is also used in radiation shielding. Feldspar (2-C): Feldspar is the primary fluxing agent used in the ceramic and glass industries. A flux lowers the melting temperature of the mixture (silica/clay), saving energy and ensuring a vitreous (glassy) bond in the final product. It constitutes a significant portion of the batch in glassmaking. Quartz (3-A): Quartz crystals exhibit the piezoelectric effect, meaning they generate an electric charge when mechanically stressed and vibrate at a precise frequency when electricity is applied. This property makes them essential for oscillators in watches, clocks, and modern electronics. Bentonite (4-D): Bentonite is a swelling clay (montmorillonite). It is widely used as a bonding agent (binder) in the production of iron ore pellets and in foundry sands due to its ability to absorb water and bind particles together. Incorrect Solution: D Barytes (1-B): Barytes (Barium Sulfate) has a high specific gravity (approx. 4.5). This high density makes it ideal for use in the oil and gas industry as a weighting agent in drilling muds. It suppresses high formation pressures and prevents blowouts. It is also used in radiation shielding. Feldspar (2-C): Feldspar is the primary fluxing agent used in the ceramic and glass industries. A flux lowers the melting temperature of the mixture (silica/clay), saving energy and ensuring a vitreous (glassy) bond in the final product. It constitutes a significant portion of the batch in glassmaking. Quartz (3-A): Quartz crystals exhibit the piezoelectric effect, meaning they generate an electric charge when mechanically stressed and vibrate at a precise frequency when electricity is applied. This property makes them essential for oscillators in watches, clocks, and modern electronics. Bentonite (4-D): Bentonite is a swelling clay (montmorillonite). It is widely used as a bonding agent (binder) in the production of iron ore pellets and in foundry sands due to its ability to absorb water and bind particles together.

#### 2. Question

Match the following minerals with their primary industrial application:

Mineral | Application

1.Barytes | A. Piezoelectric oscillators
2.Feldspar | B. Drilling mud weighting agent
3.Quartz | C. Flux in glass and ceramics
4.Bentonite | D. Iron ore pelletization/bonding

Select the correct matching using the code given below:

• (a) 1-D, 2-C, 3-A, 4-B

• (b) 1-C, 2-B, 3-D, 4-A

• (c) 1-B, 2-A, 3-C, 4-D

• (d) 1-B, 2-C, 3-A, 4-D

Solution: D

• Barytes (1-B): Barytes (Barium Sulfate) has a high specific gravity (approx. 4.5). This high density makes it ideal for use in the oil and gas industry as a weighting agent in drilling muds. It suppresses high formation pressures and prevents blowouts. It is also used in radiation shielding.

• Feldspar (2-C): Feldspar is the primary fluxing agent used in the ceramic and glass industries. A flux lowers the melting temperature of the mixture (silica/clay), saving energy and ensuring a vitreous (glassy) bond in the final product. It constitutes a significant portion of the batch in glassmaking.

• Quartz (3-A): Quartz crystals exhibit the piezoelectric effect, meaning they generate an electric charge when mechanically stressed and vibrate at a precise frequency when electricity is applied. This property makes them essential for oscillators in watches, clocks, and modern electronics.

• Bentonite (4-D): Bentonite is a swelling clay (montmorillonite). It is widely used as a bonding agent (binder) in the production of iron ore pellets and in foundry sands due to its ability to absorb water and bind particles together.

Solution: D

• Question 3 of 5 3. Question Consider the following statements regarding Sleet and Freezing Rain: Statement I: Sleet reaches the ground as frozen ice pellets, whereas freezing rain reaches the ground as supercooled liquid. Statement II: The formation of sleet requires the falling raindrop to traverse a deep layer of sub-freezing air near the surface, while freezing rain occurs when this layer is shallow. Which one of the following is correct in respect of the above statements? (A) Both Statement I and Statement II are correct and Statement II is the correct explanation for Statement I. (B) Both Statement I and Statement II are correct and Statement II is not the correct explanation for Statement I. (C) Statement I is correct but Statement II is incorrect. (D) Statement I is incorrect but Statement II is correct. Correct Solution: A Both statements accurately describe the physical processes involved in the formation of sleet and freezing rain, and Statement II correctly explains Statement I. In both phenomena, precipitation typically begins as snow in the upper cold layers of the atmosphere. As it falls, it passes through a warm layer aloft where it melts into rain. What happens next depends on the thickness and temperature of the cold layer near the surface. For sleet, this near-surface sub-freezing layer is sufficiently deep and cold to allow the raindrops to refreeze completely before reaching the ground, resulting in small ice pellets. In contrast, freezing rain occurs when the cold layer near the surface is shallow. In this case, raindrops become supercooled—remaining liquid despite temperatures below 0 °C—and freeze instantly upon contact with exposed surfaces such as roads, trees, or power lines, forming a glaze of ice. Incorrect Solution: A Both statements accurately describe the physical processes involved in the formation of sleet and freezing rain, and Statement II correctly explains Statement I. In both phenomena, precipitation typically begins as snow in the upper cold layers of the atmosphere. As it falls, it passes through a warm layer aloft where it melts into rain. What happens next depends on the thickness and temperature of the cold layer near the surface. For sleet, this near-surface sub-freezing layer is sufficiently deep and cold to allow the raindrops to refreeze completely before reaching the ground, resulting in small ice pellets. In contrast, freezing rain occurs when the cold layer near the surface is shallow. In this case, raindrops become supercooled—remaining liquid despite temperatures below 0 °C—and freeze instantly upon contact with exposed surfaces such as roads, trees, or power lines, forming a glaze of ice.

#### 3. Question

Consider the following statements regarding Sleet and Freezing Rain:

Statement I: Sleet reaches the ground as frozen ice pellets, whereas freezing rain reaches the ground as supercooled liquid.

Statement II: The formation of sleet requires the falling raindrop to traverse a deep layer of sub-freezing air near the surface, while freezing rain occurs when this layer is shallow.

Which one of the following is correct in respect of the above statements?

• (A) Both Statement I and Statement II are correct and Statement II is the correct explanation for Statement I.

• (B) Both Statement I and Statement II are correct and Statement II is not the correct explanation for Statement I.

• (C) Statement I is correct but Statement II is incorrect.

• (D) Statement I is incorrect but Statement II is correct.

Solution: A

• Both statements accurately describe the physical processes involved in the formation of sleet and freezing rain, and Statement II correctly explains Statement I.

• In both phenomena, precipitation typically begins as snow in the upper cold layers of the atmosphere. As it falls, it passes through a warm layer aloft where it melts into rain. What happens next depends on the thickness and temperature of the cold layer near the surface.

For sleet, this near-surface sub-freezing layer is sufficiently deep and cold to allow the raindrops to refreeze completely before reaching the ground, resulting in small ice pellets. In contrast, freezing rain occurs when the cold layer near the surface is shallow. In this case, raindrops become supercooled—remaining liquid despite temperatures below 0 °C—and freeze instantly upon contact with exposed surfaces such as roads, trees, or power lines, forming a glaze of ice.

Solution: A

• Both statements accurately describe the physical processes involved in the formation of sleet and freezing rain, and Statement II correctly explains Statement I.

• Question 4 of 5 4. Question Consider the following statements regarding the conditions favorable for the formation of Dew: Cloudy skies are essential to trap terrestrial radiation and keep the surface warm. Strong winds are required to continuously bring fresh moisture-laden air to the ground surface. The dew point temperature must be above 0°C. How many of the above statements are incorrect? (a) Only one (b) Only two (c) All three (d) None Correct Solution: B Statement 1 is incorrect:For dew to form, the ground needs to cool down rapidly to reach the dew point. Clear skies are required for this, as they allow “radiational cooling” (heat escaping to space). Cloudy skies act as a blanket, radiating heat back to the ground and preventing necessary cooling. Statement 2 is incorrect:Calm air is preferred. Strong winds cause turbulence, mixing the cold air near the ground with warmer air from above. This mixing prevents the surface layer from cooling sufficiently to reach saturation. Statement 3 is correct:This is the defining distinction between Dew and Frost. For liquid dew to form, the condensation must occur at a temperature above 0°C. If the dew point is below freezing, water vapor deposits directly as ice (Frost). Incorrect Solution: B Statement 1 is incorrect:For dew to form, the ground needs to cool down rapidly to reach the dew point. Clear skies are required for this, as they allow “radiational cooling” (heat escaping to space). Cloudy skies act as a blanket, radiating heat back to the ground and preventing necessary cooling. Statement 2 is incorrect:Calm air is preferred. Strong winds cause turbulence, mixing the cold air near the ground with warmer air from above. This mixing prevents the surface layer from cooling sufficiently to reach saturation. Statement 3 is correct:This is the defining distinction between Dew and Frost. For liquid dew to form, the condensation must occur at a temperature above 0°C. If the dew point is below freezing, water vapor deposits directly as ice (Frost).

#### 4. Question

Consider the following statements regarding the conditions favorable for the formation of Dew:

• Cloudy skies are essential to trap terrestrial radiation and keep the surface warm.

• Strong winds are required to continuously bring fresh moisture-laden air to the ground surface.

• The dew point temperature must be above 0°C.

How many of the above statements are incorrect?

• (a) Only one

• (b) Only two

• (c) All three

Solution: B

• Statement 1 is incorrect:For dew to form, the ground needs to cool down rapidly to reach the dew point. Clear skies are required for this, as they allow “radiational cooling” (heat escaping to space). Cloudy skies act as a blanket, radiating heat back to the ground and preventing necessary cooling.

• Statement 2 is incorrect:Calm air is preferred. Strong winds cause turbulence, mixing the cold air near the ground with warmer air from above. This mixing prevents the surface layer from cooling sufficiently to reach saturation.

• Statement 3 is correct:This is the defining distinction between Dew and Frost. For liquid dew to form, the condensation must occur at a temperature above 0°C. If the dew point is below freezing, water vapor deposits directly as ice (Frost).

Solution: B

• Question 5 of 5 5. Question Consider the following statements regarding Deep-water corals. Statement I: Deep-water corals are widely distributed in the Atlantic Ocean and can form large reef structures at depths exceeding 1,000 meters. Statement II: Deep-water corals rely on a symbiotic relationship with Zooxanthellae to produce energy through chemosynthesis in the absence of sunlight. Which one of the following is correct in respect of the above statements? (a) Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I (b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I (c) Statement-I is correct but Statement-II is incorrect (d) Statement-I is incorrect but Statement-II is correct Correct Solution: C Statement I is correct:Deep-water corals, such as Lophelia pertusa, are widely distributed, particularly in the North Atlantic (e.g., off the coast of Norway and the UK). They form massive, complex carbonate structures (bioherms) that can rival shallow reefs in size. They are found at depths ranging from 40 meters to over 1,000 meters (and other species up to 6,000 meters). Statement II is incorrect: Deep-water corals do not possess Zooxanthellae. Zooxanthellae are photosynthetic algae that require sunlight; they cannot survive in the aphotic (dark) zones of the deep ocean. Deep-water corals do not use chemosynthesis; they are heterotrophic suspension feeders. They rely on capturing organic particulate matter (“marine snow”) and zooplankton brought to them by ocean currents. The energy production mechanism described is false. Incorrect Solution: C Statement I is correct:Deep-water corals, such as Lophelia pertusa, are widely distributed, particularly in the North Atlantic (e.g., off the coast of Norway and the UK). They form massive, complex carbonate structures (bioherms) that can rival shallow reefs in size. They are found at depths ranging from 40 meters to over 1,000 meters (and other species up to 6,000 meters). Statement II is incorrect: Deep-water corals do not possess Zooxanthellae. Zooxanthellae are photosynthetic algae that require sunlight; they cannot survive in the aphotic (dark) zones of the deep ocean. Deep-water corals do not use chemosynthesis; they are heterotrophic suspension feeders. They rely on capturing organic particulate matter (“marine snow”) and zooplankton brought to them by ocean currents. The energy production mechanism described is false.

#### 5. Question

Consider the following statements regarding Deep-water corals.

Statement I: Deep-water corals are widely distributed in the Atlantic Ocean and can form large reef structures at depths exceeding 1,000 meters.

Statement II: Deep-water corals rely on a symbiotic relationship with Zooxanthellae to produce energy through chemosynthesis in the absence of sunlight.

Which one of the following is correct in respect of the above statements?

• (a) Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I

• (b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I

• (c) Statement-I is correct but Statement-II is incorrect

• (d) Statement-I is incorrect but Statement-II is correct

Solution: C

• Statement I is correct:Deep-water corals, such as Lophelia pertusa, are widely distributed, particularly in the North Atlantic (e.g., off the coast of Norway and the UK). They form massive, complex carbonate structures (bioherms) that can rival shallow reefs in size. They are found at depths ranging from 40 meters to over 1,000 meters (and other species up to 6,000 meters).

Statement II is incorrect: Deep-water corals do not possess Zooxanthellae. Zooxanthellae are photosynthetic algae that require sunlight; they cannot survive in the aphotic (dark) zones of the deep ocean. Deep-water corals do not use chemosynthesis; they are heterotrophic suspension feeders. They rely on capturing organic particulate matter (“marine snow”) and zooplankton brought to them by ocean currents. The energy production mechanism described is false.

Solution: C

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