UPSC Static Quiz – Geography : 26 February 2026

UPSC Static Quiz – Geography : 26 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 Arrange the following parts of a comet from the center outward: Coma Nucleus Hydrogen Envelope Select the correct answer using the code given below: (a) 2 - 3 - 1 (b) 1 - 2 - 3 (c) 3 - 2 - 1 (d) 2 - 1 - 3 Correct Solution: D Nucleus:The solid, central part of the comet, often called the “dirty snowball.” It is usually only a few kilometers across and contains the ices and rock. Coma:As the nucleus nears the Sun, gas sublimes and forms a roughly spherical cloud of atmosphere around the nucleus. This is the visible head of the comet, much larger than the nucleus. Hydrogen Envelope:Surrounding the visible coma is a huge, sparse, and invisible envelope of neutral hydrogen gas. This envelope can extend millions of kilometers, much larger than the visible coma and nucleus. Incorrect Solution: D Nucleus:The solid, central part of the comet, often called the “dirty snowball.” It is usually only a few kilometers across and contains the ices and rock. Coma:As the nucleus nears the Sun, gas sublimes and forms a roughly spherical cloud of atmosphere around the nucleus. This is the visible head of the comet, much larger than the nucleus. Hydrogen Envelope:Surrounding the visible coma is a huge, sparse, and invisible envelope of neutral hydrogen gas. This envelope can extend millions of kilometers, much larger than the visible coma and nucleus.

#### 1. Question

Arrange the following parts of a comet from the center outward:

• Hydrogen Envelope

Select the correct answer using the code given below:

• (a) 2 - 3 - 1

• (b) 1 - 2 - 3

• (c) 3 - 2 - 1

• (d) 2 - 1 - 3

Solution: D

• Nucleus:The solid, central part of the comet, often called the “dirty snowball.” It is usually only a few kilometers across and contains the ices and rock.

• Coma:As the nucleus nears the Sun, gas sublimes and forms a roughly spherical cloud of atmosphere around the nucleus. This is the visible head of the comet, much larger than the nucleus.

• Hydrogen Envelope:Surrounding the visible coma is a huge, sparse, and invisible envelope of neutral hydrogen gas. This envelope can extend millions of kilometers, much larger than the visible coma and nucleus.

Solution: D

• Nucleus:The solid, central part of the comet, often called the “dirty snowball.” It is usually only a few kilometers across and contains the ices and rock.

• Coma:As the nucleus nears the Sun, gas sublimes and forms a roughly spherical cloud of atmosphere around the nucleus. This is the visible head of the comet, much larger than the nucleus.

• Question 2 of 5 2. Question Why does “Freezing Rain” pose a greater danger to power infrastructure than “Sleet”? (a) Freezing rain is associated with stronger winds than sleet. (b) Freezing rain falls as a liquid and freezes into a heavy glaze upon contact, adding massive weight to lines. (c) Sleet evaporates before hitting the lines. (d) Freezing rain is colder than sleet. Correct Solution: B Sleet (ice pellets) bounces. Freezing rain is liquid supercooled water. When it hits a wire, it freezes instantly, coating it in ice. This accumulation (“Ice Storm”) adds immense weight, snapping poles and lines. Sleet does not stick or accumulate in the same way. Incorrect Solution: B Sleet (ice pellets) bounces. Freezing rain is liquid supercooled water. When it hits a wire, it freezes instantly, coating it in ice. This accumulation (“Ice Storm”) adds immense weight, snapping poles and lines. Sleet does not stick or accumulate in the same way.

#### 2. Question

Why does “Freezing Rain” pose a greater danger to power infrastructure than “Sleet”?

• (a) Freezing rain is associated with stronger winds than sleet.

• (b) Freezing rain falls as a liquid and freezes into a heavy glaze upon contact, adding massive weight to lines.

• (c) Sleet evaporates before hitting the lines.

• (d) Freezing rain is colder than sleet.

Solution: B

Sleet (ice pellets) bounces. Freezing rain is liquid supercooled water. When it hits a wire, it freezes instantly, coating it in ice. This accumulation (“Ice Storm”) adds immense weight, snapping poles and lines. Sleet does not stick or accumulate in the same way.

Solution: B

• Question 3 of 5 3. Question “Conditional Instability” is a prerequisite for the formation of: (a) Stratospheric Ozone depletion. (b) Thunderstorms and Cumulonimbus clouds. (c) Temperature Inversions. (d) Radiation Fog. Correct Solution: B Conditional instability refers to an atmospheric state in which the environmental lapse rate lies between the dry adiabatic lapse rate and the moist adiabatic lapse rate. In such a situation, unsaturated air parcels are stable, but once they are lifted to the level of condensation and become saturated, they turn buoyant and continue to rise freely. This mechanism is fundamental to the development of deep convective systems. Thunderstorms and cumulonimbus clouds require strong vertical development, which is made possible when rising moist air parcels, after condensation, experience positive buoyancy due to latent heat release. Conditional instability thus provides the thermodynamic foundation for convective uplift, cloud tower growth, and the eventual formation of thunderstorms. Incorrect Solution: B Conditional instability refers to an atmospheric state in which the environmental lapse rate lies between the dry adiabatic lapse rate and the moist adiabatic lapse rate. In such a situation, unsaturated air parcels are stable, but once they are lifted to the level of condensation and become saturated, they turn buoyant and continue to rise freely. This mechanism is fundamental to the development of deep convective systems. Thunderstorms and cumulonimbus clouds require strong vertical development, which is made possible when rising moist air parcels, after condensation, experience positive buoyancy due to latent heat release. Conditional instability thus provides the thermodynamic foundation for convective uplift, cloud tower growth, and the eventual formation of thunderstorms.

#### 3. Question

“Conditional Instability” is a prerequisite for the formation of:

• (a) Stratospheric Ozone depletion.

• (b) Thunderstorms and Cumulonimbus clouds.

• (c) Temperature Inversions.

• (d) Radiation Fog.

Solution: B

• Conditional instability refers to an atmospheric state in which the environmental lapse rate lies between the dry adiabatic lapse rate and the moist adiabatic lapse rate. In such a situation, unsaturated air parcels are stable, but once they are lifted to the level of condensation and become saturated, they turn buoyant and continue to rise freely. This mechanism is fundamental to the development of deep convective systems.

• Thunderstorms and cumulonimbus clouds require strong vertical development, which is made possible when rising moist air parcels, after condensation, experience positive buoyancy due to latent heat release.

• Conditional instability thus provides the thermodynamic foundation for convective uplift, cloud tower growth, and the eventual formation of thunderstorms.

Solution: B

• Conditional instability thus provides the thermodynamic foundation for convective uplift, cloud tower growth, and the eventual formation of thunderstorms.

• Question 4 of 5 4. Question Consider the following statements: Statement-I: The “Ozone Hole” phenomenon is an annual occurrence that is significantly more severe and long-lasting over Antarctica than over the Arctic region. Statement-II: The Southern Hemisphere features a large, concentric landmass surrounded by ocean, which favors the formation of a strong, isolated polar vortex that sustains extremely low stratospheric temperatures. 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 but 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 Statement-I is correct:Data consistently shows that the Antarctic ozone hole drops below 220 DU (and often below 100 DU) every spring. The Arctic depletion is sporadic and rarely reaches “hole” criteria. Statement-II is correct:This describes the geographical reality. Antarctica is a continent surrounded by water. This symmetry allows the Polar Vortex (a band of strong westerly winds) to be nearly circular and very stable. The stability described in Statement-II leads to “thermal isolation.” The air inside the vortex gets incredibly cold (< -78°C). These temperatures are required for Polar Stratospheric Clouds (PSCs) to form. PSCs are the surfaces where ozone-destroying chemistry happens. Because the Arctic vortex is unstable (due to asymmetric northern landmasses), it is warmer, has fewer PSCs, and thus less ozone depletion. Therefore, the geography (II) explains the severity (I). Incorrect Solution: A Statement-I is correct:Data consistently shows that the Antarctic ozone hole drops below 220 DU (and often below 100 DU) every spring. The Arctic depletion is sporadic and rarely reaches “hole” criteria. Statement-II is correct:This describes the geographical reality. Antarctica is a continent surrounded by water. This symmetry allows the Polar Vortex (a band of strong westerly winds) to be nearly circular and very stable. The stability described in Statement-II leads to “thermal isolation.” The air inside the vortex gets incredibly cold (< -78°C). These temperatures are required for Polar Stratospheric Clouds (PSCs) to form. PSCs are the surfaces where ozone-destroying chemistry happens. Because the Arctic vortex is unstable (due to asymmetric northern landmasses), it is warmer, has fewer PSCs, and thus less ozone depletion. Therefore, the geography (II) explains the severity (I).

#### 4. Question

Consider the following statements:

Statement-I: The “Ozone Hole” phenomenon is an annual occurrence that is significantly more severe and long-lasting over Antarctica than over the Arctic region.

Statement-II: The Southern Hemisphere features a large, concentric landmass surrounded by ocean, which favors the formation of a strong, isolated polar vortex that sustains extremely low stratospheric temperatures.

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 but 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

• Statement-I is correct:Data consistently shows that the Antarctic ozone hole drops below 220 DU (and often below 100 DU) every spring. The Arctic depletion is sporadic and rarely reaches “hole” criteria.

• Statement-II is correct:This describes the geographical reality. Antarctica is a continent surrounded by water. This symmetry allows the Polar Vortex (a band of strong westerly winds) to be nearly circular and very stable.

The stability described in Statement-II leads to “thermal isolation.” The air inside the vortex gets incredibly cold (< -78°C). These temperatures are required for Polar Stratospheric Clouds (PSCs) to form. PSCs are the surfaces where ozone-destroying chemistry happens. Because the Arctic vortex is unstable (due to asymmetric northern landmasses), it is warmer, has fewer PSCs, and thus less ozone depletion. Therefore, the geography (II) explains the severity (I).

Solution: A

• Question 5 of 5 5. Question Which of the following is the correct chronological sequence of reef evolution according to the Subsidence Theory? (a) Fringing Reef ->Barrier Reef ->Atoll (b) Fringing Reef ->Atoll ->Barrier Reef (c) Barrier Reef ->Fringing Reef ->Atoll (d) Atoll ->Barrier Reef ->Fringing Reef Correct Solution: A Charles Darwin’s evolutionary sequence is based on the progressive subsidence of a volcanic island. Fringing Reef: Corals colonize the shallow waters immediately surrounding a new volcanic island. The reef is attached to the shore. Barrier Reef: As the island slowly sinks (subsides) or sea levels rise, the coral grows vertically to stay in the photic zone. The land retreats, creating a lagoon between the reef and the shore. The reef is now a “barrier” parallel to the coast. Atoll: The volcanic island sinks completely beneath the surface. The coral reef continues to grow at the surface, forming a continuous ring enclosing a central lagoon with no landmass. Therefore, the sequence is Fringing ->Barrier ->Atoll. Incorrect Solution: A Charles Darwin’s evolutionary sequence is based on the progressive subsidence of a volcanic island. Fringing Reef: Corals colonize the shallow waters immediately surrounding a new volcanic island. The reef is attached to the shore. Barrier Reef: As the island slowly sinks (subsides) or sea levels rise, the coral grows vertically to stay in the photic zone. The land retreats, creating a lagoon between the reef and the shore. The reef is now a “barrier” parallel to the coast. Atoll: The volcanic island sinks completely beneath the surface. The coral reef continues to grow at the surface, forming a continuous ring enclosing a central lagoon with no landmass. Therefore, the sequence is Fringing ->Barrier ->Atoll.

#### 5. Question

Which of the following is the correct chronological sequence of reef evolution according to the Subsidence Theory?

• (a) Fringing Reef ->Barrier Reef ->Atoll

• (b) Fringing Reef ->Atoll ->Barrier Reef

• (c) Barrier Reef ->Fringing Reef ->Atoll

• (d) Atoll ->Barrier Reef ->Fringing Reef

Solution: A

Charles Darwin’s evolutionary sequence is based on the progressive subsidence of a volcanic island.

• Fringing Reef: Corals colonize the shallow waters immediately surrounding a new volcanic island. The reef is attached to the shore.

• Barrier Reef: As the island slowly sinks (subsides) or sea levels rise, the coral grows vertically to stay in the photic zone. The land retreats, creating a lagoon between the reef and the shore. The reef is now a “barrier” parallel to the coast.

• Atoll: The volcanic island sinks completely beneath the surface. The coral reef continues to grow at the surface, forming a continuous ring enclosing a central lagoon with no landmass.

Therefore, the sequence is Fringing ->Barrier ->Atoll.

Solution: A

Charles Darwin’s evolutionary sequence is based on the progressive subsidence of a volcanic island.

• Fringing Reef: Corals colonize the shallow waters immediately surrounding a new volcanic island. The reef is attached to the shore.

• Atoll: The volcanic island sinks completely beneath the surface. The coral reef continues to grow at the surface, forming a continuous ring enclosing a central lagoon with no landmass.

Therefore, the sequence is Fringing ->Barrier ->Atoll.

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