How many of the above statements is/are correct?
Anonymous Quiz
7%
A. Only one
78%
B. Only two
15%
C. All the three
1%
D. None of the above
Answer: B
Soln:
Fly Ash
● Fly ash is a fine gray powder consisting mostly of spherical, glassy particles that are
produced as a byproduct in coal-fired power stations. Hence, statement 1 is correct.
● Fly ash has pozzolanic properties, meaning that it forms cement in the presence of water.
Issues with Fly ash
● Fly ash is a highly toxic substance known for causing health and environmental
problems. It can contain lead, arsenic, mercury, cadmium, and uranium. Hence,
statement 2 is incorrect.
● When fly ash is deposited in water bodies they contaminate aquaculture and may leach
into landmasses, leading to toxicity of agricultural land and drinking water.
● Fly ash cannot be disposed-off in the open field because it pollutes the air, soil and
groundwater.
● Long inhalation of fly ash causes serious respiratory problems.
● Fly ash also causes siltation problems.
Uses of Fly ash
● Fly ash composition, rich in silicon dioxide (SiO2), calcium oxide (CaO), and aluminum
oxide (Al2O3), makes it valuable for various applications, transforming potential waste
into useful material. Hence, statement 3 is correct.
● Fly ash can be used as prime material in many cement-based products, such as poured
concrete, concrete block, and brick.
● One of the most common uses of fly ash is in Portland Cement Concrete pavement or PCC
pavement.
● Road construction projects using PCC can use a great deal of concrete, and substituting fly
ash provides significant economic benefits.
● Fly ash can be used in reclamation of wastelands and wastewater treatment.
● Fly ash has also been used as an embankment and mine fill.
Soln:
Fly Ash
● Fly ash is a fine gray powder consisting mostly of spherical, glassy particles that are
produced as a byproduct in coal-fired power stations. Hence, statement 1 is correct.
● Fly ash has pozzolanic properties, meaning that it forms cement in the presence of water.
Issues with Fly ash
● Fly ash is a highly toxic substance known for causing health and environmental
problems. It can contain lead, arsenic, mercury, cadmium, and uranium. Hence,
statement 2 is incorrect.
● When fly ash is deposited in water bodies they contaminate aquaculture and may leach
into landmasses, leading to toxicity of agricultural land and drinking water.
● Fly ash cannot be disposed-off in the open field because it pollutes the air, soil and
groundwater.
● Long inhalation of fly ash causes serious respiratory problems.
● Fly ash also causes siltation problems.
Uses of Fly ash
● Fly ash composition, rich in silicon dioxide (SiO2), calcium oxide (CaO), and aluminum
oxide (Al2O3), makes it valuable for various applications, transforming potential waste
into useful material. Hence, statement 3 is correct.
● Fly ash can be used as prime material in many cement-based products, such as poured
concrete, concrete block, and brick.
● One of the most common uses of fly ash is in Portland Cement Concrete pavement or PCC
pavement.
● Road construction projects using PCC can use a great deal of concrete, and substituting fly
ash provides significant economic benefits.
● Fly ash can be used in reclamation of wastelands and wastewater treatment.
● Fly ash has also been used as an embankment and mine fill.
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CSAT PYQs – Time to put your skills to the test!
No Google help (we're watching! 👀).
Got the answer? Drop it in the comments below!
Let’s see who’s got the sharpest mind in the game!
#CSATChallenge #UPSCAspirants #CSATPYQ #UPSCPreparation #CivilServicesExam #UPSC2025 #BrainTeasers #NoGoogleChallenge #UPSCMotivation #OfficersIASAcademy #CSATQuiz #UPSCJourney #CompetitiveExams #MindGames #CrackCSAT #UPSCExamPrep
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Join us for an exclusive seminar by Dr. C. Sylendra Babu, IPS (Retd.), former DGP of Tamil Nadu, as he shares expert strategies to crack the IAS/IPS/IFS exams. Gain insights into preparation techniques, exam patterns, and the life of a civil servant.
📅 Date: March 1, 2025
🕥 Time: 10:30 AM
📍 Venue: Officers IAS Academy, Chennai
🔹 Register Now: https://forms.gle/xxPmb97Hq7eVXt5a9
Parents are also welcome to attend and understand the challenges and opportunities in the UPSC journey. Don't miss this chance to receive valuable guidance from one of the best mentors in the field!
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Looking forward to seeing you there!
1. Consider the following statements about National Investigation Agency (NIA)
1. It is functioning as the Central Counter Terrorism Law Enforcement Agency in the country.
2. It was created under the NIA Act, 2008.
3. It is headquartered at Bengaluru.
1. It is functioning as the Central Counter Terrorism Law Enforcement Agency in the country.
2. It was created under the NIA Act, 2008.
3. It is headquartered at Bengaluru.
How many of the above statements is/are correct?
Anonymous Quiz
10%
A. Only one
66%
B. Only two
21%
C. All the three
2%
D. None of the above
Answer: B
Soln:
National Investigation Agency:
● The National Investigation Agency (NIA) is functioning as the Central Counter Terrorism
Law Enforcement Agency in the country. Hence, statement 1 is correct.
● It is mandated to investigate all the offences:
○ affecting the sovereignty, security and integrity of India, friendly relations
with foreign states, and
○ the offences under the statutory laws enacted to implement international
treaties, agreements, conventions and resolutions of the United Nations, its
agencies and other international organisations.
○ These include terror acts and their possible links with crimes like smuggling of
arms, drugs and fake Indian currency and infiltration from across the borders.
● The agency has the power to search, seize, arrest and prosecute those involved in such
offences.
● Headquartered in Delhi, the NIA has its branches in several parts of the country. Hence,
statement 3 is incorrect.
When did the NIA come into being?
● In the wake of the 26/11 Mumbai terror attack in November 2008, the central
government decided to establish the NIA.
● The agency came into existence on December 31, 2008 under the NIA Act, 2008. Hence,
statement 2 is correct.
● NIA was created mainly to specialize in investigations into incidents of terrorist attacks
and bomb blasts in various parts of the country. Majority of such incidents were found to
have complex inter-state and international linkages while at the same time being linked
to drug and arms smuggling among other activities.
● The NIA Act was amended in the year 2019 to enlarge the mandate of the NIA by inclusion
of offences related to human trafficking, manufacture/sale of prohibited arms, cyber-
terrorism and offences under the Explosive Substances Act, 1908 and expanded its
jurisdiction beyond India.
How wide is the NIA's jurisdiction?
● The law under which the agency operates extends to:
○ whole of India and also applies to Indian citizens outside the country;
○ persons in the service of the government wherever they are posted;
○ persons on ships and aircraft registered in India wherever they may be;
○ persons who commit a scheduled offence beyond India against the Indian
citizen or affecting the interest of India.
Soln:
National Investigation Agency:
● The National Investigation Agency (NIA) is functioning as the Central Counter Terrorism
Law Enforcement Agency in the country. Hence, statement 1 is correct.
● It is mandated to investigate all the offences:
○ affecting the sovereignty, security and integrity of India, friendly relations
with foreign states, and
○ the offences under the statutory laws enacted to implement international
treaties, agreements, conventions and resolutions of the United Nations, its
agencies and other international organisations.
○ These include terror acts and their possible links with crimes like smuggling of
arms, drugs and fake Indian currency and infiltration from across the borders.
● The agency has the power to search, seize, arrest and prosecute those involved in such
offences.
● Headquartered in Delhi, the NIA has its branches in several parts of the country. Hence,
statement 3 is incorrect.
When did the NIA come into being?
● In the wake of the 26/11 Mumbai terror attack in November 2008, the central
government decided to establish the NIA.
● The agency came into existence on December 31, 2008 under the NIA Act, 2008. Hence,
statement 2 is correct.
● NIA was created mainly to specialize in investigations into incidents of terrorist attacks
and bomb blasts in various parts of the country. Majority of such incidents were found to
have complex inter-state and international linkages while at the same time being linked
to drug and arms smuggling among other activities.
● The NIA Act was amended in the year 2019 to enlarge the mandate of the NIA by inclusion
of offences related to human trafficking, manufacture/sale of prohibited arms, cyber-
terrorism and offences under the Explosive Substances Act, 1908 and expanded its
jurisdiction beyond India.
How wide is the NIA's jurisdiction?
● The law under which the agency operates extends to:
○ whole of India and also applies to Indian citizens outside the country;
○ persons in the service of the government wherever they are posted;
○ persons on ships and aircraft registered in India wherever they may be;
○ persons who commit a scheduled offence beyond India against the Indian
citizen or affecting the interest of India.
2. Consider the following statements about the James Webb Space telescope.
1. It is the largest and most powerful telescope ever built on Earth.
2. It was built in cooperation between NASA, European and Canadian Space agencies.
3. It is positioned at the Earth-Sun L2 Lagrange point.
1. It is the largest and most powerful telescope ever built on Earth.
2. It was built in cooperation between NASA, European and Canadian Space agencies.
3. It is positioned at the Earth-Sun L2 Lagrange point.
Which of the above statements is/are correct?
Anonymous Quiz
13%
A. Only one
44%
B. Only two
41%
C. All the three
1%
D. None of the above
Which of the statements given above is/are correct?
Anonymous Quiz
32%
A. 1 only
9%
B. 2 only
43%
C. Both 1 and 2
17%
D. Neither 1 nor 2
3. Consider the following statements with respect to State Emergency
1. A state emergency can be declared by the President in case of an administrative breakdown
in a state.
2. The proclamation of President's Rule, must be approved and ratified by both the Houses of
Parliament within 2 months from the date of its issue by a special majority.
1. A state emergency can be declared by the President in case of an administrative breakdown
in a state.
2. The proclamation of President's Rule, must be approved and ratified by both the Houses of
Parliament within 2 months from the date of its issue by a special majority.
Answer: C
Soln:
James Webb Space Telescope
About JWST:
● In 2021, NASA launched its James Webb Space Telescope (JWST), the largest, most
powerful space telescope ever built. Hence, statement 1 is correct.
● The telescope, optimised for infrared wavelengths, is an international collaboration
led by NASA in partnership with the European and Canadian space agencies. Hence,
statement 3 is correct.
● The science goals for the Webb can be grouped into four themes.
○ The first is to look back around 13.5 billion years to see the first stars and
galaxies forming out of the darkness of the early universe.
○ Second, to compare the faintest, earliest galaxies to today’s grand spirals and
understand how galaxies assemble over billions of years.
○ Third, to see where stars and planetary systems are being born.
○ And fourth, to observe the atmospheres of extrasolar planets (beyond our solar
system), and perhaps find the building blocks of life elsewhere in the universe.
Orbit
● Hubble orbits the Earth at an altitude of ~570 km. Webb does not orbit the Earth, instead
it sits at the Earth-Sun L2 Lagrange point, 1.5 million km away. Hence, statement 3 is
correct.
● This means that Webb orbits the Sun along with the Earth, but will stay fixed at the
same spot in relation to the Earth and the Sun.
○ At the L2 point, Webb’s solar shield will block the light from the Sun, Earth, and
Moon, which will help it stay cool — important for an infrared telescope.
Significance
● JWST is 100x more powerful than its predecessor the Hubble telescope, NASA’s
flagship telescope that has been in service for more than three decades now.
● It has longer wavelength coverage and greatly improved sensitivity. The longer
wavelengths enable Webb to look further back in time to find the first galaxies that formed
in the early Universe.
● Hubble was designed to look mainly into the ultraviolet and visible regions of the
electromagnetic spectrum. JWST is primarily an infrared telescope, allowing it to peer
through much deeper into the universe, and see through obstructions such as gas clouds.
● Webb’s mirror is much larger than Hubble’s; it can, therefore, look farther back into
time than Hubble. Webb’s primary mirror is approximately 6.5 metres in diameter
compared to Hubble’s mirror has a diameter of 2.4 metres, which means Webb’s collecting
area is around 6.25 times that of Hubble’s.
Soln:
James Webb Space Telescope
About JWST:
● In 2021, NASA launched its James Webb Space Telescope (JWST), the largest, most
powerful space telescope ever built. Hence, statement 1 is correct.
● The telescope, optimised for infrared wavelengths, is an international collaboration
led by NASA in partnership with the European and Canadian space agencies. Hence,
statement 3 is correct.
● The science goals for the Webb can be grouped into four themes.
○ The first is to look back around 13.5 billion years to see the first stars and
galaxies forming out of the darkness of the early universe.
○ Second, to compare the faintest, earliest galaxies to today’s grand spirals and
understand how galaxies assemble over billions of years.
○ Third, to see where stars and planetary systems are being born.
○ And fourth, to observe the atmospheres of extrasolar planets (beyond our solar
system), and perhaps find the building blocks of life elsewhere in the universe.
Orbit
● Hubble orbits the Earth at an altitude of ~570 km. Webb does not orbit the Earth, instead
it sits at the Earth-Sun L2 Lagrange point, 1.5 million km away. Hence, statement 3 is
correct.
● This means that Webb orbits the Sun along with the Earth, but will stay fixed at the
same spot in relation to the Earth and the Sun.
○ At the L2 point, Webb’s solar shield will block the light from the Sun, Earth, and
Moon, which will help it stay cool — important for an infrared telescope.
Significance
● JWST is 100x more powerful than its predecessor the Hubble telescope, NASA’s
flagship telescope that has been in service for more than three decades now.
● It has longer wavelength coverage and greatly improved sensitivity. The longer
wavelengths enable Webb to look further back in time to find the first galaxies that formed
in the early Universe.
● Hubble was designed to look mainly into the ultraviolet and visible regions of the
electromagnetic spectrum. JWST is primarily an infrared telescope, allowing it to peer
through much deeper into the universe, and see through obstructions such as gas clouds.
● Webb’s mirror is much larger than Hubble’s; it can, therefore, look farther back into
time than Hubble. Webb’s primary mirror is approximately 6.5 metres in diameter
compared to Hubble’s mirror has a diameter of 2.4 metres, which means Webb’s collecting
area is around 6.25 times that of Hubble’s.
Answer: D
Soln:
● The President can declare a State emergency, when the government of a state cannot be
carried on in accordance with the provisions of the Constitution. This is also known as
breakdown of Constitutional machinery. Administrative breakdown cannot be the reason
for declaration of State emergency. Hence, statement 1 is incorrect.
● The proclamation of Presidents Rule, must be approved and ratified by both the Houses of
Parliament within 2 months from the date of its issue by a simple majority. Hence,
statement 2 is incorrect.
● The President's Rule cannot extend beyond a period of 3 years in total.
Soln:
● The President can declare a State emergency, when the government of a state cannot be
carried on in accordance with the provisions of the Constitution. This is also known as
breakdown of Constitutional machinery. Administrative breakdown cannot be the reason
for declaration of State emergency. Hence, statement 1 is incorrect.
● The proclamation of Presidents Rule, must be approved and ratified by both the Houses of
Parliament within 2 months from the date of its issue by a simple majority. Hence,
statement 2 is incorrect.
● The President's Rule cannot extend beyond a period of 3 years in total.
4. The ‘Regional Anti-Terrorist Structure (RATS)’ is related to
choose the correct answer
Anonymous Quiz
68%
A) Shanghai Cooperation Organisation
19%
B) Organization for Security and Co-operation in Europe
4%
C) Heart of Asia
9%
D) NATO
Answer: A
Explanation
● The Shanghai Cooperation Organisation (SCO) was built on the ‘Shanghai Five’ grouping of
Russia, China, Kazakhstan, Kyrgyzstan and Tajikistan, which had come together in the
post-Soviet era in 1996, in order to work on regional security, reduction of border troops,
and terrorism. In 2001, the Shanghai Five inducted Uzbekistan into the group and named it
the SCO.
● India and Pakistan joined the SCO as observers in 2005, and were admitted as full
members in 2017.
● Iran has joined the Shanghai Cooperation Organisation as its ninth member.
● Iran has been an observer in the SCO since 2005, and almost after 15 years, its bid for full
and permanent membership in the organization was approved at the 2021 Summit in
Dushanbe, Tajikistan.
● Afghanistan, Belarus and Mongolia enjoy Observer status in the SCO, while six other
countries — Azerbaijan, Armenia, Cambodia, Nepal, Turkey and Sri Lanka — have
Dialogue Partner status.
● The organization has two permanent bodies — the SCO Secretariat based in Beijing and
the Executive Committee of the Regional Anti-Terrorist Structure in Tashkent.
● The Heads of State Council is the supreme decision-making body in the SCO. It meets once
a year and adopts decisions and guidelines on all important matters of the organization.
What are the main goals of the SCO?
● The SCO describes its main goals as:
○ strengthening mutual trust and neighborliness among the member states;
○ promoting their effective cooperation in politics, trade, economy, research and
technology and culture as well as in education, energy, transport, tourism,
environmental protection, and other areas;
○ making joint efforts to maintain and ensure peace, security and stability in the
region; and
○ moving towards the establishment of a democratic, fair and rational new
international political and economic order.
Explanation
● The Shanghai Cooperation Organisation (SCO) was built on the ‘Shanghai Five’ grouping of
Russia, China, Kazakhstan, Kyrgyzstan and Tajikistan, which had come together in the
post-Soviet era in 1996, in order to work on regional security, reduction of border troops,
and terrorism. In 2001, the Shanghai Five inducted Uzbekistan into the group and named it
the SCO.
● India and Pakistan joined the SCO as observers in 2005, and were admitted as full
members in 2017.
● Iran has joined the Shanghai Cooperation Organisation as its ninth member.
● Iran has been an observer in the SCO since 2005, and almost after 15 years, its bid for full
and permanent membership in the organization was approved at the 2021 Summit in
Dushanbe, Tajikistan.
● Afghanistan, Belarus and Mongolia enjoy Observer status in the SCO, while six other
countries — Azerbaijan, Armenia, Cambodia, Nepal, Turkey and Sri Lanka — have
Dialogue Partner status.
● The organization has two permanent bodies — the SCO Secretariat based in Beijing and
the Executive Committee of the Regional Anti-Terrorist Structure in Tashkent.
● The Heads of State Council is the supreme decision-making body in the SCO. It meets once
a year and adopts decisions and guidelines on all important matters of the organization.
What are the main goals of the SCO?
● The SCO describes its main goals as:
○ strengthening mutual trust and neighborliness among the member states;
○ promoting their effective cooperation in politics, trade, economy, research and
technology and culture as well as in education, energy, transport, tourism,
environmental protection, and other areas;
○ making joint efforts to maintain and ensure peace, security and stability in the
region; and
○ moving towards the establishment of a democratic, fair and rational new
international political and economic order.
5. Rafah is a city that straddles the border between which two regions?
choose the best answer
Anonymous Quiz
64%
A) Gaza Strip and Egypt
18%
B) West Bank and Jordan
9%
C) Lebanon and Syria
9%
D) Israel and Lebanon
Answer: A
Explanation
● Rafah is a city that is uniquely positioned along the border between the Gaza Strip and
Egypt. This strategic location makes it a significant point of transit for people and goods
moving between these two regions.
● The Rafah border crossing is the only entry and exit point for Palestinians in the Gaza Strip
that is not controlled by Israel, making it crucial for travel and trade.
Explanation
● Rafah is a city that is uniquely positioned along the border between the Gaza Strip and
Egypt. This strategic location makes it a significant point of transit for people and goods
moving between these two regions.
● The Rafah border crossing is the only entry and exit point for Palestinians in the Gaza Strip
that is not controlled by Israel, making it crucial for travel and trade.
1. With reference to the SATAT initiative, consider the following statements.
1. It aims at boosting production and availability of Compressed BioGas (CBG) as an alternative and affordable clean fuel for the transportation sector.
2. It was launched by the Ministry of New and Renewable Energy.
1. It aims at boosting production and availability of Compressed BioGas (CBG) as an alternative and affordable clean fuel for the transportation sector.
2. It was launched by the Ministry of New and Renewable Energy.