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1.What is the simplified form of the expression (3^2 * 5) / (3 * 5)?
  • A1
  • B3
  • C5
  • D9

Explanation

The expression simplifies as follows: (3^2 * 5) / (3 * 5) = (9 * 5) / (3 * 5). The 5 in the numerator and the denominator cancel out, leaving 9 / 3 = 3.
2.Arunachal Pradesh faces major security challenges primarily due to infiltration from which neighbouring country?
  • ABangladesh
  • BMyanmar
  • CChina
  • DPakistan

Explanation

The state shares a long, porous border with the People’s Republic of China, and incursions, infrastructure building and strategic posturing by China constitute the chief security concern.
3.Which of the following regions is an example of a continental temperate climate (Cfa/Cfb) with hot summers and cold winters?
  • AWestern Europe
  • BNorthern Canada
  • CCentral North America (e.g., Chicago)
  • DSahara Desert

Explanation

Central North America experiences a humid continental climate (Köppen Dfa/Dfb) with hot summers and cold winters, typical of continental temperate zones. Western Europe has an oceanic climate, Northern Canada is subarctic, and Sahara is arid.
4.Which of the following is a characteristic of the trade winds?
  • ABlows from the poles towards the equator
  • BBlows from the equator towards the poles
  • CBlows from the west towards the east
  • DBlows from the east towards the west

Explanation

The trade winds are a wind system that blows from the east towards the west in the tropics. They are formed due to the pressure gradient between the subtropical high and the equatorial low and play a significant role in shaping the climate of the tropics.
5.What is the HCF of 12, 18, and 24?
  • A2
  • B3
  • C6
  • D12

Explanation

To find the HCF, we list the factors of each number. For 12, the factors are 1, 2, 3, 4, 6, 12. For 18, the factors are 1, 2, 3, 6, 9, 18. For 24, the factors are 1, 2, 3, 4, 6, 8, 12, 24. The greatest common factor among these is 6.
6.Which of the following isotopes is most suitable for dating archaeological samples up to 50,000 years old?
  • AUranium‑238
  • BCarbon‑14
  • CPotassium‑40
  • DRubidium‑87

Explanation

Carbon‑14 (half‑life ≈ 5730 years) is ideal for dating organic remains up to about 50,000 years. The other isotopes have much longer half‑lives, making them unsuitable for this time range.
7.What is the term for the study of the relationship between organisms and their environment?
  • AEcology
  • BConservation biology
  • CEnvironmental science
  • DSustainability

Explanation

The term for the study of the relationship between organisms and their environment is ecology.
8.

Q7. Which of the following pollutants is mainly responsible for Acid Rain?

  • A

    CO₂

  • B

    SO₂ and NOx

  • C

    Methane

  • D

    Ozone

Explanation

Answer

✅ B

Explanation

Acid rain forms when sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) react with atmospheric water to form sulfuric and nitric acids.

Effects:

  • Soil acidification

  • Damage to forests

  • Acidification of lakes

  • Corrosion of monuments

Revise

  • Acid rain

  • Smog

  • Ozone depletion

  • PM2.5

  • AQI

9.What is the significance of Article 19(6) of the Indian Constitution?
  • AIt restricts the freedom of speech and expression
  • BIt protects the right to property
  • CIt allows for the imposition of reasonable restrictions on the right to practice any profession or to carry on any occupation, trade or business
  • DIt ensures the right to equality

Explanation

Article 19(6) of the Indian Constitution allows for the imposition of reasonable restrictions on the right to practice any profession or to carry on any occupation, trade or business, which is a fundamental right of all citizens.
10.Which of the following is NOT a characteristic of Left Wing Extremism?
  • AMaoist ideology
  • BUse of violence
  • CUrban-based movement
  • DRural-based movement

Explanation

Left Wing Extremism in India is characterized by a Maoist ideology, the use of violence, and a rural-based movement. It is not typically an urban-based movement, as Naxalite activities are usually concentrated in rural and tribal areas.

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