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Q1. The Bairabi–Sairang Railway Line inaugrated recently connects which of the following two Indian states?
- The Bairabi–Sairang Railway Line inaugrated recently is a broad-gauge railway line connecting Bairabi in Assam to Sairang near Aizawl as part of Indian Railways’ North East connectivity mission under the “Act East” policy.
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Q2. Consider the following statements regarding solidification technology:
i) Solidification technology involves converting liquid or semi-liquid waste into a stable solid form to facilitate safer handling and disposal.
ii) Solidification always destroys hazardous chemical constituents by converting them into non-toxic compounds.
iii) Cement, fly ash and lime are commonly used as binding materials in solidification processes.
iv) Solidification technology is used in the management of certain industrial and hazardous wastes to reduce the mobility of contaminants.
Which of the statements given above are correct?
- Statement 1 is correct. Solidification technology is an engineering technique used to convert liquid, sludge-like or semi-solid waste into a stable solid mass. This makes transportation, storage and final disposal safer by improving the physical characteristics of the waste. Statement 2 is incorrect. Solidification does not necessarily destroy hazardous chemicals. Its primary objective is to: Reduce permeability Immobilize contaminants Improve structural stability Minimize leaching Statement 3 is correct. Common binding agents include: Portland cement Lime Fly ash Pozzolanic materials Certain proprietary binders Statement 4 is correct. The technology is widely used for: Heavy metal-contaminated sludge Industrial hazardous waste Mining residues Certain radioactive wastes (after appropriate conditioning)
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Q3. Consider the following statements regarding Majorana particles:
i) A Majorana particle is a hypothetical fermion that is its own antiparticle.
ii) If neutrinos are proven to be Majorana particles, it could help explain why matter dominates over antimatter in the Universe.
Which of the statements given above are correct?
- Statement 1 is correct. Italian physicist Ettore Majorana proposed particles that are identical to their own antiparticles. Unlike electrons and positrons, which are distinct particle-antiparticle pairs, a Majorana fermion would be its own antiparticle. Statement 2 is correct. One of the major questions in cosmology is why the Universe contains far more matter than antimatter. If neutrinos are Majorana particles, processes violating lepton number (such as neutrinoless double-beta decay) could support theories like leptogenesis, which may help explain this asymmetry.
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Q4. The Mana Mitra Governance Model seeks to improve the delivery of government services by providing citizens with a unified digital interface. The model emphasizes integration of multiple government departments to reduce the need for citizens to approach different offices separately. The governance model relies exclusively on physical service centres and does not provide technology-enabled citizen interaction. The initiative aims to improve transparency, responsiveness and ease of access to public services. This initiative belongs to which of the following states?
- The Mana Mitra Governance Model of Andhra Pradesh seeks to improve the delivery of government services by providing citizens with a unified digital interface. The model emphasizes integration of multiple government departments to reduce the need for citizens to approach different offices separately. The governance model relies exclusively on physical service centres and does not provide technology-enabled citizen interaction. The initiative aims to improve transparency, responsiveness and ease of access to public services.
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Q5. The “grey rhino event” highlighting how policymakers ignored years of warnings about ecological fraility is related to which of the following disasters?
- The Wayanad landslide has been called a “grey rhino event” highlighting how policymakers ignored years of warnings about ecological fraility of the region.