Minimalist IAS
Geography

Prelims · Geography · 16 questions

Oceans

Every UPSC Prelims question on this topic, 2016–2026, newest first. Tap an option to check yourself; the answer and explanation open below it.

Oceans questions per year: 2016: 0, 2017: 0, 2018: 1, 2019: 0, 2020: 1, 2021: 3, 2022: 1, 2023: 0, 2024: 1, 2025: 0, 2026: 1 Asked in 6 of 11 years · most in 2021 (3)

UPSC syllabus: “Indian and World Geography-Physical, Social, Economic Geography of India and the World.” See the full syllabus →

Why is there a great concern about the ‘microbeads’ that are released into environment?

Answer & explanation

Answer: (a) They are considered harmful to marine ecosystems.

Microbeads are tiny plastic beads put into cleansers and toothpastes as exfoliants; they slip through water filters, end up in oceans and lakes, and threaten aquatic life.

  • ✓ (a) Microbeads are a type of microplastic. They pass easily through water treatment systems into the sea, where marine animals can swallow them and toxins can collect on them, so they are a threat to marine ecosystems.
  • ✗ (b) Microbeads are rinsed off the skin and the worry about them is environmental pollution; skin cancer in children is not the reason for the concern.
  • ✗ (c) Plastic beads are not taken up into crop plants through their roots; this is not the reason for concern.
  • ✗ (d) Microbeads are used in personal care products, not as food additives or adulterants.

Remember · Microbeads are tiny plastic exfoliant beads in cosmetics and toothpaste that escape water treatment and pollute oceans, harming aquatic life.

Sources

Question and answer: UPSC's official GS Paper I (2019, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). Permalink ·

The same topic in Mains