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Social Science (087) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] straightforward initial-understanding
What is the purpose of fitting pollution-control devices such as electrostatic precipitators to factory chimneys? What type of pollutant do they help remove?
  1. A To reduce noise pollution from machinery
  2. B To reduce particulate matter in the air
  3. C To treat liquid effluents before they enter rivers
  4. D To recycle wastewater within the factory
Generated by claude-sonnet-4-6 · 2026-06-26 13:33 · grounding rag
Model Answer

Answer: B — To reduce particulate matter in the air

Electrostatic precipitators fitted to factory smoke stacks help remove particulate matter (dust, smoke, mist) from the air before it is released into the atmosphere.

Explanation

The source passage explicitly states: "Particulate matter in the air can be reduced by fitting smoke stacks to factories with electrostatic precipitators, fabric filters, scrubbers and inertial separators." Options A and D are incorrect distractors (noise and wastewater are separate issues). Option C refers to effluent treatment, not air pollution control. The key term to remember is particulate matter — solid and liquid particles suspended in air.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.