Question 1: Multiple choice questions.
(i) Which one of the following industries uses bauxite as a raw material?
(a) Aluminium Smelting
(b) Cement
(c) Paper
(d) Steel
Answer: (a) Aluminium
(ii) Which one of the following industries manufactures telephones, computer, etc.
(a) Steel
(b) Electronic
(c) Aluminium Smelting
(d) Information Technology
Answer: (b)Electronic
Question 2: Answer the following briefly in not more than 30 words.
(i) What is manufacturing?
Answer: Manufacturing involves processing raw materials to produce goods in large quantities, enhancing their value. Examples include paper from wood, sugar from sugarcane, iron and steel from iron ore, and aluminum from bauxite.
(ii) What are basic industries? Give an example
Answer: Basic or key industries supply products or raw materials to manufacture other goods. For instance, iron and steel industries provide raw iron and steel to various sectors for further processing.
Question 3: Write the answers of the following questions in 120 words.
(i) How do industries pollute the environment?
Answer:
- Industries are responsible for four types of pollution: air, water, land, and noise.
- Air pollution results from undesirable gases like sulphur dioxide and carbon monoxide, as well as airborne particulate matter.
- Water pollution stems from organic and inorganic industrial wastes and effluents discharged into water bodies, with paper, refineries, and tanneries being major contributors.
- Soil pollution is closely linked to water pollution, as waste dumping renders soil unfit for agriculture and pollutants seep into groundwater, contaminating it.
- Noise pollution arises from industrial machinery and construction activities.
(ii) Discuss the steps to be taken to minimize environmental degradation by industry?
Answer:
- Adopting the latest techniques and upgrading existing equipment for improved energy efficiency.
- Establishing green belts to foster ecological balance.
- Installing smokestacks with electrostatic precipitators, fabric filters, scrubbers, and inertial separators to reduce particulate matter in the air.
- Using silencers for noise-generating equipment.
- Minimizing water usage through reuse and recycling in multiple stages.
- Implementing rainwater harvesting to fulfill water requirements.
- Treating hot water and effluents before releasing them into rivers and ponds, involving:
- Primary treatment via mechanical means like screening, grinding, flocculation, and sedimentation.
- Secondary treatment through biological processes.
- Tertiary treatment employing biological, chemical, and physical processes, including wastewater recycling.
🌟 Why Choose CBSEJanta.com for Class 10 Social Science? 🌟
- ✔ Complete NCERT Solutions: Step-by-step solutions for all subjects!
- ✔ Chapter Summaries & Notes: Simplified explanations for quick understanding.
- ✔ Extra Practice Questions: Test yourself with additional exercises and questions.
- ✔ Interactive Learning: Engaging content to make learning Social Science fun!
📲 Download the CBSEJanta App NOW for instant access to Class 10 Social Science solutions, chapter notes, and practice materials. Ace your Social Science exams with CBSEJanta.com—your all-in-one learning guide! 🌟📖