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Published on: 21/06/2021
QB365 provides detailed and simple solution for every Creative Questions in class 12 Biology Subject. It will helps to get more idea about question pattern in every Creative questions with solution.
Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
Categorize the soild waste and their sources.
2.
Point out the effects of Noise pollution
3.
List out the effects of air pollution.
4.
What is radioactive waste how cap it be managed
5.
How can noise pollution be controlled?
1.
| Waste category | Source |
| Residential | Food wastes, plastics, paper, glass, leather, cardboard, metals, yard wastes, ashes, tires, batteries and old mattresses |
| Industrial | Packaging wastes, ashes, chemicals, cans, plastics and metal parts |
| Commercial | Thin and thick plastics, food wastes, metals, paper, glass, wood and cardboard materials |
| Institutional | Wood, paper, metals, cardboard materials and electronics |
| Construction and Demolition | Steel materials, concrete, wood, plastics, rubber, copper wires, dirt and glass. |
| Agriculture | Agricultural wastes, spoiled food and pesticide containers |
| Biomedical | Syringes, bandages, used gloves, catheter, urine bags, drugs, paper, plastics, food wastes, sanitary napkins, diapers and chemicals |
| e-waste | Electronic items like used TVs, transistors, tape recorders, computer cabinets, mother boards, CDs, cassettes, mouse, wires, cords, switches and chargers. |
2.
1. According to the USEPA (United States Environmental Protection Agency) there are direct links between noise and health. Heart disease, high blood pressure, stress related illness, sleep disruption, hearing loss (deafness), and productivity loss are the problems related to noise pollution.
2. Increased stress and tension, nervousness, irritability, anxiety, depression and panic attacks.
3. Peptic ulcer, severe head ache and memory loss.
4. Marine animals are affected by noise-pollution from offshore activities and port activities.
5. Fire crackers frighten animals. Birds are often affected by increased air traffic.
3.
1. Affects all organisms as they depend on the atmosphere for respiration.
2. Causes irritation in the throat, nose, lungs and eyes. It causes breathing problems and aggravates existing health conditions such as emphysema and asthma.
3. Contaminated air reduces the body's defense mechanism and decreases the body's capacity to fight other infections in the respiratory system.
4. Frequent exposure to polluted air increases the risk of cardiovascular diseases. Breathing air that is filled with fine particulate matter can induce hardening of the arteries, triggering cardiac arrhythmia or even a heart attack.
5. People who exercise outdoors can sometimes be susceptible to adverse effects of air pollution because it involves deeper and faster breathing. Hence it is advisable to walk or jog in the mornings in places with ample tree cover .
6. Gas leaks can be lethal or affect the quality of air in the affected area .
7. CO in the atmosphere interferes with O2 transport since haemoglobin has greater affinity for carbon monoxide. At low concentration it causes headache and blurred vision. In higher concentration, it can lead to coma and death.
4.
Radioactive waste management involves the treatment, storage and disposal of liquid, airborne and solid effluents from the nuclear industry. Three ways are employed to manage nuclear wastes
(i) Spent Fuel Pools - The spent fuel discharged from the reactors is temporarily stored in the reactor pool. The Spent fuel rods are used in stored cooling ponds. They protect the surroundings from radiation and absorb the heat generated during radioactive decay.
(ii) Vitrification method - This prevents reaction or degradation of nuclear waste for extended periods of time and encased in dry cement caskets.
(iii) Geological Repositories - A deep geological repository is a nuclear waste repository excavated deep within a stable geologic environment. It is suited to provide a high level of long-term isolation and containment without future maintenance. In India at Tarapur and Kalpakkam, a wet storage facility of Spent Fuel is the main mode of storage.
5.
(i) Planting trees in and around noise sources is an effective solution for noise pollution as plants are known to absorb noise and bring down sound levels.
(ii) Regular servicing and tuning of automobile engines can effectively reduce noise pollution by vehicles and machinery.
(iii) Workers should be provided with ear plugs and earmuffs at work sites that generate high noise levels.
(iv) Lubrication of machinery and regular servicing minimizes noise levels.
(v) Regulations should be imposed to restrict the usage of loudspeakers in crowded areas and public places.
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Tamilnadu Stateboard 12th Standard Subjects

Maths

Chemistry

Physics

Biology

Computer Science

Business Maths and Statistics

Economics

Commerce

Accountancy

History

Computer Applications

Biology

Computer Technology

Computer Applications

Computer Science

Business Maths and Statistics

Commerce

Economics

Maths

Chemistry

Physics

Computer Technology

History

Accountancy

Tamil

English

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