Tag: biology

Questions Related to biology

Why is improper disposal of waste a curse to environment?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Wastes pollute our environment

  2. Waste has very harmful effect on the living organisms

  3. Waste decreases the fertility of the soil

  4. All of the above

Show answer
Correct Option: C
Explanation:
Improper disposal of waste pollutes our environment (air, water and soil). Improper waste storage or disposal frequently contaminates surface ground water supplies. The radioactive waste causes harmful effect on the living organism. The non-biodegradable waste decreases the microbial flora of the soil.
So, the correct answer is option D.

Which solid waste disposal mehod is cheaper and simpler?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Pulverization

  2. Compositing

  3. Sanitary Landfilling

  4. Incineration

Show answer
Correct Option: C

Which of the following are environmental friendly practices?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Carrying cloth bags for shopping

  2. Switching off light and fans when not in use

  3. Using public transport

  4. All the above

Show answer
Correct Option: D

Which of the following statements is correct?   

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. There are working 'EcoSan' toilets in many areas of Kerala and Sri-Lanka

  2. Municipal solid wastes are wastes from homes, offices, stores, schools, hospitals, etc. that are collected and disposed by the municipality

  3. In a sanitary landfill, wastes are dumped in a depression or trench after compaction and covered with dirt everyday

  4. All of these

Show answer
Correct Option: D
Explanation:
EcoSan toilet has emerged as a sustainable concept and is prevalent in Delhi, Kerala, and Mumbai for footpath and slum dwellers. These are solid wastes from home, offices, stores, schools, hospitals, hotels etc. These domestic solid wastes one usually, thrown in municipal garbage collecting cans. a depression or trench is made in the ground and wastes are dumped into it after compaction and covered with dirt every day. the above statements are correct.

So, the correct answer is 'All of these'.

Which method is used if suitable dumping areas are not available?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Incineration

  2. Compositing

  3. Pulverization

  4. Disposal into the Sea

Show answer
Correct Option: A

The process of heating the waste at high temperature is called as ________.

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Land-filling

  2. Pyrolysis

  3. Decomposing

  4. Incineration

Show answer
Correct Option: B
Explanation:

The scientific method of solid waste management where the waste is heated to high temperature. This process is beneficial for obtaining gas and electricity. The method is suitable for municipal solid waste management.

Solid matter from land washed annually into oceans is

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. 330 million tonnes

  2. 3300 million tonnes

  3. 3.3 million tonnes

  4. 33 million tones

Show answer
Correct Option: B
Explanation:

Approximately 3300 million tonnes of solid matter from land is washed annually into oceans. Apart from the soil, glasses, metals and plastics are also washed into oceans. This matter spreads over the sea floor.

Thus, the correct answer is '3300 million tonnes.'

Steel, tin and copper are being substituted in many industries by

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Plastics

  2. Ceramics

  3. High strength glass fibres

  4. All the above

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Correct Option: D

Which method of solid waste disposal is not being successful in India?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Landfillings

  2. Compositing

  3. Sea Disposal

  4. Pulverization

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Correct Option: A

Which solid waste disposal method is simple and economical?

biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

  1. Landfilling method

  2. Incineration method

  3. Compositing method

  4. Pyrolysis method

Show answer
Correct Option: A