Dear Readers,

NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions.

About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus.

Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. 

Q1. Which of the following methods are useful for solid waste disposal?
I. Open burning
II. Sanitary landfills
III. Rag-pickers and kabadiwallahs
IV. Natural breakdown
V. Recycling
VI. Incineration
Choose the correct option
  •  I, II, III and IV
  •  I,II,III,IV and V
  •  II, III, IV, V and VI
  •  I, II, III, IV, V and VI
Methods of Solid Waste Disposal (i) Open Burning Municipal waste is reduced by burning in open dumps but the unburnt waste serve as the breeding ground for rats and flies
(ii) Sanitary Landfills Wastes are dumped in a depression or trench after compaction and covered with dirt. Seepage of chemicals from these landfills can pollute underground water resources
(iii) Rag-pickers and Kabadiwallahs Wastes are collected and separated out into reusable or recyclable categories
(iv) Natural Breakdown The biodegradable materials are kept into deep pits in the ground for natural breakdown
(v) Recycling E-wastes can be recycled in specifically built facilities or manually to recover important metals
(vi) Incineration Majority of e-wastes generated in developed world is exported to developing world where they are incinerated

Q2. The below diagram shows a scrubber. Identify A,B,C and D

  •  A-Particulate matter, B-Clean air, C-Dirty air, D-Dust particle
  •  A-Dirty air, B-Clean air, C-Water line spray, D-Particulate matter
  •  A-Clean air, B-Dirty air, C-Particulate matter, D-Water line spray
  •  A-Dust particle, B-Clean air, C-Particulate matter, D-Collection plate grounded
A-Dirty air, B-Clean air, C-Water line spray, D-Particulate matte

Q3. As we travels along the food chain, the concentration of DDT
  •  Increases
  •  Remains constant
  •  Decreases
  •  Fluctuates randomly
As we travels along the food chain the concentration of DDT increases

Q4. What did Chernobyl, Three Mile Island, the Love Canal and Bhopal, India all have in common?
  •  They were all radioactive disasters
  •  They were environmental problems caused by global warming
  •  They were involved environmental racism
  •  They were all technological disasters caused by solid wastes
They were all radioactive disasters

Q5. Old pollutant amongst the following is
  •  SO2
  •  CO2
  •  CO
  •  Acid rain
Acid rain is a liquid pollutant, whereas SO2 CO and CO2 are gaseous pollutants.

Q6. Consider the following statements about harmful effects of radioactive pollution
I. Radiations from nuclear wastes causes mutation at a very high rate
II. At high doses, nuclear radiations are lethal
III. At low doses, radiations cause disorders and cancer
Which of the statements given above are correct?
  •  I and II
  •  I and III
  •  II and III
  •  All of these
Radiations from nuclear wastes cause mutations at a very high rate. A high doses, nuclear radiations are lethal. At low doses, radiations cause disorders and cancer. Nuclear waste should be pretreated and stored in shielded containers and then buried about 500 m deep with in rocks

Q7. Polyblend is a
  •  Mixture of two different type of plastics
  •  Mixture of two same type of plastics
  •  Fine powder of recycled modified plastic
  •  Blend of plastic and Bitumen
A fine powder of recycle modified plastic is called polyblend. Polyblend has been mixed with bitumen to lay roads in Bengaluru. Polyblend enhanced bitumen’s water repellant properties and helped to increase the life of road

Q8. Undesirable changes in soil profile, affecting its productivity is called
  •  Soil erosion
  •  soil conservation
  •  Soil pollution
  •  Soil degradation
Soil pollution is the alteration in soil caused by the removal or addition of substances and factors, which decreases its productivity, quality of plants and ground water

Q9. Study the following statements regarding Ecosave toilet and select the incorrect ones
  •  They are working in SriLanka and Kerala
  •  Composting method for recycling of human excreta
  •  Recycled materials forms natural fertilisers
  •  Enhance the need for chemical fertilisers
Enhance the need for chemical fertilisers. An ecologically compatible system of disposal of human excreta is the use of dry composting toilets, called ecosave toilets. No water is required. Human excreta is converted into a resource as it forms natural fertilizer. Ecosan toilets are already working in many parts of Kerala and Sri Lanka

Q10. Consider the following statements
I. Algal blooms are formed by free floating algae
II. Algal bloom causes fish mortality and deterioration of water quality
III. Water hyacinth, the world’s most problematic aquatic weed is also called ‘Terror of Bengal’
Which of the statements given above are correct about algal blooms?

  •  I and II
  •  I and III
  •  II and III
  •  I,II and III
The excess growth of planktonic algae that causes colouration of water is called algal blooms. They are toxic to animals and humans. In some cases, eutrophic water-bodies support excessive growth of floating plants. Water hyacinth (Eichhornia crassipes) also called ‘Terror of Bengal’ is one such plant that sometimes chokes ponds, lakes and rivers resulting in imbalance of ecosystem dynamics of water-bodies

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