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 is a point source of pollution
  •  Mining area
  •  Industrial estate
  •  Chimney
  •  All of these
Chimney is a main source of pollution where pollutants are released from a single point. Mining areas and industrial estate are area source of pollution

Q2.Eutrophication is often seen in
  •  Fresh water lakes
  •  Ocean
  •  Mountains
  •  Deserts
Eutrophication is nutrient enrichment of water body resulting in increased growth of algae ,other plants and animals. It is often seen in fresh water lakes. Actually it is the natural ageing of a lake by biological enrichment of its water.

Q3.  Electrostatic Precipitator (ESP) I. Is an electrical device to remove particulate matter present in the exhaust of thermal power plant II. More than 99% particulate matter can be removed by this method III. ESP has electrode wires and a stage of collecting plates Which of the statements given above are correct?
  •   I and II
  •  I and III
  •  II and III
  •  I, II and III
Electrostatic precipitator is used to remove particulate matter present in the exhaust of thermal power plant. More than 99% particulate matter can be removed by this method. It has electrode wires that are maintained at several thousand volts which produces a corona that releases electrons

Q4. Jhum cultivation I. Also called as slash and burn agriculture, is the farming practice in North Eastern states of India II. Farmers cut down the trees of forest and burn the plant remains III. The ash is used as a fertilizer and the land is then used for farming or cattle grazing IV. After cultivation, the land is left for several years, so as to allow its recovery Which of the statements given above are correct about Jhum cultivation
  •  I, II and III
  •  II, III and IV
  •  I, III and IV
  •  I, II, III and IV
Jhum cultivation or slash and burn agriculture is the farming practice in North-Eastern states of India. In this process the farmers cut the forest trees and burn the plant remains. The land is then used for farming cattle grazing and the ash is used as a fertiliser. After cultivation, the land is left barren for years

Q5.At present, the concentration of CO_2 in the atmosphere is about
  •  100ppm
  •  240ppm
  •  380ppm
  •  520ppm
 The concentration of CO_2 in atmosphere is above 380ppm after 2009.

Q6. Chipko Movement was started in Garhwal,Himalayas in
  •  1973 by Shri Sunder Lal Bahuguna
  •  1973 by a Bishnoi Woman Amrita Devi
  •  1974 by Shri Sunder Lal Bahuguna
  •  1974 by a Bishnoi Woman Amrita Devi
Chipko Movement was started in Garhwal, Himalayas in 1974 by Shri Sundar Lal Bahuguna to prevent cutting down of trees. Local woman hugged trees to prevent their cutting by the contractors

Q7.A lake with an inflow of domestic sewage rich in organic waste may result in
  •  Drying of the lake very soon due to algal
  •  An increased production of fish due to lot of nutrients
  •  Death of fish due to lack of oxygen
  •  Increased population of aquatic food web organisms
Due to addition of domestic wastes (sewage, phosphates, nitrates, etc) water body become rich in nutrients. With the addition of nutrients, there is stimulated luxuriant growth of algae in water leads to algal blooms. The algal blooms complete with other aquatic plants for light and photosynthesis. Thus, oxygen level is depleted. Moreover, these blooms also release some toxic chemicals, which kill fish and other animals.

Q8.Montreal protocal aims at
  •  Reduction of ozone depleting substances
  •  Biodiversity conservation
  •  Control of water pollution
  •  Control of CO_2 emission
In August 1989, 44 countries and EEC ratified the Montreal protocol, which provides a mechanism to review the efficiency of control measures. In a policy statement called Helsinki Declaration, the attending nations agreed to phase out the production and consumption of controlled CFCs as soon as possible but not later than the year 2007. They also agreed to phase out the halons and to control and reduce other Ozone Depleting Substances (ODSs).

Q9.Carbon monoxide causes I. giddiness II. headache III. decreased vision IV. Cardiovascular malfunction V. asphyxia Which of the statements given above are correct?
  •  I, II and III
  •  II, III, IV and V
  •  I, III, IV and V
  •  I, II, III, IV and V
The pollutants that account for most of the air pollution worldwide are called criteria air pollutants, e.g., carbon monoxide (CO), sulphur dioxide (SO_2), nitrogen oxides (NO_x), ozone (O_3 ),H_2 S, particulate matters (PM_10) and lead (i) Carbon monoxide causes giddiness, headache, decreased vision, cardiovascular malfunction and asphyxia (ii) Hydrogen sulphide causes nausea, eye and throat irritation (iii) Sulphur dioxide causes respiratory tract diseases like asthma, bronchitis, cancer, emphysema, etc. (iv) O_3 is an oxidizing pollutant

Q10. In acid rain,SO_2 accounts by
  •  70%
  •  100%
  •  50%
  •  30%
Acid rain is due to air pollution of oxides of nitrogen (NO_x) and sulphur (SO_x). Sulphar dioxide (SO_2) reacts with water moisture and forms sulphuric acid, which accounts about 70% of acid rain.

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