Question:
Fluoride pollution mainly affects [Question ID = 1558][Question Description = 218_6_PHSC_AUG22_Q118]
Fluoride pollution mainly affects [Question ID = 1558][Question Description = 218_6_PHSC_AUG22_Q118]
Show Hint
Optimal fluoride in water is 0.7 - 1.2 mg/L. Above 1.5 mg/L, dental fluorosis begins. In India, Rajasthan and Gujarat are high-fluoride zones!
Updated On: Aug 7, 2026
- Kidney [Option ID = 6229]
- Brain [Option ID = 6230]
- Heart [Option ID = 6231]
- Teeth [Option ID = 6232]
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Fluorine is a trace element that is beneficial to humans at very low concentrations (approx. 1 ppm) but becomes a toxic pollutant at higher concentrations. Fluoride enters the human body primarily through drinking water in regions with fluoride-rich rocks.
Step 2: Detailed Explanation:
Fluoride has a high affinity for calcium-rich tissues in the body. Consequently, its primary toxic effects manifest in the teeth and bones—a condition known as Fluorosis.
1. Dental Fluorosis (Teeth): Excessive fluoride intake during the period of tooth development (childhood) disrupts the enamel-forming cells (ameloblasts). This leads to mottling of teeth, characterized by white streaks, brown staining, and in severe cases, pitting and erosion of the enamel. This is the most widespread and visible effect of fluoride pollution.
2. Skeletal Fluorosis: Long-term exposure to very high levels of fluoride causes abnormal bone growth, joint pain, and stiffness, potentially leading to permanent physical disability.
While very high acute doses can damage the kidneys (Option 1) or other organs, the most common and classic symptom of chronic fluoride pollution in the environment is its impact on the teeth.
Step 3: Final Answer:
Fluoride pollution primarily targets the dental enamel, leading to the condition known as dental fluorosis.
Fluorine is a trace element that is beneficial to humans at very low concentrations (approx. 1 ppm) but becomes a toxic pollutant at higher concentrations. Fluoride enters the human body primarily through drinking water in regions with fluoride-rich rocks.
Step 2: Detailed Explanation:
Fluoride has a high affinity for calcium-rich tissues in the body. Consequently, its primary toxic effects manifest in the teeth and bones—a condition known as Fluorosis.
1. Dental Fluorosis (Teeth): Excessive fluoride intake during the period of tooth development (childhood) disrupts the enamel-forming cells (ameloblasts). This leads to mottling of teeth, characterized by white streaks, brown staining, and in severe cases, pitting and erosion of the enamel. This is the most widespread and visible effect of fluoride pollution.
2. Skeletal Fluorosis: Long-term exposure to very high levels of fluoride causes abnormal bone growth, joint pain, and stiffness, potentially leading to permanent physical disability.
While very high acute doses can damage the kidneys (Option 1) or other organs, the most common and classic symptom of chronic fluoride pollution in the environment is its impact on the teeth.
Step 3: Final Answer:
Fluoride pollution primarily targets the dental enamel, leading to the condition known as dental fluorosis.
Was this answer helpful?
0
0
Top ICAR AIEEA Physical Sciences Questions
- According to Bray's Nutrient Mobility concept, which among following element is mobile in plants but immobile in soil?
- Which of the following nutrient is related with deficiency symptoms like discoloration of leaf buds, breaking and dropping of buds?
- The pF range of soft or friable consistency of soil is-
- The amount of organic matter in a soil with 'Value 0' according to Munsell colour system is-
- The most common 1:1 type of clay mineral in soil is-
View More Questions
Top ICAR AIEEA Soil Conservation Questions
- Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Gypsum is commonly used for the reclamation of sodic soil.
Reason (R) : Reclamation process involves reduction in exchangeable sodium with calcium and its removal from soil solution through leaching.
In light of the above statements, choose the correct answer from the options given below. - Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Implementing agroforestry practices helps in soil conservation.
Reason (R) : Agroforestry combines the cultivation of trees and crops on the same land, which reduces soil erosion by providing ground cover and enhancing soil structure through the roots of trees.
In light of the above statements, choose the most appropriate answer from the options given below. - Following are four stages of gully development. Arrange these in order.
(A). Healing stage
(B). Development stage
(C). Stabilization stage
(D). Formation stage
Choose the correct answer from the options given below: - Given below are two statements, one is labeled as Assertion (A), and the other one is labelled as Reason (R).
Assertion (A): The effective rainfall erosion index of a given area is linearly proportional to the percentage of ground that is not covered by vegetation.
Reason (R): The rain erosion index includes both the kinetic energy of rain and the maximum 30-minute rain intensity.
In light of the above statements, choose the most appropriate answer from the options given below: - Water erosion follows the sequence
(A). Ravine
(B). Sheet
(C). Splash
(D). Rill
(E). Gully
Choose the correct answer from the options given below:
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions