Q. Consider the following statements:

Statement I: Activated carbon is a good and an attractive tool to remove pollutants from effluent streams and to remediate contaminants from various industries.
Statement II: Activated carbon exhibits a large surface area and a strong potential for adsorbing heavy metals.
Statement III: Activated carbon can be easily synthesized from environmental wastes with high carbon content.

Which one of the following is correct in respect of the above statements?

(a) Both Statement II and Statement III are correct and both of them explain Statement I
(b) Both Statement II and Statement III are correct but only one of them explains Statement I
(c) Only one of the Statements II and III is correct and that explains Statement I
(d)(d) Neither Statement II nor Statement III is correct

10. निम्नलिखित कथनों पर विचार कीजिए:

कथन I: सक्रियित कार्बन बहिःस्रावी धाराओं में से प्रदूषकों को हटाने और विभिन्न उद्योगों से आने वाले संदूषकों के उपचारण हेतु एक अच्छा और आकर्षक साधन है।
कथन II : सक्रियित कार्बन का एक वृहत् पृष्ठ क्षेत्रफल होता है और उसमें भारी धातुओं को अधिशोषित करने की दमदार शक्यता है।
कथन III: सक्रियित कार्बन, उच्च कार्बन अंश वाले वातावरणीय अपशिष्टों में से आसानी से संश्लेषित किया जा सकता है।

उपर्युक्त कथनों के बारे में, निम्नलिखित में से कौन-सा एक सही है?

(a) कथन II और कथन III दोनों सही हैं तथा वे दोनों कथन I की व्याख्या करते हैं
(b) कथन IIऔर कथन III दोनों सही हैं किन्तु उनमें से केवल एक, कथन I की व्याख्या करता है
(c) कथन II और कथन III में से केवल एक सही है तथा वह कथन I की व्याख्या करता है
(d) न तो कथन I और न ही कथन III सही है

Correct answer : (a)

Explanation:

Statement I is correct: Activated carbon is a good and an attractive tool to remove pollutants from effluent streams and to remediate contaminants from various industries.

• Activated carbon is widely used in wastewater treatment and industrial remediation due to its excellent adsorption capabilities. It effectively removes a wide range of pollutants (including organic compounds and heavy metals) from various industrial effluents.

Statement II is correct : Activated carbon exhibits a large surface area and a strong potential for adsorbing heavy metals."

• The large surface area of activated carbon provides numerous active sites for adsorption, making it highly effective in adsorbing not just organic pollutants but also heavy metals and other inorganic substances from water and air.

Statement III is correct: Activated carbon can be easily synthesized from environmental wastes with high carbon content.

• Activated carbon can be produced from various waste materials such as coconut shells, sawdust, agricultural residues, etc., which are rich in carbon. This makes its production cost-effective and sustainable.



Relation between the Statements

• Statement I describes the application of activated carbon in pollution removal and industrial remediation.
• Statement II and Statement III provide the reasons or scientific basis for Statement I:
• Statement II explains why activated carbon is effective (large surface area and adsorption potential).
• Statement III explains the practicality and sustainability of using activated carbon (easy synthesis from waste).

Source:

https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/activated-carbon

2nd solution

Answer: (a) Both Statement II and Statement III are correct and both of them explain Statement I

Explanation:

• Statement I is correct Activated carbon is a good and an attractive tool to remove pollutants from effluent streams and to remediate contaminants from various industries.
• Statement II is correct Activated carbon exhibits a large surface area and a strong potential for adsorbing heavy metals.
• Statement III is correct Statement III is correct: Activated carbon can be easily synthesized from environmental wastes with high carbon content.
• Statement II and III explain Statement I



Source:

https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/activated-carbon#:~:text=1.2.,heavy%20metal%20ions%20from%20plants.