Question:
Given below are two statements:
Statement (I) : Direct sunlight has germicidal action due to UV rays.
Statement (II) : Direct sunlight has germicidal action due to dehydrating effect of its thermal rays.
In light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements:
Statement (I) : Direct sunlight has germicidal action due to UV rays.
Statement (II) : Direct sunlight has germicidal action due to dehydrating effect of its thermal rays.
In light of the above statements, choose the most appropriate answer from the options given below.
Statement (I) : Direct sunlight has germicidal action due to UV rays.
Statement (II) : Direct sunlight has germicidal action due to dehydrating effect of its thermal rays.
In light of the above statements, choose the most appropriate answer from the options given below.
Show Hint
Because of the disinfecting properties of sunlight, animal housing in India is typically oriented with a "North-South" long axis. This design allows sunlight to dry and sanitize the open paddocks throughout the day.
Updated On: Jul 21, 2026
- Both Statement (I) and Statement (II) are correct.
- Both Statement (I) and Statement (II) are incorrect.
- Statement (I) is correct but Statement (II) is incorrect.
- Statement (I) is incorrect but Statement (II) is correct.
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Direct sunlight acts as a natural disinfectant, helping to control bacteria, viruses, and parasites in open pastures and animal paddocks.
Step 2: Detailed Explanation:
Statement (I) describes the effect of Ultraviolet (UV) rays.
Sunlight contains ultraviolet radiation (UV-A and UV-B).
These UV rays are absorbed by the DNA and RNA of pathogens, damaging their genetic material and preventing them from reproducing, which leads to their death.
Therefore, Statement (I) is correct.
Statement (II) refers to the thermal effect of sunlight.
Sunlight also carries thermal (infrared) energy.
Direct exposure to this heat raises surface temperatures and dries out moisture.
Since most disease-causing bacteria and parasites need moisture to survive, this rapid dehydration kills them.
Therefore, Statement (II) is correct.
Step 3: Final Answer:
Both Statement (I) and Statement (II) are correct.
Direct sunlight acts as a natural disinfectant, helping to control bacteria, viruses, and parasites in open pastures and animal paddocks.
Step 2: Detailed Explanation:
Statement (I) describes the effect of Ultraviolet (UV) rays.
Sunlight contains ultraviolet radiation (UV-A and UV-B).
These UV rays are absorbed by the DNA and RNA of pathogens, damaging their genetic material and preventing them from reproducing, which leads to their death.
Therefore, Statement (I) is correct.
Statement (II) refers to the thermal effect of sunlight.
Sunlight also carries thermal (infrared) energy.
Direct exposure to this heat raises surface temperatures and dries out moisture.
Since most disease-causing bacteria and parasites need moisture to survive, this rapid dehydration kills them.
Therefore, Statement (II) is correct.
Step 3: Final Answer:
Both Statement (I) and Statement (II) are correct.
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