Paper 1 · People, Development and EnvironmentUGC NET December 2022 (13.03.2023) Shift-I (Environmental Sciences)
हिन्दी में पढ़ें →Given below are two statements. In the light of the above statements, choose the most appropriate answer from the options given below.
Statement I:Formaldehyde, widely used in wood products and fabrics, is a very strong allergen.
Statement II:Formaldehyde concentrations in indoor air can be thousands of times higher than in outdoor air.
ABoth Statement I and Statement II are correct ✓ Correct
BBoth Statement I and Statement II are incorrect
CStatement I is correct but Statement II is incorrect
DStatement I is incorrect but Statement II is correct
Correct answer: (A) Both Statement I and Statement II are correct
Explanation
Formaldehyde is heavily used in wood products and fabrics and acts as a strong allergen, as the first statement says.
The second statement notes indoor formaldehyde can far exceed outdoor levels, which is correct.
Off-gassing from furniture, plywood and textiles keeps releasing formaldehyde inside enclosed rooms.
Poor ventilation lets the gas build up indoors to many times the outdoor concentration.
Both statements describe formaldehyde accurately.
Formaldehyde is a recognised indoor pollutant and a probable human carcinogen.
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