Paper 1 · People, Development and Environment
UGC NET June 2023 (13.06.2023) Shift-II
Given below are two statements. Statement I: Concentration of formaldehyde in the indoor environment can be a thousand times higher than the outdoor environment. Statement II: Formaldehyde is a known carcinogen. In the light of the above statements, choose the correct answer from the options given below.
- Statement I: Concentration of formaldehyde in the indoor environment can be a thousand times higher than the outdoor environment.
- Statement II: Formaldehyde is a known carcinogen.
ABoth Statement I and Statement II are true ✓ Correct
BBoth Statement I and Statement II are false
CStatement I is true but Statement II is false
DStatement I is false but Statement II is true
Correct answer: (A) Both Statement I and Statement II are true — Both statements are true, so the answer is that both Statement I and Statement II are true.
Explanation
★Both statements are true, so the answer is that both Statement I and Statement II are true.
★Formaldehyde is a colourless gas with a sharp odour, released by many building and household products.
★Indoor sources include plywood, particle board, adhesives, paints and tobacco smoke.
★Strong indoor sources with low air exchange let indoor levels rise far above outdoor levels.
★So statement I is true that indoor concentration can be a thousand times the outdoor value.
★Statement II is true because formaldehyde is classified as a human carcinogen.
★It is linked to nasopharyngeal cancer and leukaemia, which is why indoor exposure is a health concern.
Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.
Shared by Mcqkart · via Mcqkart.in