Assertion (A): Methanol is highly toxic and can cause blindness if ingested. Reason (R): Methanol is metabolized in the body to formaldehyde and formic acid. MCQ with Answer and Explanation
Assertion (A): Methanol is highly toxic and can cause blindness if ingested. Reason (R): Methanol is metabolized in the body to formaldehyde and formic acid.
A. A is true but R is false.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is false but R is true.
D. Both A and R are true and R is the correct explanation of A.
Answer: Option D
Solution (By JKSSB Mock Tests)
Methanol (wood alcohol) is highly toxic. When ingested, it is metabolized by the enzyme alcohol dehydrogenase into formaldehyde and then formic acid. Formic acid interferes with mitochondrial function, leading to metabolic acidosis, optic nerve damage, and blindness. Both statements are correct and R explains A.
Explanation:
Ammonia (NH₃) is manufactured by the Haber process, which involves the direct combination of nitrogen and hydrogen gases at high pressure (200 atm) and moderate temperature (450°C) in the presence of an iron catalyst. The Contact process is for sulfuric acid, and Ostwald's is for nitric acid.
Explanation:
The amount of dissolved oxygen is crucial for aquatic life. The Biological Oxygen Demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material. High BOD indicates high organic pollution and low dissolved oxygen levels.
Explanation:
CNG (Compressed Natural Gas) is primarily methane (CHâ‚„). LPG is propane and butane. Methane is the lightest hydrocarbon. CNG is a cleaner fuel for vehicles.
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