Methanol is toxic because it is metabolized to: MCQ with Answer and Explanation

Methanol is toxic because it is metabolized to:
A. Acetic acid
B. Acetone
C. Ethanol
D. Formaldehyde and formic acid
Answer: Option D
Solution (By JKSSB Mock Tests)
In the liver, methanol is oxidized to formaldehyde, then to formic acid, which damages the optic nerve and can cause blindness or death. Ethanol is used as an antidote by competing for the enzyme alcohol dehydrogenase.

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Practice More chemistry Questions

Question #1
The element with atomic number 17 belongs to which group and period?
A. Group 7, Period 3
B. Group 17, Period 3
C. Group 17, Period 2
D. Group 7, Period 2

Correct Answer: Option B


Explanation:
The element with atomic number 17 is Chlorine. Its electronic configuration is 2, 8, 7. It has 3 shells, so it is in Period 3. It has 7 valence electrons, so it belongs to Group 17 (10 + 7 = 17 in modern IUPAC notation) along with fluorine, bromine, and iodine.

This question belongs to: Science chemistry
Question #2
Terylene is also known as:
A. Polyacrylonitrile
B. Nylon
C. Polyester
D. Polyurethane

Correct Answer: Option C


Explanation:
Terylene is a synthetic fiber belonging to the polyester family. Chemically, it is polyethylene terephthalate (PET), formed by the condensation polymerization of ethylene glycol and terephthalic acid. It is widely used in textiles, plastic bottles, and recording tapes.

This question belongs to: Science chemistry
Question #3
The half-life of a radioactive element is 10 days. After 40 days, the fraction remaining is:
A. 1/16
B. 1/8
C. 1/2
D. 1/4

Correct Answer: Option A


Explanation:
Number of half-lives = 40/10 = 4. Remaining fraction = (1/2)⁴ = 1/16. So after 4 half-lives, 1/16 of original amount remains.

This question belongs to: Science chemistry