Question:
Chloroform is oxidised in the presence of sunlight to form
Chloroform is oxidised in the presence of sunlight to form
Show Hint
Chloroform + air + light gives a toxic gas; think phosgene.
Updated On: Jul 10, 2026
- \( CCl_4 \)
- \( COCl_2 \)
- \( CH_2Cl_2 \)
- \( CHCl_3 \)
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Chloroform \( (CHCl_3) \) slowly reacts with atmospheric oxygen in the presence of sunlight (air and light oxidation).
Step 2: The product is the poisonous gas carbonyl chloride, also called phosgene, \( COCl_2 \).
Step 3: The reaction is \[ 2CHCl_3 + O_2 \xrightarrow{\text{sunlight}} 2COCl_2 + 2HCl \]
Step 4: This is why chloroform is stored in dark, well-filled bottles with a little ethanol added, which destroys any phosgene formed. Hence the answer is \( COCl_2 \).
Step 2: The product is the poisonous gas carbonyl chloride, also called phosgene, \( COCl_2 \).
Step 3: The reaction is \[ 2CHCl_3 + O_2 \xrightarrow{\text{sunlight}} 2COCl_2 + 2HCl \]
Step 4: This is why chloroform is stored in dark, well-filled bottles with a little ethanol added, which destroys any phosgene formed. Hence the answer is \( COCl_2 \).
Was this answer helpful?
0
0
Top UP Board XII Chemistry Questions
- Four alternatives are given in each part of this question. Write the correct alternative in your answer-book. Fe is:
- The configuration showing maximum oxidation state is:
- After eliminating salt bridge of any Galvanic cell, voltage of the cell:
- Electrode potential of standard hydrogen electrode is:
- The true statement for the formula \( K = Ae^{-E_a / RT} \) is:
View More Questions
Top UP Board XII Haloalkanes and Haloarenes Questions
- Write IUPAC names of the following: (i) CH\(_3\)CH = CH-CH\(_3\) Br
(ii) (CH\(_3\))\(_3\)-C-CH\(_2\)(Br)
(iii) CH\(_3\)CH\(_2\)-C-CH(Cl)CH\(_2\)CH\(_3\)
(iv) (CH\(_3\))\(_2\)CBrCH\(_2\)CH\(_3\)
(v) (CH\(_3\))\(_3\)Cl
Explain with reasons:
(i) Sulphuric acid is not used in the reaction of alcohol and KI.
(ii) Haloalkanes form alkyl cyanide as chief product on reaction with KCN, while isocyanide as chief product on reaction with AgCN.
(iii) Although chlorine is an electron withdrawing group, even then it is ortho- and para-directing in aromatic electrophilic substitution reactions.- Write structures of the following compounds: (i) 2-chloro-3-methylpentane
(ii) 1,4-dibromobut-2-ene
(iii) 1-chloro-2-methylbenzene
(iv) 1-chloro-4-ethylcyclohexane
(v) 3-bromo-2-methylbut-2-ene
- What happens when (Give chemical equations only): (i) n-butyl chloride reacts with alcoholic KOH?
(ii) Methyl iodide reacts with magnesium in presence of dry ether?
(iii) Methyl bromide reacts with sodium in presence of dry ether?
(iv) Methyl iodide reacts with KCN solution?
(v) Chlorobenzene reacts with aqueous NaOH?
- Write chemical equations of reactions of haloalkanes with two metals.
View More Questions
Top UP Board XII Questions
- In which one of the following States of India is the density of population the highest?
- Which one of the following States of India has the largest urban population?
- Which one of the following States is not related to the production of mineral oil?
- Which one of the following sea ports is located on the eastern coast of India?
- What is meant by ‘Humanisation of Nature’?
View More Questions