MCQ
Why is chloroform put into dark coloured bottles
- ATo prevent evaporation
- BTo prevent from moisture
- ✓To prevent it from oxidation to form phosgene
- DTo prevent its reaction with glass
✓
Answer
Correct option: C.
To prevent it from oxidation to form phosgene
c
Chloroform is slowly oxidised by air in the presence of light to an extremely poisonous gas phosgene. Thus it is stored in closed dark coloured bottles completely filled so that air is kept out.
Chloroform is slowly oxidised by air in the presence of light to an extremely poisonous gas phosgene. Thus it is stored in closed dark coloured bottles completely filled so that air is kept out.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In a galvanic cell, the salt bridge
Product $(D)$ in above sequence is
→The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions.
→The direct reaction of xenon with fluorine leads to a series of compounds with oxidation numbers $+2,+4$ and $+6$ . XeF $4$ reacts violently with water to give $\mathrm{XeO}_3$. The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell.
$1.$ Argon is used in arc welding because of its
$(A)$ low reactivity with metal
$(B)$ ability to lower the melting point of metal
$(C)$ flammability
$(D)$ high calorific value
$2.$ The structure of $\mathrm{XeO}_3$ is
$(A)$ linear $(B)$ planar $(C)$ pyramidal $(D)$ $T$-shaped
$3.$ $\mathrm{XeF}_4$ and $\mathrm{XeF}_6$ are expected to be
$(A)$ oxidizing $(B)$ reducing $(C)$ unreactive $(D)$ strongly basic
Give the answer question $1,2$ and $3.$
The chemical name of vitamin $C$ is:
→$1.86\, g$ of aniline completely reacts to form acetanilide. $10 \,\%$ of the product is lost during purification. Amount of acetanilide obtained after purification (in $g$) is ...... $\times 10^{-2}.$
→The correct acidity order of the following is
Consider that a $d ^{6}$ metal ion $\left( M ^{2+}\right)$ forms a complex with aqua ligands, and the spin only magnetic moment of the complex is $4.90$ $BM.$ The geometry and the crystal field stabilization energy of the complex is:
→In electrolysis:
The enol form of acetone, after treatment with ${D_2}O,$ gives
→Correct statement regarding halogen is/are