MCQ
Which of the following is used in fire extinguishers
- A$C{H_4}$
- B$CHC{l_3}$
- C$C{H_2}C{l_2}$
- ✓$CC{l_4}$
✓
Answer
Correct option: D.
$CC{l_4}$
d
(d) Its vapours are non inflammable (i.e. do not catch fire).
(d) Its vapours are non inflammable (i.e. do not catch fire).
Hence used as fire extinguishers under the name pyren.
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
Given standard electrode potentials
→$F{e^{ + 2 }} + 2{e^ - }\, \to \,Fe\,;\,\,\,\,{E^o} = - 0.440\,V$
$F{e^{ + 3 }} + 3{e^ - }\, \to \,Fe\,;\,\,\,\,{E^o} = - 0.036\,V$The standard electrode potential $({E^o})$ for$F{e^{ + 3 }} + {e^ - } \to \,F{e^{ + 2 }}$ is .............. $\mathrm{V}$
The reaction, which forms nitric oxide, is
case of $\beta-$ dehydrohalogination in these halide under treatment of strong base will be in order
→For 'invert sugar', the correct statement(s) is(are)
→(Given: specific rotations of ($+$)-sucrose, ($+$)-maltose, $L$-($-$)-glucose anc. $+(+)$-fructose in aqueous solution are $+66^{\circ},+140^{\circ},-52^{\circ}$ and $+92^{\circ}$, respectively)
($A$) 'invert sugar' is prepared by acid catalyzed hydrolysis of maltose
($B$) . 'invert sugar' is an equimolar mixture of $D$-($+$)-glucose and $D$-($-$)-fructose
($C$) specific rotation of 'invert sugar' is $-20^{\circ}$
($D$) on reaction with $\mathrm{Br}_2$ water, 'invert sugar' forms saccharic acid as one of the products
Invar, an alloy of $ Fe$ and $ Ni $ is used in watches and meter scale, its characteristic property is
→The correct statement regarding perxenate ion $(XeO_6^{4-})$ is
→Which statement is false
In the case of small cuts, bleeding is stopped by applying potash alum. Here alum acts as
In $Fe_2(CO)_9$, the two iron atoms are
→Incorrect statement from the following