Question

Which of the following chemicals can be used as dry cleaning agents ?
a) $C{l}_{2}C=CC{l}_2$
b) $C{O}_2$ (liq)
c) $H_2{O}_2$
d) $C{H}_{3}CHO$

• A. $a,b,c$ and d
• B. $a,b$ and c only
• C. $b,c$ and d only
• D. $a$ and b only

Answer 1

Answer: (B)

$C{l}_{2}C=CC{l}_2,C{O}_2$ (liquid), $H_2{O}_2$, benzene, benzol, $CC{l}_4$, trichloroethylene are some of the frequently used dry cleaning fluids. However, tetrachloroethylene (perchloro ethylene) is a common solvent used in dry cleaning because it is a highly vapourising organic fluid.
But acetaldehyde is not used for dry purpose due to its decomposition property.