question_answer

\[CaC{{l}_{2}}\] is preferred over \[NaCl\] for clearing ice on roads particularly in very cold countries. This is because:

A) \[CaC{{l}_{2}}\] is less soluble in \[{{H}_{2}}O\] than \[NaCl\]

B) \[CaC{{l}_{2}}\] is hygroscopic but \[NaCl\] is not

C) Eutectic mixture of \[CaC{{l}_{2}}/{{H}_{2}}O\] freezes at \[-55{}^\circ C\] while that of \[NaCl/{{H}_{2}}O\] freezes at \[-18{}^\circ C\]

D) \[NaCl\] makes the road slipperty but \[CaC{{l}_{2}}\] does not