S Block Elements Question 149
Question: $ CaCl_2 $ is preferred over $ NaCl $ for clearing ice on roads particularly in very cold countries. This is because:
Options:
A) $ CaCl_2 $ is less soluble in $ H_2O $ than $ NaCl $
B) $ CaCl_2 $ is hygroscopic but $ NaCl $ is not
C) Eutectic mixture of $ CaCl_2/H_2O $ freezes at $ -55{}^\circ C $ while that of $ NaCl/H_2O $ freezes at $ -18{}^\circ C $
D) $ NaCl $ makes the road slipperty but $ CaCl_2 $ does not
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Due to much lower freezing point of eutectic mixture of $ CaCl_2/H_2O $ .
BETA
