Question

Account for the following :







(a) CaCl2 is used to clear snow from roads in hill stations.









(b) Ethylene glycol is used as antifreeze solution in radiators of vehicles



in cold countries.



(c) The freezing point depression of 0.01 m NaCl is nearly twice that of



0.01 m glucose solution.

Answer 1

(I). CALCIUM CHLORIDE ABSORBS WATER MOLECULES VERY WELL. SO IT ABSORBS THE WATER MOLECULES PRESENT IN SNOW TO FORM CALCIUM OXIDE AND HYDROCHLORIC ACID.


(||). THE MELTING POINT OF ETYLENE GLYCOL IS -12.9 C. SO IT FREEZES DURING WINTER MONTHS. SO TO PREVENT HEAT IN RADIATORS, IT IS USED.

(|||). COMMON SALT IS AN ELECTROVALENT COMPOUND WHEREAS GLUCOSE SOLUTION IS A COVALENT COMPOUND.

IONIC BONDS HAVE STRONG INTERIONIC ATTRACTION, THUS IT HAS HIGH BOILING POINT WHEREAS COVALENT BONDS HAVE WEAK INTERIONIC ATTRACTION, THUS IT HAS LESS BOILING POINT.




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Answer 2

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