Question

5.
1 kg of 0.3 mole glucose solution in water is
cooled to -3.2°C. What weight of ice would be
separated out if a solution containing 50 g ethylene
glycol in 0.2 kg water freezes at -9.3°C?
(1) 960 g
(2) 784 g
(3) 50 g
(4) 37.2 g​

Answer 1

ΔT  

f

​  

=k  

f

​  

.m=0−(−6)=1.86m

m=  

1.86

6

​  

 i.e., =  

1.86

6

​  

 mole in 1 kg.

∴  

1.86

6

​  

×4 mole in 4 kg.

Wt =  

1.86

6

​  

×4×62=804.32 gram

Hence, the correct option is A