KCET2015ChemistrySolutions
Which of the following aqueous solution has the highest freezing point?
Options
- A( 0.1 M ) Sucrose
- B( 0.01 MNaCl )
- C( 0.1 MN ACl )
- D( 0.01 MN a₂ SO ₄ )
Correct answer
B. ( 0.01 MNaCl )
Step-by-step solution
Depression in freezing point, ( T_ f =i K_ f m ) ( T_ f ) will depends on van't Hoff factor. ( array |l|l|l|l| Compounds & Concentration & van't Hoff factor (i) & T_boldsymbol f Sucrose & 0.1 M & 1 & 0.1 K_ f NaCl & 0.01 M & 2 & 0.02 K_ f NaCl & 0.1 M & 2 & 0.2 K_ f Na ₂ SO ₄ & 0.01 M & 3 & 0.03 K_ f array ) Therefore, depression in freezing point follow the order: (0.1 MNaCl _ i=2 >0.1 M Glucose >0.01 MN _ i=1 i=3 ~N S O ₄>0.01 MNaCl _ i=2 ) Depression in freezing point is minimum in case of ( 0.01 M NaCl ) soluti