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• AIPMT 2010 Chemistry

AIPMT 2010 Chemistry

  

Q. 16. A solution of sucrose (molar mass = 342 g mol⁻¹) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained  will be: (K_f for water = 1.86 K kg mol⁻¹)

1. −0.372^oC
2. −0.520^oC
3. + 0.372^oC
4. −0.570^oC

Sol.    

Answer: (1)

Q. 17. An increase in equivalent conductance of a strong electrolyte with dilution is  mainly due to:

1. increase in ionic mobility of ions
2. 100% ionisation of electrolyte at normal dilution
3. increase in both i.e. number of ions and ionic mobility of ions
4. increase in number of ions.

Answer : (1)

Q. 18. Oxidation states of P in H₄P₂O₅, H₄P₂O₆,  H₄P₂O₇ are respectively:

1. +3, +5, +4
2. +5, +3, + 4
3. +5, +4, +3
4. +3, +4, +5      

Sol.

Answer : (4)