681. The compounds in which water molecules are added are called_______________?
A. Hydrated ions
B. double salts
C. hydrates
D. complexes
682. Solution of Na2SO4 will be_________________?
A. basic
B. acidic
C. neutral
D. cannot be presicted without data
683. 1 molar solution of glucose in water contains weight of glucose________________?
A. 180g/dm3
B. 170g/dm3
C. 190g/dm3
D. 195g/dm3
684. Water of crystallization can be removed by________________?
A. drying
B. heating
C. evaporation
D. All of the above
685. Which one of the following salt does not hydrolyzed________________?
A. Na2SO4
B. AlCl3
C. CuSO4
D. NH4Cl
686. Which of the following unit of concentration is independent of temperature ?
A. Molarity
B. Molality
C. Mole fraction
D. all
687. The molal boiling point constant is the ration of the elevation of boiling point to____________________?
A. Molarity
B. Molality
C. More fraction of solvent
D. Mole fraction of solute
688. Which has the minimum freezing point ?
A. One Molal NaCI
B. One molal KCI solution
C. One molal CaCI2
D. One molal urea solution
689. Which of the following substance do not show continuous solubility curve ?
A. KCIO4
B. Na2SO4. 10H2O
C. K2Cr2O7
D. PbCl2
690. Every sample of matter with uniform properties and fixed composition is called_________________?
A. solute
B. solvent
C. solution
D. phase