1111. Assuming that Nacl is 100 percent dissociated in water, the freezing point of a solution of l molal Nacl is as follows:
A. – 1.86 Degree centigrade
B. – 3.72 Degree centigrade *
C. + 1.86 Degree centigrade
D. – 3.72 Degree centigrade
1112. What happens when isotonic arrangement of A(mol.wt.342) and B (mol.wt60) are placed into correspondence through semipermeable layer ?
A. Transaction of dissolvable from arrangement A to that of B occur
B. Transaction of dissolvable from arrangement B to that of A happen
C. No transaction of dissolvable from arrangement A to that of B happens *
D. Change in temperature of solutions takes place
1113. During the winter, ethylene glycol is added to the water in automobile radiators in cold countries. As a result,:
A. Lowering in B. Pt
B. Reducing viscosity
C. Reducing Specific heat
D. Lowering in freezing pt *
1114. Which one of the following is a colloquial property?
A. Melting point
B. Osmotic pressure *
C. Freezing point
D. Sublimation temperature
1115. The osmotic pressure of solution increases if :
A. Temperature is decreased
B. Solution constant is increased
C. There is a rise in the number of solute molecules *
D. Volume is increased
1116. Saturated solution of NACL on heating becomes :
A. Super saturated
B. Unsaturated *
C. Remains saturated
D. None
1117. The movement of solvent molecules through a semipermeable membrane is called :
A. Electrolysis
B. Electrophoresis
C. Osmosis *
D. Cataphoresis
1118. Which inorganic precipitate functions as a membrane that is semipermeable?
A. Calcium sulphate
B. Barium oxalate
C. Nickel phosphate
D. Copper ferrocyanide *
1119. The ratio of the boiling point elevation to the following is known as the molal elevation constant:
A. Molarity
B. Molality *
C. Mole fraction of solute
D. Mole fraction of solvent
1120. Which is not a colligative property ?
A. Osmotic pressure
B. Lowering of vapour pressure *
C. Depression of freezing point
D. Elevation of boiling point