681. Butter is an example of a?
(A) Gel
(B) Solution
C. Emulsion
(D) Solid Foam
682. Assuming that NaCl is 100 percent dissociated in water, the freezing point of a solution of 1 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
683. What happens when isotonic arrangements of A (mol.wt.342) and B (mol.wt.60) are placed into correspondence through a 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 happens
C. No transaction of dissolvable from arrangement A to that of B happens
D. Change in temperature of solutions takes place
684. 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
685. Which one of the following is a colligative property?
A. Melting point
B. Osmotic pressure
C. Freezing point
D. Sublimation temperature
686. The osmotic pressure of a 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
687. Saturated solution of NACL on heating becomes:
A. Super saturated
B. Unsaturated
C. Remains saturated
D. None
688. The movement of solvent molecules through a semipermeable membrane is called:
A. Electrolysis
B. Electrophoresis
C. Osmosis
D. Cataphoresis
689. Which inorganic precipitate functions as a membrane that is semipermeable?
A. Calcium sulphate
B. Barium oxalate
C. Nickel phosphate
D. Copper ferrocyanide
690. 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
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