501. Crystallization does not involve_______________?
A. heating
B. sublimation
C. cooling
D. vaporization

502. In CCI4 I2 shows________________?
A. Red colour
B. Purple colour
C. Blue colour
D. Yellow colour

503. Direct conversion of solids into vapours is called ___________________?
A. Solvent extraction
B. sublimation
C. crystallization
D. vaporization

504. Without suction pump filtration is __________________
A. Fast process
B. Slow process
C. Rapid process
D. All are possible

505. The use of CaCl2 and PCl5 in the process of crystallization is as a____________________?
A. oxidizing agent
B. reducing agent
C. drying agent
D. colouring agent

506. In solvent extraction ether is used to separate products of organic synthesis from________________?
A. water
B. iodine
C. hydrochloric acid
D. gases

507. In crystallization if the solvent is inflammable then direct heating is________________?
A. needed
B. avoided
C. depends on temperature
D. crystallization does not involve heating

508. Rate of filtration can be increased by applying gentle suction______________?
A. Gooch crucible
B. Filter paper
C. Sintered crucible
D. All of the above

509. Size of filter paper is selected according to the amount of__________________?
A. solution
B. amount of insoluble solute
C. amount of soluble solute
D. Amount of solvent

510. The tip of funnel should touch the wall of the breaker in order to avoid____________________?
A. Inconsistent flow of filtration
B. splashing
C. premature crystallization
D. all of above