1141. To prepare the medium sized crystal the hot filtrate is cooled :
A. Slowly
B. Fast
C. Moderately *
D. None
1142. Which type of chromatography has fixed phase :
A. Absorption
B. Partition *
C. Gas
D. None of them
1143. When a solid which has high vapour pressure at a temperature below its boiling point, is heated, it starts:
A. Sublimation *
B. Melting
C. Decomposing
D. Condensing
1144. The process of filtration is used to separate :
A. Solute from solution
B. Insoluble particles from liquids *
C. The two immiscible liquids
D. The two miscible liquids
1145. In which process solid phase and vapour phase are directly involved ?
A. Sublimation *
B. Condensation
C. Vaporization
D. Filtration
1146. Which of the following is a type of chromatography ?
A. T.L.C
B. G.L.C
C. Paper
D. All of them *
1147. Sintered glass crucible is used for :
A. Separation of two miscible liquids
B. Purification of slid
C. Convenient filtration than that by Gooch crucible *
D. To avoid premature crystallization of solute
1148. In paper Chromatography the suspended paper is dipped in the solvent to :
A. About 5 mm *
B. Touch the surface only
C. Touch the bottom
D. About 5 cm
1149. In crystallization , the solvent is selected on the basis of :
A. Its hardness
B. Its porous nature
C. Its reactivity
D. Hit and trail method *
1150. Which of the following techniques is a type paper chromatography in which solvent is in a pool at the bottom of the vessel ?
A. Ascending paper chromatography
B. Liquid solid chromatography
C. Liquid gas chromatography *
D. Descending paper chromatography