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1.A technique of partition chromatography in which the solvent is in a pool at the bottom of container
A. Adsorption chromatography
B. Ascending chromatography
C. Radial chromatography
D. Adsorption chromatography
2.Different components of a mixture have different Rf values due to
A. Polar solvent used
B. Combination of solvents used
C. Their different distribution coefficients in the solvent
D. Polar solvent used
3.Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is
A. Stoichio chemistry
B. Physical chemistry
C. Analytical chemistry
D. Stoichio chemistry
4.Identification of the components of a sample is
A. Quantitative analysis
B. Qualitative analysis
C. Stoichiometry
D. Quantitative analysis
5.Estimation of amounts of different components in a sample is
A. Quantitative analysis
B. Qualitative analysis
C. Stoichiometry
D. Quantitative analysis
6.The technique used to separate components of a mixture in a solid phase.
A. Crystallization
B. Filtration
C. Sublimation
D. Crystallization
7.The solid which is left over the filter paper as a result of filtration
A. Insoluble Particles
B. Residue
C. Crystals
D. Insoluble Particles
8.Size of filter paper is selected according to the amount of
A. Solution
B. Amount of insoluble solute
C. Amount of soluble solute
D. Solution
9.Gooch Crucibles are made up of
A. Plastic
B. Fibre
C. Porcelain
D. Plastic
10.The rate of filtration can be increased by applying gentle suction
A. Gooch crucible
B. Filter paper
C. Sintered crucible
D. Gooch crucible
11.Sintered crucible is made up of
A. Plastic
B. Glass
C. Porcelain
D. Plastic
12.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. Inconsistent flow of filtration
13.Separation of a solid from its hot saturated solution by cooling is called
A. Vapourization
B. Solvent extraction
C. Filtration
D. Vapourization
14.In crystallization if the solvent is inflammable then direct heating is
A. Needed
B. Avoided
C. Depends on temperature
D. Needed
15.Which of the following technique is simple and efficient to purify a substance
A. Filtration
B. Sublimation
C. Crystallization
D. Filtration
16.In solvent, extraction ether is used to separate products of organic synthesis from
A. Water
B. Iodine
C. Hydrochloric acid
D. Water
17.95% ethanol is called
A. Methylated spirit
B. Wood spirit
C. Rectified spirit
D. Methylated spirit
18.The use of CaCl2 and PCl5 in the process of crystallization is as a
A. Oxidizing agent
B. Reducing agent
C. Drying agent
D. Oxidizing agent
19.The ratio of the amount of solute in an organic and aqueous solvent is
A. Retardation factor
B. Distribution coefficient
C. Distribution in aqueous solution
D. Retardation factor
20.Without suction pump filtration is
A. Fast process
B. Slow process
C. Rapid process
D. Fast process
21.Animal charcoal adsorbs the coloured
A. Impurities
B. Crystals
C. Solvents
D. Impurities
22.Direct conversion of solids into vapours is called
A. Solvent extraction
B. Sublimation
C. Crystallization
D. Solvent extraction
23.Crystallization does not involve
A. Heating
B. Sublimation
C. Cooling
D. Heating
24.In CCI4 I2 shows
A. Red colour
B. Purple colour
C. Blue colour
D. Red colour
25.Repeated extraction using small portions of solvents is more
A. Reliable
B. Efficient
C. Rapid
D. Reliable
26.Silica gel and alumina are used as
A. Mobile phase
B. Stationary phase
C. Mixed-phase
D. Mobile phase
27.Shaking two immiscible liquids increases
A. Length of contact
B. Volume of contact
C. Area of contact
D. Length of contact
28.The solvent or mixture of solvents used for separation of compounds is called
A. Stationary phase
B. Mobile phase
C. Dynamic phase
D. Stationary phase
29.Which is not a sublime material
A. Iodine
B. Benzoic acid
C. Ammonium chloride
D. Iodine
30.A sintered glass is a porous material used for
A. Absorption
B. Adsorption
C. Filtration
D. Absorption
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