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Hassan
1.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
2.Identification of the components of a sample is
A. Quantitative analysis
B. Qualitative analysis
C. Stoichiometry
D. Quantitative analysis
3.Estimation of amounts of different components in a sample is
A. Quantitative analysis
B. Qualitative analysis
C. Stoichiometry
D. Quantitative analysis
4.The technique used to separate components of a mixture in a solid phase.
A. Crystallization
B. Filtration
C. Sublimation
D. Crystallization
5.The solid which is left over the filter paper as a result of filtration
A. Insoluble Particles
B. Residue
C. Crystals
D. Insoluble Particles
6.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
7.Gooch Crucibles are made up of
A. Plastic
B. Fibre
C. Porcelain
D. Plastic
8.The rate of filtration can be increased by applying gentle suction
A. Gooch crucible
B. Filter paper
C. Sintered crucible
D. Gooch crucible
9.Sintered crucible is made up of
A. Plastic
B. Glass
C. Porcelain
D. Plastic
10.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
11.Separation of a solid from its hot saturated solution by cooling is called
A. Vapourization
B. Solvent extraction
C. Filtration
D. Vapourization
12.In crystallization if the solvent is inflammable then direct heating is
A. Needed
B. Avoided
C. Depends on temperature
D. Needed
13.Which of the following technique is simple and efficient to purify a substance
A. Filtration
B. Sublimation
C. Crystallization
D. Filtration
14.In solvent, extraction ether is used to separate products of organic synthesis from
A. Water
B. Iodine
C. Hydrochloric acid
D. Water
15.95% ethanol is called
A. Methylated spirit
B. Wood spirit
C. Rectified spirit
D. Methylated spirit
16.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
17.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
18.Without suction pump filtration is
A. Fast process
B. Slow process
C. Rapid process
D. Fast process
19.Animal charcoal adsorbs the coloured
A. Impurities
B. Crystals
C. Solvents
D. Impurities
20.Direct conversion of solids into vapours is called
A. Solvent extraction
B. Sublimation
C. Crystallization
D. Solvent extraction
21.Crystallization does not involve
A. Heating
B. Sublimation
C. Cooling
D. Heating
22.In CCI4 I2 shows
A. Red colour
B. Purple colour
C. Blue colour
D. Red colour
23.Repeated extraction using small portions of solvents is more
A. Reliable
B. Efficient
C. Rapid
D. Reliable
24.Silica gel and alumina are used as
A. Mobile phase
B. Stationary phase
C. Mixed-phase
D. Mobile phase
25.Shaking two immiscible liquids increases
A. Length of contact
B. Volume of contact
C. Area of contact
D. Length of contact
26.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
27.Which is not a sublime material
A. Iodine
B. Benzoic acid
C. Ammonium chloride
D. Iodine
28.A sintered glass is a porous material used for
A. Absorption
B. Adsorption
C. Filtration
D. Absorption
29.Selection of filter paper depends on size of particles to be
A. Filtered
B. Dried
C. Decolourized
D. Filtered
30.The solution remaining after the formation of crystals is called
A. Mother liquor
B. Dilute solution
C. Residue
D. Mother liquor
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