Chemistry/Chemistry MCQ Question - Experimental Techniques Sample Test,Sample questions

Question:
95% ethanol is called

1.methylated spirit

2.wood spirit

3.rectified spirit

4.absolute alcohol


Question:
A process controlled by Distributive law is

1.Crystallization

2.Sublimation

3.Solvent extraction

4.Filtration


Question:
A substance having very high vapour pressure at its melting point on heating will show

1.Melting

2.Sublimation

3.Decomposition

4.Condensation


Question:
A technique of partition chromatography in which the solvent is in a pool at the bottom of container

1.Adsorption chromatography

2.Ascending chromatography

3.Radial chromatography

4.Descending chromatography


Question:
Acid present in acid rain may be

1.H2SO4

2.HNO3

3.both a and b

4.none of the above


Question:
Across short period the melting and boiling point increase upto

1.IIIA group

2.IVA group

3.VA group

4.VIA group


Question:
Animal charcoal adsorbs the coloured

1.impurities

2.crystals

3.solvents

4.both a & b


Question:
Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is

1.Stoichio chemistry

2.Physical chemistry

3.Analytical chemistry

4.Quantum chemistry


Question:
Crystallization does not involve

1.heating

2.sublimation

3.cooling

4.vaporization


Question:
Different components of a mixture have different Rf values due to

1.Polar solvent used

2.Combination of solvents used

3.Their different distribution coefficients in the solvent

4.Distributive law


Question:
Direct conversion of solids into vapours is called

1.Solvent extraction

2.sublimation

3.crystallization

4.vaporization


Question:
Estimation of amounts of different components in a sample is

1.Quantitative analysis

2.Qualitative analysis

3.Stochiometery

4.Physical chemistry


Question:
Fluted filter paper is used to

1.Filter hot solution

2.Avoid premature crystallization

3.Increase the rate of filtration

4.Decrease the area


Question:
Gooch Crucibles are made up of

1.plastic

2.fibre

3.porcelain

4.steel


Question:
Identification of the components of a sample is

1.Quantitative analysis

2.Qualitative analysis

3.Stoichiometry

4.Physical chemistry


Question:
In CCI4 I2 shows

1.Red colour

2.Purple colour

3.Blue colour

4.Yellow colour


Question:
In crystallization if the solvent is inflammable then direct heating is

1.needed

2.avoided

3.depends on temperature

4.crystallization does not involve heating


Question:
In solvent extraction ether is used to separate products of organic synthesis from

1.water

2.iodine

3.hydrochloric acid

4.gases


Question:
Rate of filtration can be increased by applying gentle suction

1.Gooch crucible

2.Filter paper

3.Sintered crucible

4.All of the above


Question:
Ratio of the amount of solute in organic and aqueous solvent is

1.Retardation factor

2.Distribution co-efficient

3.Distribution in aqueous solution

4.All statements are wrong


Question:
Regular coiling or zigzagging of polypeptide through hydrogen bonding is its

1.Quantum structure

2.Secondary structure

3.Tertiary structure

4.Primary structure


Question:
Repeated extraction using small portions of solvents is more

1.Reliable

2.Efficient

3.Rapid

4.slow


Question:
Safe and the most reliable method of drying crystals is through

1.Filter paper

2.Vacuum desiccators

3.Oven

4.None of these


Question:
Selection of filter paper depends on size of particles to be

1.filtered

2.dried

3.decolorized

4.decanted


Question:
Separation of a solid from its hot saturated solution by cooling is called

1.vapourization

2.solvent extraction

3.filtration

4.crystallization


Question:
Shaking two immiscible liquids increases

1.Length of contact

2.Volume of contact

3.Area of contact

4.all of above


Question:
Silica gel and alumina are used as

1.Mobile phase

2.Stationary phase

3.Mixed phase

4.Single phase


Question:
Sintered crucible is made up of

1.Plastic

2.glass

3.porcetain

4.fiber


Question:
Sintered glass is a porous material used for

1.absorption

2.adsorption

3.filtration

4.sublimation


Question:
Size of filter paper is selected according to the amount of

1.solution

2.amount of insoluble solute

3.amount of soluble solute

4.Amount of solvent


Question:
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is

1.Ethylene iodide

2.Ethylene bromide

3.Ethylene chloride

4.Ethylene fluoride


Question:
The major steps involved in complete quantitative analysis are

1.2

2.3

3.4

4.5


Question:
The solid which is left over the filter paper as a result of filtration

1.Insoluble particles

2.residue

3.crystals

4.mud


Question:
The solution remaining after the formation of crystals is called

1.Mother liquor

2.Dilute solution

3.Residue

4.both a & b


Question:
The solvent or mixture of solvents used for separation of compounds is called

1.Stationary phase

2.Mobile phase

3.Dynamic phase

4.Static phase


Question:
The technique used to separate components of mixture in solid phase.

1.Crystallization

2.Filtration

3.Sublimation

4.Solvent extraction


Question:
The tip of funnel should touch the wall of the breaker in order to avoid

1.Inconsistent flow of filtration

2.splashing

3.premature crystallization

4.all of above


Question:
The unit of the rate constant (k) is same as that of rate of reaction

1.First order reaction

2.Second order reaction

3.Zero order reaction

4.Third order reaction


Question:
The use of CaCl2 and PCl5 in the process of crystallization is as a

1.oxidizing agent

2.reducing agent

3.drying agent

4.colouring agent


Question:
Which is not a sublime material

1.Iodine

2.Benzoic acid

3.Ammonium chloride

4.Potash alum


Question:
Which is not related pair of term used in analytical techniques

1.Filtrate residue

2.Sublimate sublimation

3.Drying desiccator

4.Separating funnel mother liquor


Question:
Which of following metals can be displaced by all other metals from its solution

1.Ag

2.A?

3.Au

4.Cu


Question:
Which of the elements do not fall in stair case of the modern periodic table

1.Si

2.As

3.Te

4.None of the above


Question:
Which of the following elements conduct electricity and also melts below 100?C

1.Aluminium

2.Sodium

3.Carbon

4.Sulphur


Question:
Which of the following elements react with steam to produce H2 gas.

1.Pd

2.Ni

3.Sn

4.All of the above


Question:
Which of the following is the formula of chrome red.

1.Pb3 O4

2.2Pb CO3 - Pb (OH)2

3.Pb Cr O4 - Pb (OH)2

4.Pb2O


Question:
Which of the following technique is simple and efficient to purify a substance

1.Filtration

2.Sublimation

3.Crystallization

4.Solvent extraction


Question:
Which of the following technique is used for the separation of insoluble particles from liquids?

1.Filtration

2.Crystallization

3.Solvent extraction

4.Chromatography


Question:
Which of the following way in used for classification of chromatography?

1.Shape

2.Phase

3.Mechanism

4.All


Question:
Without suction pump filtration is

1.Fast process

2.Slow process

3.Rapid process

4.All are possible


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