Question # 1

Estimation of Na in sea water is an example of

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Numerical analysis

Qualitative analysis

Quantitative analysis

None of above

Direct conversion of solid into vapors is called :

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Crystallization

Sublimation

Obligation

Vaporization.

Gooch crucible is made of:

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Brass

Porcelain

Bronze

.Gold

Without proper suction,filtration is:

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Rapid process

Fague process

Slow process

Useless process

The sample being analyzed is called :

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Electrolyte.

Substance.

Analyte.

All of above.

A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:

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If the paper covers the funnel up to its circumstances

If the paper has got small sized pores in

If the stem of funnel is large so that it dips in to filtrate

If the paper fits tightly.

Solvent extraction method is a particularly useful technique of separation when the product to be separated is:

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non-volatile or thermally unstable.

volatile or thermally stable.

non-volatile or thermally stable.

volatile or thermally unstable.

The detection of functional group is called

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Numerical analysis

Qualitative analysis

Combustion analysis

Quantitative analysis

95% ethanol is called :

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Rectified ether.

Diesel.

Rectified spirit.

Petrol.

The solution left after the formation of crystals is called :

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Residue.

Filtrate.

Mother liquor.

None of these.

Proteins and amino acid can be separated by:

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Filtration

^Sublimation

Chromatography

Suction

Analytical chemistry is the science of :

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Chemical Characterization.

Physical Characterization.

Biological Characterization.

Biochemical Characterization.

Which one of the following substances is used to decolourizing agent

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Abestos

Animal charcoal

conc. H2SO4

Silica gel

Selection of filter paper depends upon sizes of particles to be :

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Tested.

Filtered.

Checked.

All of above.

The filtration process is used to separate solid from

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Liquid

Gas

Solid

All of above

A complete chemical characterization of a compound must include

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Qualitative analysis

Chemical analysis

Quantitative analysis

Both a and c

The sample being analyzed is called:

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Electrolyte

Residue

Undue

Filtrate

A complete chemical Characterization of a compound must include:

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Qualitative analysis

Chemical analysis

Quantitative analysis

None of above

Naphthalene, iodine and NH_{4 can :}

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Sublime.

Both (a) and (c).

Crystallize.

None of above.

Analytical chemistry is the science of

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Chemical characterization

Physical characterization

Biological characterization

Biochemical characterization

The tip of the funnel should touch the side of the beaker in order to avoid

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Splashing

Leakage

Mixing

Contamination

The detection of functional group is called:

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Numerical analysis

Qualitative analysis

Quantitative analysis

Combustion analysis

The solid remained on filter paper during filtration is called the

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Substance

Residue

Undue

Filtrate

Fluted filter paper is used to:

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Decrease rate of filtration

Increase rate of filtration

Maintain rate of filtration

None of above

The apex angle of the folded filter paper is slightly greater than :

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60°

30°

45°

90°

During the process of crystallization, the hot saturated solution:

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is cooled very slowly to get large size crystals

is cooled at a moderate rate to get medium sized crystals of the product

is evaporated to get the crystals of the products

is mixed with an immiscible liquid to get the pure crystals of the product.

Fluted filter paper is used to :

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Decrease rate of filtration.

Increase rate of filtration.

Maintain rate of filtration.

None of above.

The reagents like KMnO_{4 and HCL cannot be filtered through Gooch crucible if its base is covered with :}

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Butterfly paper.

Ordinay paper.

Flying paper.

Filter paper.

The liquid obtained after passing the mixture through filter paper is termed as:

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Extract

Residue

Filtrate

Sample

Selection of filter paper depends upon sizes of particles to be:

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Tested

^Filtered

Checked

All of above

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