Question # 1

Which of the following statements is not related with flame photometric analysis.

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Vaporization of the solvent leaving back the residue

Conversion of solid slat to the gaseous state

Dissociation of gaseous molecules into free atoms

Measurement of the intensity of absorbed tradition

In order to increase the rate of the reaction one should.

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Increase the concentration of products

Decrease the concentration of reactants

Decreases the concentration of products

Both C and D statement are correct

Which of the following analytical technique is used for separating similar substance by preferential adsorption or partition between two phases.

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Distillation

Dialysis

Chromatography

Solvent extraction

A major constituent of materials one whose amount in the materials is

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1% or more

0.1%

0.01%

0.001 %

Amino acids are are important in biochemistry which of the following statements is not correct regarding amino acids.

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These are amphoteric substances tend to undergo internal protein transfer

In aqueous solutions these substances tend to undergo internal proton transfer

These for zwitter ion in aqueous medium

These always contain two amino groups.

Which of the following is not a ligand or complexing agent.

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NH3

CH3COOH

EDTA

CN-

Which of the following is not an adsorption indicator.

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Eosin

Bromocrsol green

Fluorescein

Phenolphthalein

The chemical method of separation in which the analytes to be separated are distributed between two phases, one of which is stationary phase while the other moves in a definite direction This technique is known as.

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Electrophoreals

Chromatography

Solvent extraction

Catachreals

Which of the following radical is not a member of IV group.

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Mg²⁺

Co²⁺

Ni²⁺

Mn²⁺

Complexing reactions are useful for which of the following method of analysis

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Gravimetry

Spectrophotometry

Interfering ions masking

All of the above

The number of bonds formed by the central atom is called its.

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Valence number

Complex number

Coordination number

Avogadro's number

The exchange equilibrium in gas chromatography depends on.

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Solubility or absorbability of he sample

The polarity of he stationary phase and analyte

The degree of H bonding

All above factors

Which of the following analytical method is used for the separation of dissolved components from solutions.

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Chromatography

Dialysis

Solvent extraction

Distillation

The technique which involves the equivalence relation between the quality of electric current passed and quantity of chemical change taking place in the electrochemical cell is called.

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Voltametry

Coulometry

Polarography

Potentiometry

Which of the following term refers to nearness between several measurements of the same quantity.

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Accuracy

Precision

Standard error

Standard error of mean

Which of the following species is determined by complex metric titrations.

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K+

Na+

Ca+

Cl-

Which of the following analytical technique is not concerned with atomic spectroscopy.

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Flame photometry

Flame emission spectrometry

Atomic absorption spectrometry

I-R spectrophotometry

The concentration required to give a signal equal to three times the standard deviation of the baseline is called.

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Sensitivity

Detection limit

Signal to noise ratio

None of the above

The pH of 0.001 N HCl is

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1

2

3

4

Which of the following adsorption indicator is used for any of the halides at pH.

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Fluorescein

Eosin

Thorin

Rhodamine 6 G

Which of the following methods is the most common method for separation of liquid components from a mixture.

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Dialysis

Solvent extraction

Precipitation

Distillation

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