Question # 1

A mixture containing S2- and SO4 ions on trating with dil HCl will produce

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H2S gas

SO2 gas

H2S and SO2 gas

CO

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

Which of the following technique in current voltage technique

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Amperometry

Voltammetry

Poteatiomertry

Polarography

Which of the following acid radical is not interfering.

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Phosphate

Borate

Flouride

Sulphate

Which of the following statement is not correct regarding dissociation constant (Ka)?

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It is a measure of the tendency of an acid to split up into ions

The greater the value of Ka, more is the dissociation

It is determined by conductimetric method

It is not a proper parameter for weak acids

Which of the following is a thermometric method.

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TGA

DTA

DTG

All

The rate of a chemical reaction is proportional to the product of the active mean of the reactants, This is a statement of.

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Law of dynamic equilibrium

Le Chatlier's principle

Law of mass action

Solubility product principle

The emission of light characteristics of metal and correlation of intensity of the light emitted with concentration of that metal forms the basis of.

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Roman spectroscopy

IR spectroscopy

Flame photometry

Rotational spectroscopy

Which of the following test to used to find out whether the observed data differ significantly from the one obtained from theoretical distribution.

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Chi square test

F -Test

Student's test

Coefficient of variance

Which of the following species is not a basic radical.

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Ag+

Cl-

Ba2+

K+

Which of the following factor is involved in band boarding that occur in column chromatography.

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Number of theoretical plates

Eddy diffusion

In phase mass transfer

All above

Which of the following is not a component of flame photometer.

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Pressure regulator and flow meter

The atomizer

The burner

Hallow cathode lamp

Which of the following extract is used for wet tests of acid radicals.

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Calcium carbonate extract

Sodium iodide extract

Sodium carbonate extract

Ammonium carbonate extract

Which of the following techniques is used for the separation of macromolecules polymers.

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Size exclusion chromatogrphy

TLC

GLC

HPLC

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 physical properties is employed int he analytical methods.

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Electric current

Transition temperature

Surface tension

All above

Volta metric technique using a dropping mercury electrode is called.

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Amperometry

Coulometry

Polarography

Potentiometry

Which of the following is the best indicator for titration of NH4OH with HCl.

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Methyl red

Methyl orange

Eosin

Phenolphthalein

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

A trace constituent is one whose amount in the sample is.

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< 10%

< 010%

< 1.0%

< 0.01 %

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

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Cu²⁺

Cd²⁺

Ba³⁺

K+

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