Question # 1

It is known that AgCl is insoluble in HNO3 but dissolves readily in NH4OH solution .Which of the following statement is not correct.

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Ag ion reacts to form complex with NH4OH solution

The concentration of Ag ion decreases

Ionic product is less than the solubility product

Ionic product is greater than solubility product

Which of the following is not strong electrolytes.

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HCl

H2SO4

HNO3

CH3COOH

The number of significance figures in the number 80.7 is.

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1

2

3

4

Which of the following technique is based on deposition of the analyte at appropriate electrode by the passage of the electric current.

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Chromatography

Dialysis

Electrodeposition

Solvent extraction

Dull red flame is observed with

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Calcium salt

Barium salt

Strontium salt

Sodium salt

Which of the following is not an organic precipitating agent.

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Diemethglyoxime

Cuperon

Oxime

Acetate

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

An indicator for an acid base titration is a

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Weak acid

Weak base

Strong acid

Strong base

Both A and B

Which of the following technique is not related to instrumental analysis.

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Optical method

Colorimetry

Polarography

Gravimetric analysis

Solid phase micro extraction is a solvent less extraction technique This technique is used for preparation of samples for analysis by which of the following technique.

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HPLC

GC

TLC

Electrophoreals

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 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

Suppose a sample is analyzed for a particular constituent by two different method One can tell whether the two average values are significantly different by applying which of the following test.

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Student's test

F test

Chi square test

Variance

The instrument used for measuring fluorescence is known as.

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Fluorimeter

Potentiometer

Flame photometer

Mass spectrometer

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 %

The most widely used method of extracting metal ions is the formation of a chelate molecule with an organic chelating agent The chelating agents are.

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Strong acids

Strong bases

Weak bases

Weak acids

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 allows charge transfer through the solution but prevents mixing of the solution.

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Anode

Cathode

Electrode cell

Salt bridge

Which of the following interaction is involved in solid phase extraction technique.

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Van der Waals forces

Dipolar attraction

H bonding

All of above

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

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Mg²⁺

Co²⁺

Ni²⁺

Mn²⁺

Which of the following technique involves the bonding of hydrophobic functional group to solid particle, surface and acts as extracting phase

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Liquid phase extraction

Solid phase extraction

Electrophoresis

Gel electrophoresis

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