Question # 1

Which of the following technique in current voltage technique

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Amperometry

Voltammetry

Poteatiomertry

Polarography

The relative error is usually expressed as

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Parts per ten

Parts per one

Parts per hundred

Botha C and D

In DTA , theriac effect may be exothermic of endothermic These are cause by

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Fusion

Crystal structure inversion

Destruction of crystal lattice

All of above

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

Which of the following extractant is used to solid phase extraction

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Bonding of C18 chains on silica

Bonding of C20 on paper

Bonding of C18 on glass

Bonding of C20 on cellulose

Which of the following technique has flame as a source of excitation energy.

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UV spectroscopy

I-R spectrocscopy

Flame photometry

Raman spectroscopy

Which of the following chloride is soluble in hot water.

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Hg2Cl2

AgCl

PbCl2

All above

Which of the following is not a redox indicator.

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Ferroin

Diphaylamine

Phenolphthalein

Methyl blue

Which of the following statement is not true with respect to electrode potential.

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Feasibility of a chemicals reaction

Rate of chemical reaction

Nature of a chemical reaction

Free energy of a chemical reaction

Coulometry is based on the measurement of

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Electrical current

Electrical potential

Electrical conductance

Dielectric constant

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

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NH3

CH3COOH

EDTA

CN-

Which of the following analytical techniques can be used to extract metal ion chelates.

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Solvent extractions

Evaporation

GC

Distillation

Which of the following methods is chemical in nature.

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Acid bas titration

Redox titration

Complexometric titration

All above methods

Which of the following is not a component of a gas chromatography system.

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Carrier gas

Capillary column

Packed column

Cathode lamp

Which of the following species is very poor oxidizing agent

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H+

Zn²⁺

Fe³⁺

MnO₄

Which of the following techniques is used for cleanup of samples prior to introduction into chromatographic column.

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Paper chromatography

TLC

Solvnent extraction

Solid phase extraction

Both C and D

Which of the following salt is green in colour

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Mn salt

Cr salt

Co salt

Ba salt

The equilibrium constant value for a chemical reaction is 5 x 10²⁰which of the following statement is true with respect to this value.

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Reaction will be reversible

Reaction will proceed in backward direction

Reaction is at equilibrium

Reaction will proceed in the forward direction

Which of the following group reagent is used for III group of basic radical.

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Dilute HCl

H2S + HCl

NH4OH + NH4Cl

NH4OH + H2S

The instrument used for measuring fluorescence is known as.

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Fluorimeter

Potentiometer

Flame photometer

Mass spectrometer

Gravimetric method is based on which of the following property.

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Volume of a liquid

Volume of gas

Mass of substance

Viscosity

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