Question # 1

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 analytical method is based on scattering of radiation.

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Emission spectroscopy

Colorimetry

Turbidimetry

Polarimetry

Potentiometry is based on the measurement of which physical property.

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Electrical conductance

Electrical potential

Thermal conductance

Current

Which of the following quantity is correct for micro analysis.

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1 -10 mg or < 50 ml

10-20 mg or > 50 mL

50-100 mg or < 100 mL

None of above

Which of the following techniques involves ion exchange phenomenon.

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Size exclusion chromatography

Ion exchange chromatography

GLC

HPLC

Which of the following is not a component of hollow cathode lamp.

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Anode

Cathode

Filter gas

Atomic vapour

Which of the following combination is used to make buffer.

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NaOH and HCl

KOH and H2SO4

CH3COOH and CH3COONa

CH3COOH and NH4OH

The property associated in thermometric tittration is

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Change in weight

Rate of change in weight

Heat evolved or absorbed

Change in temperature

Which of the following techniques is used to reduce the need for large volumes of organic solvents.

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Solid phase extraction

Gel permeation

Electrophoresis

TLC

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

Which of the following is not a redox indicator.

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Ferroin

Diphaylamine

Phenolphthalein

Methyl blue

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 techniques does not belong to column chromatographyy

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TLC

HPLC

Electrophoresis

Ion exchange

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 salt is soluble in water.}

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BaCO3

SrCO3

CaCO3

K2CO3

Yellow colour of the flame is observed with

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Calcium salt

Barium salt

Sodium salt

Potassium salt

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 techniques is capable of seperating minute quantities of the substances in a relatively short times with high resolutions.

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Gel electrophoresis

Capillary electrophoresis

GC

HPLC

The digits which are necessary to express the result of a measurement to the precision with which the measurement is made are called.

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Non significant figures

Mathematical figures

Significant figures

Reagent errors

Which of the following technique is useful to remove metal ions from an interfering matrix.

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Solvent extraction

Electrophorests

Cataphorests

Gel permeation

Which of the following element is usually determined by flame photometry.

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Li

Na

K

All above elements

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