Question # 1

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 is not a component of AAS.

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Hollow cathode lamp

Burner

Detector

Tungsten lamp

Which of the following techniques is used to separate a mixture of cations.

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GC

FPLC

Ion exchange chromatography

Size exchange chromatography

The number of significant figures in the number 0.216 is

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1

2

3

4

Which of the following technique is used to separate substance of high molecular weight of different charges.

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Dialysis

Electrophoresis

Solvent

None of the abvoe

Which of the following species is very poor oxidizing agent

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H+

Zn²⁺

Fe³⁺

MnO₄

Which of the following techniques involve gas as the mobile phase.

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HPLC

GLC

TLC

Paper chromatography

The technique which involves measurement of the changes in conductance of the solution by employing high frequency alternating current in known as.

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Potentiomerty

Polarography

Oscillometry

Conductomerty

Which of the following technique is used to separate substance based on their charge to mass ratio.

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HPLC

HPTLC

GC

Electrophoresis

The property measured in TGA is

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Change in weight

Rate of change in weight

Heat envolved and absorbed

Change of temperature.

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

Which of the following mixture is used as most popular flame in AAS.

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Acetylene air

Acetylene O2

Hydrogen air

Hydrogen O2

Which of the following analytical technique is based on the emission of light radiation.

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Flame photometry

Atomic absorption spectrophotometry

Raman spectroscopy

Conductometry

Which of the following devoice is used to measure potential difference between celctrodes.

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Polarimetre

Conductometer

Voltmeter

Photometer

Which of the following hydroxide is getatinous in nature.

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Fe(OH)3

Al(OH)3

Ca(OH)3

Cr (OH)3

The number 7.65 is rounded to.

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7.6

7.7

7.5

7.8

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 method is based on the solubility difference between the analyte and the unwanted components.

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Distillation

Complex formation

Electrodepostion

Precipitation

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