Question # 1

Coulometry is based on the measurement of

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Electrical current

Electrical potential

Electrical conductance

Dielectric constant

Which of the following is the best indicator for titration of CH3COH with NaOH

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Methyl orange

Methyl red

Phenophthalein

Eosin

The number 8.47 is rounded to

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8.5

8.4

8.7

8.6

The proper number of significant figures in the number 0.0780 is.

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3

1

4

2

Which of the following detector is used in HPLC system.

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Differential refractometer detector

UV detector

Diode array detector

All above

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 acid radical give organic layer test.

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Cl-

CO3

I

S^2-

Which of the following adsorption indicator is used for any of the halides at pH.

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Fluorescein

Eosin

Thorin

Rhodamine 6 G

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 chloride is soluble in hot water.

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Hg2Cl2

AgCl

PbCl2

All above

The light source in AAS used is

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UV light

Visible light

Radio waved

Hollow cathode lamp

The property measured in DTA is

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Heat effects

Weight loss

Rate of change in weight

Change in temperature

Which of the following is not an adsorption indicator.

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Eosin

Bromocrsol green

Fluorescein

Phenolphthalein

Which of the following technique is the application of voltammetry at a fixed potential to detect changes int he currents as a function of the concentrating of the analyte

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Amperometry

Coulometry

Polarography

Potentiomertry

The absorbance is directly proportional to the path length in the flame and to the concentration of atomic vapor in flame is a statement of.

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Lambert's law

Beer's law

Honery's law

Starke law

The number 7.65 is rounded to.

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7.6

7.7

7.5

7.8

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 technique is most sanative one.

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Photomerty

AAS

Flame photometry

Flourimetry

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 is not a redox indicator.

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Ferroin

Diphaylamine

Phenolphthalein

Methyl blue

Which of the following anionic species is not separated by gravimetric analysis.

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Cl-

SO4

CH3COO-

PO4

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