Question # 1

Which of the following technique in current voltage technique

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Amperometry

Voltammetry

Poteatiomertry

Polarography

Yellow colour of the flame is observed with

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Calcium salt

Barium salt

Sodium salt

Potassium salt

Potentiometry is based on the measurement of which physical property.

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Electrical conductance

Electrical potential

Thermal conductance

Current

When HCl is titrated against NaOH , the pH at the equivalence point is.

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zero

> 7

< 7

14

When to a solution of weak electrolyte a strong electrolyte with a common ion is added, the dissociation of weak electrolytes is suppressed . This is known as.

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Stark effect

Salt effect

Common ion effect

Zeman effect

Which property is used in volumetric methods of analysis.

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Density

Viscosity

Volume

Molar volume

The concentration required to give a signal equal to three times the standard deviation of the baseline is called.

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Sensitivity

Detection limit

Signal to noise ratio

None of the above

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

In second group of inorganic qualitative analysis, the S^2-ions does not form precipitate with which of the following ions.

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^Hg2+

Cu²⁺

Ai³⁺

Cd³⁺

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

Volta metric technique using a dropping mercury electrode is called.

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Amperometry

Coulometry

Polarography

Potentiometry

In TGA, the width loss curve depends on the which instrumental factors.

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Furance heating rate

Recording or chart speed

Furnace atmosphere

All

The light source in AAS used is

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UV light

Visible light

Radio waved

Hollow cathode lamp

The separation efficiency of a column can be expressed in terms of number of.

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Solvents used

Theoretical plates

Stationary phases

Mobile phases

Which of the following materials is not suitable as adsorbent for chromatography.

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Silica gel

Activated charocal

Alumina

Calciu7m chloride

Which of the following analytical technique is based on the refraction of radiation.

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Conductometry

Refractometry

Coulometry

Potentiaometry

Which of the following physical property forms the basis of radio chemicals methods of analysis.

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Absorption of light

Emission of light

Radioactivity

Thermal conductivity

When CH3COOH is titrated against NaOH the pH as the equivalence point is.

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7

> 7

o

>7

6.8

Which of the following steps is involved in quantitative analysis.

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Sampling

Conversion of the desired constituent into a suitable form per analysis.

Measurement of some physical or chemicals property, on which the determination is based.

All above steps

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 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

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