Question # 1

Which of the following is not an acid radical

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Cl-

Br-

K+

I-

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

The theoretical plate in chromatography is represented by how many equilibrium step

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One

Two

Three

Four

Which of the following information is correct about a typical packed column in GC.

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10-100 m long and 2 to 6 cm to diameter

1-10 m long and 0.2 to 0.6 cm in diameter

0.1-1 m long and 0.02 to 0.00 cm in diameter

None of the above

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

Coulometry is based on the measurement of

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Electrical current

Electrical potential

Electrical conductance

Dielectric constant

Yellow colour of the flame is observed with

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Calcium salt

Barium salt

Sodium salt

Potassium salt

Which of the following is not a redox indicator.

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Ferroin

Diphaylamine

Phenolphthalein

Methyl blue

Which of the following analytical technique is used for the separation of an interfering substance or analyte from the mixture.

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Precipitation

Distillation

Electrode position

All above these

It has been observed that if one goes on adding KNO3 solution to a precipitate of AgCl the solubility of these precipitates goes on increasing with increasing concentration of K+ and NO3= ions which are not common to AgCl This is due to which effect.

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Divers ion effect

Uncommon ion effect

Activity effect

All above

Which of the following test to used to find out whether the observed data differ significantly from the one obtained from theoretical distribution.

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Chi square test

F -Test

Student's test

Coefficient of variance

The number 7.65 is rounded to.

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7.6

7.7

7.5

7.8

Which of the following metal ion cannot be catimated by gravimetric analysis.

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K+

Ca²⁺

Al3+

Zn2+

The technique which involves the equivalence relation between the quality of electric current passed and quantity of chemical change taking place in the electrochemical cell is called.

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Voltametry

Coulometry

Polarography

Potentiometry

Which of the following acid radical give organic layer test.

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Cl-

CO3

I

S^2-

Amino acids are are important in biochemistry which of the following statements is not correct regarding amino acids.

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These are amphoteric substances tend to undergo internal protein transfer

In aqueous solutions these substances tend to undergo internal proton transfer

These for zwitter ion in aqueous medium

These always contain two amino groups.

Which of the following technique involves the bonding of hydrophobic functional group to solid particle, surface and acts as extracting phase

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Liquid phase extraction

Solid phase extraction

Electrophoresis

Gel electrophoresis

Which of the following allows charge transfer through the solution but prevents mixing of the solution.

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Anode

Cathode

Electrode cell

Salt bridge

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

Which of the following species is not a basic radical.

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Ag+

Cl-

Ba2+

K+

Which of the following analytical method is based on scattering of radiation.

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Emission spectroscopy

Colorimetry

Turbidimetry

Polarimetry

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