Question # 1

Which of the following techniques is used for cleanup of samples prior to introduction into chromatographic column.

Choose an answer

Paper chromatography

TLC

Solvnent extraction

Solid phase extraction

Both C and D

Cobalt salt imparts which colour to the borax bead

Choose an answer

Blue

Green

Red

Yellow

Which of the following techniques is used for the separation of macromolecules polymers.

Choose an answer

Size exclusion chromatogrphy

TLC

GLC

HPLC

Suppose a sample is analyzed for a particular constituent by two different method One can tell whether the two average values are significantly different by applying which of the following test.

Choose an answer

Student's test

F test

Chi square test

Variance

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.

Choose an answer

Lambert's law

Beer's law

Honery's law

Starke law

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

Choose an answer

K+

Ca²⁺

Al3+

Zn2+

Which of the following combination is used to make buffer.

Choose an answer

NaOH and HCl

KOH and H2SO4

CH3COOH and CH3COONa

CH3COOH and NH4OH

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

Choose an answer

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.

Complexing reactions are useful for which of the following method of analysis

Choose an answer

Gravimetry

Spectrophotometry

Interfering ions masking

All of the above

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

Choose an answer

^Hg2+

Cu²⁺

Ai³⁺

Cd³⁺

Which of the following statements is not related with flame photometric analysis.

Choose an answer

Vaporization of the solvent leaving back the residue

Conversion of solid slat to the gaseous state

Dissociation of gaseous molecules into free atoms

Measurement of the intensity of absorbed tradition

It is known that AgCl is insoluble in HNO3 but dissolves readily in NH4OH solution .Which of the following statement is not correct.

Choose an answer

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 materials is not suitable as adsorbent for chromatography.

Choose an answer

Silica gel

Activated charocal

Alumina

Calciu7m chloride

Which of the following is not strong electrolytes.

Choose an answer

HCl

H2SO4

HNO3

CH3COOH

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

Choose an answer

Dialysis

Electrophoresis

Solvent

None of the abvoe

Gravimetric method is based on which of the following property.

Choose an answer

Volume of a liquid

Volume of gas

Mass of substance

Viscosity

The common temperature detecting device in DTA are.

Choose an answer

Thermocouples

Thermopiles

Thermistore

All

Which of the following technique is used for separation of volatile components.

Choose an answer

GC

HPLC

FPLC

TLC

Which of the following range is correct for macro analysis.

Choose an answer

Minimum 100 mg

Minimum 10 mg

Minimum 1 mg

Minimum 1000 mg

Which of the following methods is the most common method for separation of liquid components from a mixture.

Choose an answer

Dialysis

Solvent extraction

Precipitation

Distillation

Which of the following is not an adsorption indicator.

Choose an answer

Eosin

Bromocrsol green

Fluorescein

Phenolphthalein

More Classes

Other Links

PPSC Chemistry Part IV Analytical Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer