Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

Why we use caffeine for HPLC calibration in Detector wave ength accuracy test

Reddy Labs, Aurobindo, Cipla, Arvind, Shasun Chemicals,

59 137392

Why we use holmium oxide,perchloric acid for uv/vis calibration

Cipla, Ratiopharm, Orchid,

4 19201

Why Deuterium lamp is used as UV light Source for UV.

4 12434




What is principle of Polarimeter?

Intas,

21 62100

What is unit of KF?

ZCL,

7 31432

what is principle of XRD?

Cipla,

3 21096

What is unit of pH?

26 33764

How to calibrate glassware against std calibrated glassware?

Cadila, Hetero,

3 9244




One pH means how much volts and milivolts?

Dr Reddys,

7 21255

Why sodium lamp is used as source of Polarimeter?

NCL, Zydus Cadila, College School Exams Tests, Hetero,

12 41801

why there is a need of optical activity & specific optical activity measurement by polarimeter

Cadila,

6 8437

What is normality

Cadila,

12 15625

what is principal of karl ficher instrument!

Alkem Labs, USV,

12 26842

How many clauses in ISO!

1 8836

Why 10%,20%,30% Sucrose solution is used for the calibration of polarimeter?

Cipla, LGC Promochem,

5 18456


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Un-Answered Questions { Analytical Chemistry }

how to select short coloum and long coloumn for new molecule

923


what is peak purity and its formula

111


WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1069


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

1521


what is partion and column chromatography

964








963


What is the purpose of octyl silane columns?

2426


What is control room temperature and which guide line says?

251


give clarity of linearity and range in method validation

858


Principle of single pan analytical balance

3492


pharma industries oriented

751


how the compound separate in coulunm,explain

926


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

1370


Why Ethanol is Used for Standardization of GC Head space?

2536


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

712