Analytical Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Analytical Chemistry Interview Questions

Questions Answers Views Company eMail

a bottle of concerntrated HCL (36.5) was labelled as 37% (w/w) and density 1.19m/l.What is hcl molarity?

8 42309

all types of questions asked at the cipla interview

Aurobindo, Calyx, Cipla, Graviti Pharmaceuticals,

4685

In acid base titration, after complet consumption of HCl by NaOH, addition of next drop of NaOH will give pink colour with phenolpthalein indicator. Why this pink colour appear? Why not blue, black, green or anything elese?

3 11532

Why we are using only KBr in IR spectrometer why not KCl

Dr Reddys,

10 35738

why potassium dicromate use in calibration of UV VIIBLE SPECTROCOPY ?

3 8790

how to pepare 6.8 pH phosphate buffer

10 83066

what is pK & pKa value

3 13856

what is range of Vivible UV ? What is UV& Vivible spctroscopy use for ?

6 12800

What r the limitatoins of uv visible spectroscopy ? Why Water use in blank standard for uv visible spectroscopy ?

Cipla, Reddy Labs,

4 41504

What is difference between Primary and secodary reference standard?

2 19638

WHAT IS UNIT OF ABSORBANCE AREA IN HPLC OR UV DETECTER

8 27938

why phenolpthalin gives pink colour when we titrate aganist sodium hydroxcide & phenolpthalin gives colourless titrate aganist hydrochlric acid which is un burate

1 5496

what is mass spectra ? why it is necessary ?

1 5954

difference between IR & NMR spectroscopy ?

9 41180

what v define from IR & NMR spectroscopy ?

Sun Pharma,

2 8394

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Un-Answered Questions { Analytical Chemistry }

what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

3692

In which situation we require to analytical method validation of excipient?

790

on the basis of bcs class how to proceed the solubility?

782

Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

1691

we can use expired sample for validation and analyst qualification?

812

mode of absorption in alimentary canal?

2392

How will u perform degradation study in detectors other thann PDA in HPLC Methodology

2545

what is the origin to prepare standard operating procedure

2331

Why dissolution test is not performed in all of the products

2537

If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

856

1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.

2887

What is the purpose of octyl silane columns?

4290

WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

2608

in each media we require to use SLS? how to proceed?

787

How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

3218

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