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 28573

all types of questions asked at the cipla interview

Cipla, Graviti Pharmaceuticals, Calyx, Aurobindo,

3252

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 7298




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

Dr Reddys,

10 24562

why potassium dicromate use in calibration of UV VIIBLE SPECTROCOPY ?

3 4211

how to pepare 6.8 pH phosphate buffer

10 61595

what is pK & pKa value

3 9433

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

6 6817




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

Cipla, Reddy Labs,

4 29605

What is difference between Primary and secodary reference standard?

2 14882

WHAT IS UNIT OF ABSORBANCE AREA IN HPLC OR UV DETECTER

8 17137

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

1 2738

what is mass spectra ? why it is necessary ?

1 3637

difference between IR & NMR spectroscopy ?

9 31156

what v define from IR & NMR spectroscopy ?

Sun Pharma,

2 5071


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Un-Answered Questions { Analytical Chemistry }

how to get accurate result for Residue on evaporation in purified water

192


During Validation study, Recovery is passing at all levels but Linearity is failing. Justify?

1345


can i use hplc detector to uplc and why?

859


which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc

858


Which is the highly polar and highly non polar column in HPLC?

694






Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1189


what is partion and column chromatography

963


Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

880


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

1840


what is the origin to prepare standard operating procedure

878


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.

978


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

5245


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1011


Qc interview questions

238


what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.

939