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 29621

all types of questions asked at the cipla interview

Cipla, Graviti Pharmaceuticals, Calyx, Aurobindo,

3313

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 7489




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

Dr Reddys,

10 25126

why potassium dicromate use in calibration of UV VIIBLE SPECTROCOPY ?

3 4431

how to pepare 6.8 pH phosphate buffer

10 63365

what is pK & pKa value

3 9692

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

6 6997




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

Cipla, Reddy Labs,

4 30654

What is difference between Primary and secodary reference standard?

2 15178

WHAT IS UNIT OF ABSORBANCE AREA IN HPLC OR UV DETECTER

8 17469

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

1 2901

what is mass spectra ? why it is necessary ?

1 3742

difference between IR & NMR spectroscopy ?

9 31790

what v define from IR & NMR spectroscopy ?

Sun Pharma,

2 5249


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Un-Answered Questions { Analytical Chemistry }

what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

657


why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?

323


why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

923


What is diffrence between extractable volume and deliverable volume? Answer pls

687


Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

214






Why a1% value is used for some product ? What is the criteria for selection a1% value ?

903


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

1006


What is stray light in uv what are units for stray light

205


What is the difference between spectro meter and spectro photo meter?

8342


Tell me about analytical method validation in QC

1709


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

769


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

539


some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

1125


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

268


what is the difference between potentiometric titration and karl fischer titration?

1009