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 30305

all types of questions asked at the cipla interview

Cipla, Graviti Pharmaceuticals, Calyx, Aurobindo,

3344

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 7613




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

Dr Reddys,

10 25427

why potassium dicromate use in calibration of UV VIIBLE SPECTROCOPY ?

3 4578

how to pepare 6.8 pH phosphate buffer

10 64412

what is pK & pKa value

3 9812

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

6 7111




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

Cipla, Reddy Labs,

4 31222

What is difference between Primary and secodary reference standard?

2 15369

WHAT IS UNIT OF ABSORBANCE AREA IN HPLC OR UV DETECTER

8 17730

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

1 2981

what is mass spectra ? why it is necessary ?

1 3801

difference between IR & NMR spectroscopy ?

9 32339

what v define from IR & NMR spectroscopy ?

Sun Pharma,

2 5353


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Un-Answered Questions { Analytical Chemistry }

why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

6828


USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

550


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

988


Why potassium dichromate was using in Uv calibration?

442


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1657






Identify problem faced when mass spectroscopy is used with HPLC system ?

680


what is partion and column chromatography

1034


How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1100


how the compound separate in coulunm,explain

1024


2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

879


about method developement in hplc

387


Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

555


How to start the dissolution development for unknown tab?

306


i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me

1421


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

1925