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Chemistry Interview Questions
Questions Answers Views Company eMail

what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

Perkin Elmer,

9256

What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

8868

What is the difference between Spectroscopy and spectrophotometry,What are the applications?

Caplin Point, Cipla,

4 11904

What is difference b/t uv detector and rid

5 11325

i set electrode to 7 buffer than i used it to check 4 buffer and 10 buffer if the results are not as expected than is it better to set the buffer again to 4 buffer or is there any other method available please let me know ...

Glochem,

2 7165

can you separate isomers by using column chromatography?

2 7988

How much is the standard area for glc analysis

2294

function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

DRL,

2675

what type of compounds do we see lod @ wat type compounds do we see m.c

Orchid,

3 9502

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

Ajanta,

1 7603

How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

Cipla, Rampex Labs,

4285

What the difference in loss on drying and residue on ignition

2 35181

Why irmoisture balance is used for corrugated box moisture testing

Leiutis, Lupin,

2404

why we are used 4,7,9,2 buffers for the ph calibration

Aurobindo, Enaltec Labs,

4 19635

In case of HPLC coloums what is the difference Between C8 & C18 coloums & how can we select difference type of coloums like Inertial ODS , Hypersil BDS , ODS etc.?

MSN Pharma,

4 33444


Un-Answered Questions { Chemistry }

if your product is soluble in 0.1n hcl and water then which you choose as media from these 2 media?

686


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

11522


What is photoelectric colorimeter?

1036


What do you mean by redox reaction? : Electrochemistry Corrosion

937


What is the role of stannous chloride?

1381


Define dipole-dipole force?

1213


why using HCLO4 in potentiometry?. what are the chacterestics of HCLO4.

3700


how much mass should be there in volumetric flask while in preparation of sample for assay? 

2588


why athanol-water mixtuere have maximum viscocity in wt% 40?

1731


An atom has 18 protons and 22 neutrons. Tell me its mass number?

996


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

4579


if you have given a blank water how you analyse by general analytical techniques?

2036


in which situation ion pair agent require to use?

749


In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?

932


Principle of single pan analytical balance

5145