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

stability study is going on up to 3years for famotidine-USP but the pharmacopeia is revised and tlc test is replaced with hplc test. At the 4th year frequency the product is failed in hplc test .how can i assain the expiry or retest date and can i stop or continue the programme?

Nakoda Chemicals,

2 6623

how to correct peak when peak comes broader in shape? How to do calibration of HPLC?

Mankind,

2 8362

why bottles of Hazardous chemicals or solvent are available in round shaped only?

Pfizer,

1 4745

HOW TO CALIBRATE HPLC OVEN

Mylan,

1 6736

What is importance of pH in the Heavy metal test and How it effect on the test results?

2283

which light is used in FT-IR spectroscopy

Hetero,

6 18528

Please do not join if u got offer in oncotherapies ltd (STRIDESARCOLAB)especially Mr.Mahesh Bhatt team because job is not secure his team and doesn't have confidence on him becareful this offer?

Strides Arcolab,

1 4903

In partical size by malven,which parameter is generlly change for development of dry and wet method.

1 3380

As per ICH related substances stability trend limit from initial to shelf life

Medley Pharmaceuticals, Micro Labs,

3253

what is the difference between EP and BP

Novartis, Vimta Labs,

2 21132

Un-Answered Questions { Chemistry }

why is their exotherm while addition of reducing agents in reduction reaction?

2355

My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

1596

Acid value definition is number milligrams of koh required to nuetralise the acid present in one gram oil & fats but why not use naoh for nuetralisation?

1152

Why is glass electrode called an ion selective electrode?

1007

in sampling of raw material which side is pasted sampled labels

1838

Suppose we prepared pH buffer solution in lab.and calibrate against NIST solution, and same shall going to used upto 30 days. is it possible to stable pH and appearance? suggest?

1898

Define electrochemical series? : Electrochemistry Corrosion

1010

Shall i get the model question papers for junior lecture of Andhra pradesh

2789

How to caluclate %w/v& %w/w ple give examples solids&liquids 10%NAOH W/W 10%W/V- 20%HCL W/W &W/V

2503

How to determine water content of bis tetrazole amine mono ammonium salt

3486

Define the term distribution coefficient in organic chemistry.

1127

What should be the level/ Percentage of Arsenic in Arsenic free zinc.

2233

Explain acid gas?

1046

HI, I AM SUNIL BISHNOI.I AM PREPARING FOR ISHRO ASTRONOTES EXAM.PLEASE TELL ME ALL ABOUT THIS.

2484

How to accelerate electron capture decay?

2371

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