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 6744

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

Mankind,

2 8486

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

Pfizer,

1 4809

HOW TO CALIBRATE HPLC OVEN

Mylan,

1 6821

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

2341

which light is used in FT-IR spectroscopy

Hetero,

6 18752

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 4972

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

1 3453

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

Medley Pharmaceuticals, Micro Labs,

3310

what is the difference between EP and BP

Novartis, Vimta Labs,

2 21294

Un-Answered Questions { Chemistry }

Explain acid gas?

1103

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.

2272

Explain the differences between organic and inorganic chemistry?

1171

sir, what does happen ............? naphthal+benzene(or)toluee........> ?

2239

Why are use silicon oil mr?

1261

How does Protactinium contribute to our understanding of Earth's history and the behavior of elements in natural systems?

663

Tell me about analytical method validation in QC

6243

Differentiate between modern periodic table and mendeleevs table?

1221

How you develop a method in HPLC?

2672

how decide the clining method and cleaning method validation require for this perticular products?

822

What is the purpose of adding urea?

1444

how can karl fischer's titration be used to estimate alcohols??????

2801

Explain what are enzymes?

1224

in hplc chromatogram started from left to right and in uv spectrum started from left to right

1021

Define ph?

1191

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