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

General Chemistry (478)
Chemistry AllOther (190)

Chemistry Interview Questions

Questions Answers Views Company eMail

In pharmaceuticals formulation OOS applicable in Raw Material(which is not manufacturing in the company. and purchase by approved vendor)).Why?

Orchid,

1 9120

Is LOD and LOQ values differ for different substrat (eg milk, tissue, egg etc.) for same compound (eg pesticide flumethrin)in same instrument(eg GC)?

Pharmaceutical,

1 4738

Can we use water in process (Intermediate stage) during phase -I validation of water system.

GSK,

1 5402

Can we use Poteble water in process ? How

1 4646

why we use only six bowls for dissolution of a drug

Cipla, Natco, TelePerformance,

1 21734

On which pharmacopoeia basis we can calibrate instruments like HPLC,GC,UV,DISSO,IR etc...

Cipla, Laurus, Micro Labs,

9 26021

why PH range 0-14 explain

DRL, Reddy Labs, Saint Gobain, Viva,

5 65460

What is the difference between QA & QC ?

Optimus,

5 25212

How to make up 100ml of a solution cintaining compound A at 95µg/ml and compound B at30µg/ml for an HPLC reference standard.

3 7853

why we prefer kbr for ftir than kcl?

Aurobindo,

5 14605

How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

Graviti Pharmaceuticals, Vimta Labs,

2441

EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

2694

in dissolution in one tablets two molecule one is losartan & second is HCTZ losartam is complies in s1 stage & hctz is complies in s2 stage then how to report result losartan s1 stage result or losartan s2 stage result

Dishman,

1 2887

why we use polystyrene film for ftir calibration?

Rakshit Drugs,

4 19446

when we covert any substance into vapour state from solid state, is it ionized or not?

2 5189

Un-Answered Questions { Chemistry }

What general group of organic compounds are not oxidesied in the cod test?

1562

process of Diclofenac sodium,IP.

2290

What are the uses of glacial acetic acid?

1183

why we use a particular hplc column for a particular compound give reasons?please

2794

what is the difference between poolymer concrete and normal concrete

2312

What is determining factor in the oxidation reduction reaction?

1490

State beer-lambert’s law.

1232

If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

912

Can we consider in purity angel

1884

In IR spectra, generally a molecule vibrates without apply emr or ir light?

2032

How are atoms of the isotopes different from one another? Two isotopes of carbon are carbon-12 and carbon-14.

1078

For water content determination, if the material is insoluble in methnaol and ethylene glycol mono methyl ether, what other diluent can we use.

2084

Can you provide an overview of the properties and characteristics of Protactinium and its placement in the periodic table?

701

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1814

What is the principle of Thermal conductivity detector and FID?

2786

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