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

WAHT IS THE ELUTION ORDER IN GAS CHROMATOGRAPHY?

Micro Labs,

3 14902

what is the defferance between the potency and working standard

Arbro Pharmaceuticals, Caplin Point, ECOlogics, Matrix, Orchid, Venus Remedies,

1 6148

what is the principle involved in determination of moisture content?

3 11066

what is difference between assay&purity&potency?

5 33961

why we do the calibration of limit of stry light in hplc & uv

Cipla,

1 4345

what is leading peak in hplc

Cipla,

1 12786

Cholesterol is a compound suspected of causing hardening of the arteries. The formula of cholesterol is C27H46O. a. A sample of cholesterol is isolated from the arterial lining of a 60-year-old American male. What is the formula of this compound? b. Cholesterol is extracted from a chicken’s egg. What is the formula of this compound?

3228

what is difference between drug products and drug substance?

DRL,

5 92705

From peak purity spectrum, where or at which point peak purity angle & purity threshold is checked?

Cipla, MSN Pharma,

1 4629

why we are adding sulpuric acid in residue on ignition

Aurobindo,

2 9347

how you determine moist.of NaOH sol or NaOH flacks

2270

what is concentration of oxygen in U.H.P. grade N2 cylinder

1 5170

water is more polar than acetonitrile.but in reverse phase chromatography peaks elute earlier when we increse Acetonitrile.what is the reason.

Matrix,

10 53069

I got 88.0 % assay for a drug in HPLC analysis for same injection i got 40.0% related substances is it possible? what is the relation between results of assay and purity?

5 12105

how to mesure a relation of assay by HPLC and purity in results?

2379

Un-Answered Questions { Chemistry }

WHY given much noise PDA dector then VWD Dector

2152

Explain substituted hydrocarbon?

1106

WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

2671

What is the role of silver sulphate?

1193

What is the easiest, (Less compound mixtures, basically), way to make coca.. ;)

2385

Which organic compound is used as a fuel in jet air crafts?

1315

what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

2082

How to set specification of assay, fisdolution and related substances?

936

Polymer chain growth can be terminated by b-hydride elimination or by reaction with h2. What is one advantage of the h2 reaction? : Polymer Chemistry

1233

what is diffrence between specificity and selecivity?

837

why cone formation during dissolution?

852

How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?

792

A ha tc is actual defination of retention time?

1668

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

7683

Can a Nascent Hydrogen be used for fuel cell without damaging the equipment and if so how good would it be compared to other type of hydrogen.

2240

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