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 14619

what is the defferance between the potency and working standard

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

1 5982

what is the principle involved in determination of moisture content?

3 10823

what is difference between assay&purity&potency?

5 33465

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

Cipla,

1 4161

what is leading peak in hplc

Cipla,

1 12584

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?

3128

what is difference between drug products and drug substance?

DRL,

5 92228

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

Cipla, MSN Pharma,

1 4415

why we are adding sulpuric acid in residue on ignition

Aurobindo,

2 9057

how you determine moist.of NaOH sol or NaOH flacks

2184

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

1 5025

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

Matrix,

10 52318

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 11694

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

2280

Un-Answered Questions { Chemistry }

How do you express the total hardness of water?

1088

What is the difference between cracking, pyrolysis, destructive distillation, hydroforming, carbonization and dry distillation?

9746

Ph meter can show more than 14 ph reading? Why ph range in between 1 to 14 only?

694

what kind of question can be asked in interview for UV- VISIBLE & give me answer ?

3805

why we not use caffeine at 205nm for hplc calibration?

3266

How many electrons does benzene have?

991

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

1687

How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

3162

why is acetic acid less conductive than hcl?

1108

How to start the dissolution development for unknown tab?

1623

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

897

What is the difference between the photochemical reaction and photo-dynamic reaction?

2515

pharma industries oriented

2184

what is %labelled amount in content uniformity of dosage unit and its calculation?

5146

how to set sample and standard concentration in RS method?

845

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