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

what is difirence b/w ROI&ROE

Pfizer,

1 9771

what is functionality of polymer? how can we get theoretical and practically?

Atul, Domax, Mohrish Pharmaceuticals,

2575

WHY POTASSIUM DICROMATE USING IN UV CALIBRATION

Apotex, Micro Labs, Rene,

1 19440

HOW DOES THE WATER MOLECULES ON CLOTHES EVAPORATES WHEN DIRECT HEAT IS NOT APPLIED BUT CLOTH IS STRECHED AND AIR IS PROVIDED? HINT:THIS METHOD IS USED IN MANY HOMES TO DRY UP THE CLOTHE WHEN DUE TO SOME CONDITIONS DIRECT SUNLIGHT IS NOT PROVIDED.

1 3821

What is the Baseline in HPLC.

Teva API,

2 12544

Why dst is used in kf for factor determination less than 1

Reddy Labs, Sun Pharma,

4 17971

why should we calibrate pH meter with 4,9.2 and 7.4 buffers particularly?

Celon Labs,

5 15430

why inject diluted standard solution in related substance analysis by HPLC?

Biocon, Sun Pharma,

3 17842

What is the Calcultion of S/N Ratio.

2 11374

What is the accepted microbial load in APIs as per USP.........?

2566

what are the checklist need to maintain in API manufacturing area as per USP requirements.......?

2931

Purified water Microbial load limits as per USP..........?

1 4909

Principle of HPLC in one sentance

Syngene,

8 19999

Why are using in Hi,zero air, Ni gass are used GC

Aurobindo, ELBS, Vimta Labs,

5 14441

what is the balance drift?

Torrent Pharma,

2 11868

Un-Answered Questions { Chemistry }

why we are using hexane in calibration of number of drop per mL

1800

Define a triglyceride?

1073

in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?

895

we shall use Dichloromethane in last stage of API.

3138

Why is sulphuric acid added during the preparation of standard fas solution?

1106

what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

4540

Arrange by acidic values : phenol, nitrotolouene and o-cresol?

1150

How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

3916

for which product require to do content uniformity? what is limit of cu?

883

4 Identify the substance oxidized, reduced, oxidizing agent and reducing agent for the following reactions

2537

How much is the standard area for glc analysis

2335

mode of absorption in alimentary canal?

2436

How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

4376

. Given that 2Hg2+ (aq) + 2 e- Hg22+(aq) E0 =0.92V Hg22+ (aq) + 2 e- 2Hg(l) E0 =0.85V Calculate standard free energy change and K for the following process at 25oC Hg22+(aq) Hg2+ (aq) + Hg(l)

6709

[3/28, 20:52] Manoj P Venkatpurwar: how many impurities require to inject in assay specificity that how we can find out? and in Rs also how?

851

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