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

Which one of the Following is not Aromatic? 1)Cyclotetrane 2)Benzene 3)Napthalene 4)Anthracene

8 19158

what is the difference between simple distillation and differential distillation

1 10332

Describe your experience with analytical instrumentation?

Alembic, Apotex, Aurobindo, DLF, Enal Drugs, Lupin, Natco, Pharma,

3 39076

Do you know what Trace metal clean technique is?describe that technique?

Mylan, Nirma, Oil and Gas Jobs, Reddy Labs,

1 10023

Describe your experience with quality assurance and quality control analyses?

Aurobindo, Dr Reddys, MSC, Reddy Labs,

11 39239

Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

Apex, BNM, Ranbaxy,

2707

Do you have experience with organic extractions or tissue digestions?

GVK Biosciences,

1 8103

How many stereoisomers of phenylpropylene oxide are there?

Mankind,

1 6693

How many isomers have the name bromomethylcyclopentane?

5 13669

Pure (S)-2-butanol has a specific rotation of +13.52 degrees. A sample of 2-butanol prepared in the lab and purified by distillation has a calculated specific rotation of +6.76 degrees. What can you conclude about the composition?

1 6760

Trimethylamine is a pyramidal molecule. What is the hybridization at nitrogen?

Bluepin,

5 18765

which functional groups are present in cortisone?

2 24182

How many degrees of unsaturation are there in benzene?

2 12916

What are the major products formed when acetic acid and ethanol are added to water and the pH is adjusted to 7.0?

3 7162

What organic compounds have the basic formula (CH2O)n?

8 80424

Un-Answered Questions { Chemistry }

What are the uses of glacial acetic acid?

1117

why we should take dst factor for below 1%moisture samples

2666

how you fix the limits of impurities?

837

cefoperozone and sulbactam inj. hplc test method

2691

why we use glass fiber filters use in some situation?

800

Mention a few application of cod test in environmental engineering practice.

1234

HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

2246

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

2732

Why do we use vaccum in Loss on drying test?

1678

What is modern definition(iupac) of ph?

1242

what is the difference between elctrefining and electrolysis?

2249

My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

1596

In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?

925

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

856

What is the use of tlc and hplc? And when and where use?

1160

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