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

Retention time & Relative Retention time Definition & between difference? How to Calculate response factor(RF) & relative response factor(RRF)?

MSN Pharma, Titan,

3 20797

why are using toluene in uv calibraion in resolution performance

MSN Pharma,

2 11209

why we make titiration of Iron with EDTA ?

Cipla, Sitec Labs,

1 9169

why antharacene use hplc calibration

ITC Infotech,

1 3962

hardness of distilled water

CAPL, Parabolic,

1 6023

What is difference b/w IR&NIR

Apotex,

1 5884

Why does boiler drum ph maintain from 9.5 to 10.2

1 7899

What is the definition of water content or moisture content,what is the procedure going on w.c amalysis?

Cipla, KIYI,

1 11131

how can you determine a compound acidic or basic?

Celon Labs, Cipla,

2 10872

For LOD and LOQ determination which method is accurate? (slopemethod or s/n ratio method)

Reddy Labs,

4 11784

how to develop the shorter run time for pharmacopeial methods having 100 min run time?

Reddy Labs,

3 11293

How you start the method development of unknown compound.

1 5988

How to determine water content of bis tetrazole amine mono ammonium salt

3548

Is there any difference in principal of reverse phase and normal phase chromatography? and why? Please update. Thank and regard

MSN Pharma,

3 11482

Why Nitric acid can be stored in Aluminium containers?

1 6824

Un-Answered Questions { Chemistry }

Define the term distribution coefficient in organic chemistry.

1182

whether ter weight is require when doing the water standerdisation

2069

what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

2343

What is density of a liquid?

1211

Arrange the following in their increasing polarity order Carboxylic acid, hydroxyl, phenyl, amino and aldehyde

1800

How to caluclate %w/v& %w/w ple give examples solids&liquids 10%NAOH W/W 10%W/V- 20%HCL W/W &W/V

2560

Actinium has potential applications in cancer treatment. Could you elaborate on how Actinium-225 is used in targeted alpha-particle cancer therapy?

731

What is determining factor in the oxidation reduction reaction?

1496

How are the waters classified based on the degree of hardness?

1199

Define chemical corrosion. What are the types of chemical corrosion? : Electrochemistry Corrosion

1075

What is the principle of Particle size analysis and zeta potential

2697

calibrtion procedue of LC-MS

2767

. 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

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

1659

Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

2894

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