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

In chromatograpbic purity 90% is there, in assay 70% is there. How will you prove remaining 30%.

Dr Reddys,

3 8751

about analytical chemistry

Apotex,

2063

formula of petrol?

Biocon, Reliance,

2 5776

What is differences between normality and molarity.in which cases both are used?

GVK,

1 7755

in gas chromatography what is the difference between gas flow rate and average linear velocity ?

USV,

2656

what are the ideal conditions for coloumn storage

Claris Lifesciences, Srikem Laboratories,

3 7433

i want to know about headspace and interview question on headspace

Srikem Laboratories,

1 5614

For water content determination, if the material is insoluble in methnaol and ethylene glycol mono methyl ether, what other diluent can we use.

2085

class of solvent regarding Residual solvent e.g. Acetone his class

1 4230

What is unit of mass defect?

MSC,

1 3195

What is reagent?

BSC, Hygro Chemicals,

4 6366

why we multiply 1000 in the determination of kf factor ?

Stellence Pharm Science,

3 8888

why we measure PH of a solution in PH only why not POH ?

Stellence Pharm Science,

1 5121

What Is the mechanism of pyridine and methanol .what products produce

Alkem Labs,

1 3923

In Dissolution Test why limit is define Q+5% what is the role of +5%.

3161

Un-Answered Questions { Chemistry }

What is colorimetry?

1196

In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

2270

What is the difference between Assay and Purity?

1608

What is related substance by HPLC impurity limits as per USP?

1164

composition of german silver

2391

what is silicon chip

2153

Protactinium-231 decays to Uranium-235. How is this decay used in radiometric dating and the determination of geological ages?

634

Basic principle of ESI?

2214

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

1655

which question ask me in grasim in inerview?

2288

process of Diclofenac sodium,IP.

2290

why holium oxide prepared in 10% HCLO4 SOLUTION

1500

What is the prime constituents of cement?

1326

How to start the dissolution development for unknown tab?

1742

If combination product how require to identify which imp is of which api?

870

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