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

Why pH Range has been fixed as 0 to 14 ?

Akums, Cipla, Matrix, SUN,

1 7478

How you develop a method in HPLC?

CU, Perrigo, Wockhardt,

2617

what can saybolt viscometer do?

1 8402

why using buffers in hplc inteed of water

5 14467

How long we can use hygroscopic reference standard in terms of water absorb.I mean in line with respective monograph's specification or more than that?

1 3139

Why we use methy Ethyl Propylparabine For HPLC Calibration

1 5528

What is use of LOD and LOQ in validtion and give range and in calculation why we use 3.3* LOD here why we use 3.3

Dr Reddys, IPCA, Reddy Labs,

2 6855

In specificity what parametrs are consider why that parametrs

2 7003

ash or residue in that what will be there.

3 6667

How can we determine Moisture content of HI?

Cipla, Reddy Labs,

1 3444

What is difference between oos

Gennex,

7 28197

what is the differance between Analytical and semi micro balance?

2 13834

In the method validation proceedure,lod & loq calculation we use the formulae for LOD=3.3*SD/slope and for LOQ=10*SD/slope,why we use 3.3 & 10 in the formulae?

1 11034

In HPLC Chromatographic separation Resolution equation is Rs = 1.18 (tR2 –tR1)/wh1+Wh2, Where, tR2 and tR1 is run time of eluent ratios of the distances from the point of application to the centers of the spots and the distance travelled by the solvent front from the point of application (retardation factor), and Wh1and Wh2 , is peak width of at half height. What is 1.18 ?

1 7325

what is mean by theoritical plates(not formula) ?

Micro Labs,

4 14824

Un-Answered Questions { Chemistry }

Define a substituted hydrocarbon?

1068

How to accelerate electron capture decay?

2371

Practically why we get negative absorption in UV SPECTROPHOTOMETER when the time of cleaning sample analysis. is negative absorption in Uv valid or not?

2404

How will you calculate how many moles of glucose present in 320 ml of 5.0 m of glucose solution?

1101

What is meant by transmittance?

1081

Why is ammonia solution added while preparing edta solution?

1387

WHAT TYPE OF QUESTION ASK FOR POST SENIOR TECHNICAL ASSISTANT IN DRDO

8088

What are the electrodes used in potentiometer titration?

1022

Describe the historical significance of Protactinium's discovery and its naming.

651

what is the purge flow & how to calculate

2648

An atom has 18 protons and 22 neutrons. Tell me its mass number?

994

In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

3129

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

2567

What is the composition of ferroin?

1098

Define oxidation potential and reduction potential? : Electrochemistry Corrosion

1202

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