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Chemistry Interview Questions
Questions Answers Views Company eMail

why we get only one peak in assay by hplc but in rs by hplc get more peaks

MSN Pharma,

1 11462

In performance Check of GC Why Hexadecane Peak is Considered 

Asian Paints, MSN Pharma,

3008

Is it required to inject 6 injections for % RSD of a system suitability in lc or gc

Raks Pharma,

3 13658

Why do we use KCl ,K2Cr207,Toulene & Halonium oxide for the caliberation of UV

Apotex,

2 16319

what is rt and rrt? how we find rrt? relation between rt and rrt/

Cadila,

1 19149

why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?

Avra, Granules, Orchid,

5 21864

What is method validation in quality control

Alchem,

1 4941

Why we use uracil and caffeine in hplc calibration

Alchem, Reddy Labs,

6 29716

hplc assay limit 98.0 to 105 why

Aurobindo, Hetero,

2 14015

uv,ri,pda detactor principles ?

Aurobindo, Mankind, ZCL Chemicals,

1 4394

ex:this product used c18 column but same product used c8 column what happend ?

Hygro Chemicals,

2 6691

HPLC Calibration gradient method why used union ?

Hygro Chemicals,

2 6179

what are stereomers? how are they classified?

MSN, Reddy Labs,

3380

If mass balance is not passing in forced degradation in method validation that method is suitable or not?

Aurobindo, Dr Reddys, Reddy Labs, Wockhardt,

1 8930

Why we compare unequal concentrated solutions in heavy metals test. For example comparing the test solution with 1 ppm lead standard and telling it's less than 20ppm?

Micro Labs, Mistair,

1 7761


Un-Answered Questions { Chemistry }

What can be the supporter of combustion except oxygen.

2778


Explain the function of a monosaccharide?

1008


How does Protactinium contribute to our understanding of nuclear fission and fusion reactions, and what research has been conducted in this area?

564


What group of elements were called the inert gases?

1098


what is mean by dissolution biowaiver study?

884


Why is disodium salt of edta preferred to edta?

1495


What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

2636


What is density of a liquid?

1080


Explain how do you separate the colors of ink?

927


Principle of single pan analytical balance

5114


Name the element which has the following ground-state electron configuration: 1s22s22p6?

934


before starting analytical method valodation what you checking? and how giving preference to start validation?

765


what is mean by ambient temperature?

892


which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc

2140


Explain the dipole moment direction for methanol?

1081