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Chemistry Interview Questions
Questions Answers Views Company eMail

what is use of acetonitrile compare to methanol in RP-HPLC Method devlopment

Neuland, Orchid,

7 24498

how do you make a amine sugar

Al-Manhal, Reddy Labs,

2366

is a bonded water molecule in an organic material can be easlisy and accuractly determined by KF rather than LOD

2 7772

How to know HPLC column performance?

Meghmani Organics,

4 13385

What is heavy water

Meghmani Organics,

3 8990

What will be the effect on HPLC analysis result if three mobile phases given separately through three valves and same proportion mixed together and given by one valve?

LOIL,

1 5269

Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

2865

Why PH range from 0to14.

College School Exams Tests, Reddy Labs, Wings Customer Care,

2 14399

what are the different by which a new molecule can be characterised ?

Cipla, Reddy Labs,

2 6396

give an example of secondary standard (solution).

1 5408

why you are using benzoic acid for water content determination in TEA

2 7919

difference between instrumenent and equipment

6 14170

mixed 1.0 ml of methanol and 1.0 ml of toluene and injected in gas chromatography.will you prove that both solvents are in the ratio 1:1(not by area normalization)

1 3778

What is the principle of GC/HPLC ?

BioCan, Biocon, Megafine Pharma,

4 57549

pH range of methanol and acetic acid is ........

1 6498


Un-Answered Questions { Chemistry }

why we need to synthesize impurities of midazolam

2260


what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

3667


State beer’s law.

995


in which situation require to use paddle and basket?

738


Define oxidation potential and reduction potential? : Electrochemistry Corrosion

1200


What is the white precipitate produced at the end of point?

998


Suppose we prepared pH buffer solution in lab.and calibrate against NIST solution, and same shall going to used upto 30 days. is it possible to stable pH and appearance? suggest?

1898


How to find peaks in ftir chromatography

1677


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

4268


How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

1778


on the basis of bcs class how to proceed the solubility?

780


Explain the ionic equation for hcl-naoh?

1032


mode of absorption in alimentary canal?

2390


How are ph and pka related?

1107


What is equivalent conductivity?

1222