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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 22020

how do you make a amine sugar

Al-Manhal, Reddy Labs,

1912

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

 2 6682

How to know HPLC column performance?

Meghmani Organics,

4 11725

What is heavy water

Meghmani Organics,

3 7759

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 4510

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

 2389

Why PH range from 0to14.

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

2 13150

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

Cipla, Reddy Labs,

2 5331

give an example of secondary standard (solution).

1 4527

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

 2 6852

difference between instrumenent and equipment

 6 12096

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 2923

What is the principle of GC/HPLC ?

BioCan, Biocon, Megafine Pharma,

4 55780

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

 1 5739

Un-Answered Questions { Chemistry }

In pickling process of titatium with HCL . how to know if the acid is not effective after pickling several batch. is there any test to know it. (not practically)

1125

[3/28, 20:52] Manoj P Venkatpurwar: how many impurities require to inject in assay specificity that how we can find out? and in Rs also how?

351

How hydrate is forming along with API?

1802

Explain the process of obtaining Protactinium from its primary sources and its purification methods.

137

What is pka of acid?

776




Assuming that the density of the solution is the same as the density of water (density of water=1.000g/ml), calculate the mass of water for both reactions using: mass of water = Volume of water Density of water. Mass of water =

2083

which batch require to use for analytical method validation?

335

what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

8439

. 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)

6010

what is the difference between potentiometric titration and karl fischer titration?

2421

what is the structure of DOWEX-50

4925

However ozone is heavier than oxygen still ozone is up there in sky why?

542

Explain what is the net charge of a non-ionized atom?

547

what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

1488

discuss the diffrent types of chromatography and their uses. In not more than 10 papers oc not less than 8 papers

1630

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