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Chemistry Interview Questions
Questions Answers Views Company eMail

why KF factor is between 4.5 to 7.5 mg/ml ? why ? why sometime pyridine is used in analysis like in raw material solvent like acetone etc?

Aurobindo, GVK, Sohan Healthcare,

11 65574

Acid value defination is numbber milligrams of KOH required to nuetralise the acid present in one gram oil & fats but why not use NaOH for nuetralisation?

 5 10156

what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

Neuland,

3983

What is the Column Endcaping in HPLC ?

Aptuit Laurus,

3 13745

When performing Moisture content how to you say only Methanol react with water not product Explain?

Orchid,

2 9214

why lead acetate s used in the Limit test of Arsenic? what role Lead Acetate plays????

 1 16801

give me method of calculating co relation of coefficient for HPLC,SOR & ANY OTHER

 1 3248

difference between pH & pOH ?

 4 20630

why Nacl solution called as brine solution?

Infosys, ION Solutions,

3286

why is wick needed to burn a candle ?

 3 4510

what is hollfman degradetion

 4 11525

who is the father of sterio chemistry

GVK,

4 6984

what is purine metabolism

 1 3919

what r the reasons to get peak telling?

Cipla,

6 14242

What is hybridyzation ? How can i find that which type hybridyzation in perticular compound like in CH4(hy is sp3).

 1 3423

Un-Answered Questions { Chemistry }

could negative ions be produced by bombardment process in mass spectrometry?

1284

Why is ammonium hydroxide added to the brass solution?

793

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

1965

on saturation solubility study data how we can find out the bcs class of drug?

356

Protactinium has a relatively short half-life for some of its isotopes. How does this characteristic impact its practical uses and research?

127




what is allowable limit Of stray light for a spectrophotometer laboratory instruments ?

984

What is third generation HPLC Columns?

1505

effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?

322

What forms the basis for colorimetric determination?

716

How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

2713

What is the role of mercuric sulphate?

558

What is stepping ripple and step accuracy

688

What are acounting Pi electron's?

1856

Why ph scale range is 14?

610

how require to interprit the method precision data of hptlc?

291

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