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Chemistry Interview Questions
Questions Answers Views Company eMail

Difference between c18

Apothecon, Dr Reddys, Intas, IPQA, SUN, Torrent Pharma,

6 52699

principle of UV , PDA , RI detector in HPLC

Dr Reddys,

8714

mahagenco syllabus for the post of chemist

MahaGenco, Unimarck Pharma,

6426

What is post run in hplc?

Cipla,

1 16799

Tell me something about Vitamin A test method by HPLC

Lupin,

2628

what is induction on electrical insulators

2269

How to choose Normal phase or Reverse Phase HPLC method Conditions for given sample?

PharmaZell,

3 14677

why the most API molecule are in the hydrochloride form?

1 9631

IF HPLC CALIBRATION FAILED THEN WHAT YOU DO

6 36473

Optical Rotation*0.9477*100*200] Assay Of dextrose= ________________________________ 99.8* 200 why Factor=0.9477

Claris Lifesciences, Inven Pharmaceuticals, Levo,

1 15435

what is column chromotography?

ONGC,

2 7590

How you will select the runtime in HPLC for a drug in method development.

Aurobindo, GVK, Lesanto Laboratories,

6 21900

If compound Pka is 5 then which buffer you will select ?

Avra, GVK,

5 16602

what is the difference between BDS and ODS Columens and both are same or not

Intas, IPQA, Micro Labs, Vasava Engineering Private Limited,

2 73446

difference between HPLC & LC-MS

Lambda,

9 46418


Un-Answered Questions { Chemistry }

if peak get problamatic then what require to do?

742


Explain why acetic has less conductivity than hcl?

993


what is stero electronic factor.2 what is steric control factor and what is product control factor

2087


What is the function of diethyl amine?

1042


in dissolution if one bowl got 70 percent 2nd bowl got 80 percent and 3rd bowl got 90 percent then how proceed?

716


Does domestic/household used kerosene oil which is available in blue color (In India) can change its color over the due course of time say 8-10 years if keeping in plastic bottle? If so, in which color it will be turned to change, yellow or transparent or any other color. Please provide me the reply with strong technical approach. Since it has been asked during an interview. Please reply fast. I will be thankful to you if anyone can provide the supporting journals/write-ups/reference to favour of response.

1368


Explain how many moles of hcl are present in .70 l of a .33 m hcl solution?

981


Define Vulcanization?

1104


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

7482


What is titration?

1046


why we are using benzene, anyline in acetic anhdride assay titration method?

2063


Define:minerals and ores

2534


why we are using hexane in calibration of number of drop per mL

1663


[3/30, 13:29] Manoj P Venkatpurwar: How hplc column selection according to structure? How mobile phase buffer selection on molecule structure?

708


we can use expired sample for validation and analyst qualification?

751