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Chemistry Interview Questions
Questions Answers Views Company eMail

How to prepare Paracetmol?

Granules,

1 6269

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

1 4795

In the test for control of absorbance in UV calibration why do we use only potassium dichromate and what is purpose of taking a specified amount of 57.0-63.0mg?

Aurobindo, Cipla, FDC,

8 58921

In the test for control of absorbance in UV calibration why do we use only potassium dichromate and what is purpose of taking a specified amount of 57.0-63.0mg?

Reddy Labs,

1 10035

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

6 30599

what is the use of performing tapped density in pharmaceutical industry

1 11006

WHICH PRESSURE IS HIGH EITHER INJECTOR OR DETECTOR IN GAS CHROMATOGRAPHY

Avon Organics, Dr Reddys, Reddy Labs,

4 11041

What is the procedure for UV-spectrophotometer calibration?

6 62695

What should be the calibration procedure for wavelength accuracy in case of HPLC?

4 15866

How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?

NCL,

3356

How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

NCL,

3864

FDA MHRA

2598

what is normal phase,reverse phase.

3 8438

How can we Qualify a unknown impurity by HPLC

3 13252

How can be set a responds factor for evaluating a unknown impurity by HPLC

Orchid,

2408


Un-Answered Questions { Chemistry }

Why be is not soluble in liquid ammonia?

1112


what is the difference between elctrefining and electrolysis?

2251


we shall use Dichloromethane in last stage of API.

3089


if you given one product then which tests you will perform?

709


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

2113


what are the checklist need to maintain in API manufacturing area as per USP requirements.......?

2859


What are some common compounds or chemical reactions involving Protactinium, and how do they contribute to our understanding of this element?

655


Define an electrochemical corrosion. What are the types of electrochemical corrosion? : Electrochemistry Corrosion

980


why are measure gas flow " ml " in Gas chromatography

1661


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

4489


How doing qbd practically?

979


how to get accurate result for Residue on evaporation in purified water

1648


How BIS Decedied the LSF value 0.66-1.02 with calculation.

2182


Write the structural formula for edta.

1094


What is the role of a catalyst? : Polymer Chemistry

1019