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Chemistry Interview Questions
Questions Answers Views Company eMail

How to prepare Paracetmol?

Granules,

1 6334

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

1 4882

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 59212

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 10129

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

6 30887

what is the use of performing tapped density in pharmaceutical industry

1 11098

WHICH PRESSURE IS HIGH EITHER INJECTOR OR DETECTOR IN GAS CHROMATOGRAPHY

Avon Organics, Dr Reddys, Reddy Labs,

4 11185

What is the procedure for UV-spectrophotometer calibration?

6 62925

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

4 16003

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,

3405

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

NCL,

3916

FDA MHRA

2656

what is normal phase,reverse phase.

3 8576

How can we Qualify a unknown impurity by HPLC

3 13376

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

Orchid,

2463


Un-Answered Questions { Chemistry }

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

2176


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

1035


in which situation ion pair require to use?

885


How many moles of sodium hydrogen phosphate can be prepared from 3 mol of sodium hydroxide and phosphoric acid?

2447


In what ways can Actinium be used in conjunction with other elements or compounds to create new materials or compounds with specific properties?

694


naphtha and hexane mixture can be used a fuel or not

2499


Which are the diffrent grades of api in pharma?

820


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

2463


What is dose dumping? why require to do?

1051


What is acid anhydride of h2co3?

1072


what is the purpose of using cyclhexane in synthesis?

4327


In rs method development when we are going area normalization method to dilute standard method?

1567


Explain the some importance of organic chemistry?

1213


Suppose u have combipack product and u get 2 or more peaks which are other than there placebo then what we can do

2370


The reaction of an acid with an alcohol to form an ester and water. What is the process?

1080