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Chemistry Interview Questions
Questions Answers Views Company eMail

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1719

Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

1747

For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

1843

In Assy by potentio metry titration method how select MET U ,DET U, SET U,

2082

in sampling of raw material which side is pasted sampled labels

1783

why holium oxide prepared in 10% HCLO4 SOLUTION

1412

Why 162 mg NaOH used for 1N volumetric solution in 150 ml water then 54.5 ml diluted with 1000 ml

1843

What is the importance of rrf in rs by HPLC?

1 3142

Barc in chemistry

1310

Arrange by acidic values : phenol, nitrotolouene and o-cresol?

Flipkart, Wipro,

1028

What is the resulting solution when benzene and toluene are mixed ?

Flipkart, Wipro,

961

Which Formula Forms A Link Between The Thermodynamics And Electro Chemistry?

Godrej,

1082

Why use only methanol,used determinationof moisture content not use other solvents

1362

Why does a freely suspended magnetic needle always point North and South ?

1 1408

Explain the ANS Isotope?

1 1514


Un-Answered Questions { Chemistry }

what is meaning of wet analysis.

5699


WHAT IS THE USE OF STARTER ?????????

2362


Why is disodium salt of edta preferred to edta?

1471


If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

800


Did anybody have method for acetyl cysteine effervescnce tablet

2205


How does Actinium interact with other elements, and what are some notable chemical reactions or compounds involving Actinium?

564


What is the diference between residual solvents and organic volatile matter

1970


what is the syllabus for mahagenco recruitment drive for the post of chemist

3214


In testing of Cement the formula for water requirement for setting time is as below- Water required for setting time = NC x 0.85 The question is that what is the logic of 0.85 in this formula??

2379


What is the prime constituents of cement?

1187


Why purity angle should be less than purity threshold in peak purity

4192


Why potassium dichromate is used in calibration of uv?

1929


Tell me about analytical method validation in QC

6130


we shall use Dichloromethane in last stage of API.

3034


How to know the estimated LOQ concentration in ppm

1160