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Chemistry Interview Questions
Questions Answers Views Company eMail

in hplc calibration we are using 0.05% acetone why we are using that one and what happen when its conc increases or decreases

Aurobindo, Cadila, Martin,

4 29704

loss on drying we applied vaccum for some compounds and some compounds are at 105c why

 3 11041

why we are calibrating autopolarimeter with quartz control plates

 1 5048

what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

GHI, Siemens,

9408

why we use TLC?

 8 19632

why disodium tartarate is used for autotitrator calibration

Cipla, Micro Labs,

2 12113

perchloric acid&glacal acetic acid both are acids but reaction is complete in volumetric titrations.how?

 1 10378

what is the cleaning validation?

BioPlus,

1 8833

acetic acid is weak acid & perchloric acid is strong acid.but how perchloric acid is soluble in acetic acid

AVT, Hetero,

3 10334

sir, what does happen ............? naphthal+benzene(or)toluee........> ?

 1673

if tis below reaction does happaen means...,what is the end product.......? naphthal + toluene(or)benzene............> ?

Hetero,

1 4429

What is polymorphism?which type of compounds exhibits polymorphism?

Torrent Pharma,

2 8545

what is the basic principle of conductivity meter

Hetero,

4 27844

Column selection in HPLC method development?

 1 12166

which of the following is the best conductor of electricity?

 4 4723

Un-Answered Questions { Chemistry }

why digestion require in icpms?

292

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

100

Explain what is the net charge of a non-ionized atom?

536

Actinium is often considered a rare and scarce element. How does its rarity impact its industrial uses and research purposes?

96

Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

2190




What is column in chromatography?

1751

why we need to synthesize impurities of midazolam

1768

What are some of the polymers that you encounter every day? Describe their physical properties. : Polymer Chemistry

680

The use of vermilion on rubric of the Tartar Relation is confirmed by the presence of three lines attributed to HgS. Why should this diatomic have more than one vibrational line?

2175

Describe the process of Actinium extraction from its primary sources and how it's obtained for various applications.

107

Why we use DPPH in ESR and DPH in fluorescence spectroscopy?

2066

why salisylic acid not using now days for disdolution calibration?

290

Actinium has potential applications in cancer treatment. Could you elaborate on how Actinium-225 is used in targeted alpha-particle cancer therapy?

123

we shall use Dichloromethane in last stage of API.

2609

Why are metals often good catalysts? : Polymer Chemistry

549

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