Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

General Chemistry (478)
Chemistry AllOther (190)

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 32149

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

3 12504

why we are calibrating autopolarimeter with quartz control plates

1 5858

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

GHI, Siemens,

10014

why we use TLC?

8 22167

why disodium tartarate is used for autotitrator calibration

Cipla, Micro Labs,

2 13455

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

1 11309

what is the cleaning validation?

BioPlus,

1 9688

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

AVT, Hetero,

3 11941

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

2185

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

Hetero,

1 5125

What is polymorphism?which type of compounds exhibits polymorphism?

Torrent Pharma,

2 9685

what is the basic principle of conductivity meter

Hetero,

4 29587

Column selection in HPLC method development?

1 13203

which of the following is the best conductor of electricity?

4 6214

Un-Answered Questions { Chemistry }

before starting analytical method valodation what you checking? and how giving preference to start validation?

817

How does Protactinium contribute to our understanding of Earth's history and the behavior of elements in natural systems?

616

Define what is avogadro’s law?

1086

What is pka of acid?

1171

What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

1910

Why there is no bond with 100% ionic character...??

1831

How can I develope method of dissolution by HPLC OR UV

2418

EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

2656

give clarity of linearity and range in method validation

2428

In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

3136

Why only 1.2 million lux hours require in photostability study?

1054

What is the difference between cracking, pyrolysis, destructive distillation, hydroforming, carbonization and dry distillation?

9818

Acid value definition is number milligrams of koh required to nuetralise the acid present in one gram oil & fats but why not use naoh for nuetralisation?

1160

What are the electrodes used in potentiometer titration?

1035

In performance Check of GC Why Hexadecane Peak is Considered

3059

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