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Chemistry Interview Questions
Questions Answers Views Company eMail

How to caluclate %w/v& %w/w ple give examples solids&liquids 10%NAOH W/W 10%W/V- 20%HCL W/W &W/V

Natco,

2060

why all liquid raw materials fallows residue on evaporation at 105Degree temp. but methanol bp 60Degree

Biocon,

1 3152

what is meaning of wet analysis.

Biocon, Shodhana,

5217

why using HCLO4 in potentiometry?. what are the chacterestics of HCLO4.

Biocon, RKM,

3190

what is peak purity? how may types of methods to determine peak purity?

Mylan,

3 13275

why using Potentometry What Purpose? differance between manual and potentiometry? why using Some of materials in usig potentiometry? What is use of mericuric acetate in Potentiometry

Biocon,

1 4908

iam using ph instrument lab india make.3ponit and 5point.in calibration time 3point slope will come 98.89and 96.87.that limit is 85 to 105.what basis slope will come.any calucalation between them.5point wiicome slope 99.89?why 3p0int came 2 values

 1 4482

iam usig ph buffers merk. manually how to prepare ?

 1776

Sulphated Ash incresed it will effect on product yield?

Biocon, Lupin,

3 4677

in loss on drying Why follows on constant weight not more than 0.5 mg, any region

Biocon,

1 13652

difference between selectivity and specificity

Troikaa Pharmaceuticals,

2 12125

What is Displacement Reaction .

 2 3672

when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

ABC,

1510

differnc btw c18 and c-8 column

Cipla,

3 12077

use of stry light

 1 6368

Un-Answered Questions { Chemistry }

Why Ethanol is Used for Standardization of GC Head space?

3716

why are measure gas flow " ml " in Gas chromatography

1152

Why to use propyl paraben in HPLC gradient calibration

6072

Does domestic/household used kerosene oil which is available in blue color (In India) can change its color over the due course of time say 8-10 years if keeping in plastic bottle? If so, in which color it will be turned to change, yellow or transparent or any other color. Please provide me the reply with strong technical approach. Since it has been asked during an interview. Please reply fast. I will be thankful to you if anyone can provide the supporting journals/write-ups/reference to favour of response.

978

Why is ammonia-ammonium chloride buffer added?

689




Name the molecule which is characteristically prevalent in sour milk and tired muscles?

552

could negative ions be produced by bombardment process in mass spectrometry?

1284

how require to select dissolution media? what is discrimination?

307

What is pka of acid?

770

what are UV rays absorbs slightly?

1635

Explain acid gas?

587

how can I make the copper get white bye any salt or acit?

1663

State beer-lambert’s law.

647

Explain how do you extract ephedrine from a mineral block?

562

Name the element which was used to make the first atomic bomb?

595

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