1. Categories >> Sciences >> Chemistry
  2. Suggest New Category


Chemistry Interview Questions
Questions Answers Views Company eMail

how to get accurate result for Residue on evaporation in purified water

 1111

(CH2)n + nO2. ---->Co2 + nH2O + energy what is this mean with details

CU,

1113

Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

 1209

In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

 1445

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

 1277

A ha tc is actual defination of retention time?

 1054

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.

 975

How to check hplc detecter sensitivity?

Gland Pharma,

1 1470

(0.41)d what is d?

Gland Pharma,

1 2030

How to estimate potassium?

 1 1421

1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

Granules,

1298

My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

 1101

what is peak purity and its formula

 1 1539

Why potassium dichromate is used in calibration of uv?

 1376

Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

 976

Un-Answered Questions { Chemistry }

what is functionality of polymer? how can we get theoretical and practically?

1928

What are the advantages of potentiometric titration?

639

how require to set assay concentration for standard and sample?

355

What is the unit of ph?

606

What is blank solution?

614




we can use expired sample for validation and analyst qualification?

292

what happens to the unit particles of a solute when it dissolves on a liquid?

1707

If suppose 10 methods of dissolution given in pharmacopoeial for single content product then which method out of 10? or all 10 require to follow?

522

What is protein - according to chemistry?

680

What is the easiest, (Less compound mixtures, basically), way to make coca.. ;)

1824

i am going to face exam for the post of executive trainee (chemistry) in M.P Power generation company,i want to know the level of exam ,type of questions can be asked,and about any book whigh i can refer.

1944

inhouse product is in capsule form in combination and RLD is in tablet form then can we proceed for multimedia CDP? in inhouse capsule product disso is paddle with sinker in release media is there then RLD product in tablet form then with same as paddle with sinker we can proceed n.a.?

278

What is the bluish white precipitate formed after adding ammonia solution?

587

how to prepare for the exam of ongc please give some idea

19666

what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

1794

For More Un-Answered { Chemistry } Questions Click Here