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

Is it necessary to validate both assay and related substances for usp official methods for products.

Apotex,

6 14565

why we use a particular hplc column for a particular compound give reasons?please

Dr Reddys, Indoco Remedies, Natco,

2796

What is the difference between method validation and method verification

Biological.e.limited, Laurus,

1 6404

IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

Reddy Labs,

2511

why helium does not react with other elements?

3 7334

what is the difference between lod and loq?

Apotex, Aurobindo,

4 37631

What should be the level/ Percentage of Arsenic in Arsenic free zinc.

FDC, Laurus, Pharmaceutical,

2280

Assuming that the density of the solution is the same as the density of water (density of water=1.000g/ml), calculate the mass of water for both reactions using: mass of water = Volume of water Density of water. Mass of water =

Hetero, ONGC,

2597

What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

Dr Reddys,

1 5266

why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

Cipla, Elder, Vamsi Labs,

1 9893

How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

2617

Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?

CMET,

2791

why are not used methonol in kf titrator to find out water content in ketones?

Piramal Healthcare,

5 15533

Why are EDTA used to etimation of Ca,Mg etc, in Water analysis?

Reddy Labs,

3 10675

why we use kbr as constant in the FTIR ?

4 11120

Un-Answered Questions { Chemistry }

How to accelerate electron capture decay?

2422

Give the IUPAC name for [Co(NH3)5SO4]Cl

1317

Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

2915

process of Diclofenac sodium,IP.

2292

In the calculation of calorific value of any fuel why the latent heat of vap. of water is taken as 587 kj/mol whereas actually it is 540kj/mol?

2398

Define an electro chemical cell. Give one example? : Electrochemistry Corrosion

1056

What is polar hcl?

1143

2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

2269

how we change 0.1N KmNo4 solution to 0.01N KmNo4 solution.

2081

How is hardness of water caused?

1181

Explain the use of glacial acetic acid?

1168

Explain extraction of ephedrine from a mineral block?

1113

can you email me because I have a report and I need you to answer these questions if you would like to if not I completely under stand.

2190

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

2650

hi friends, dis is ramana reddy.i have been workining in bulk drugs as QC chemist.i would like 2 change d company.i want sample RESUME,OFFER LETTER,APPOINTMENT LETTER,PAY SLIP.if any body has these documents,pls send 2 my mail id i.e ramanareddy.sdpl@ymail.com

2388

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