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Chemistry Interview Questions
Questions Answers Views Company eMail

what is acidity of a base?

 2 4508

what does 50 denote in dowex 50 ????

 2108

How to choose the which salt is suitable for mobilephase

Cipla, Ranbaxy,

2659

what is the difference between poolymer concrete and normal concrete

 1748

What is quality controle.

 6 10183

What is Standard deviation

Cipla,

2 11027

When you get Moisture content by KF higher than by LOD, what does this indicate?

 7 15779

what is deference b/w the working standard and reference standard

 4 25801

How do we fix the sample concentaryion in hplc method development. what is the basis?Thanks in advance

DRL, Glenmark, Orchid,

4 19286

Suppose we prepared pH buffer solution in lab.and calibrate against NIST solution, and same shall going to used upto 30 days. is it possible to stable pH and apperance ? suggest ?

Orchid,

1 5344

what is rs test why we are perfoming rs test

 2 9551

In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

Orchid,

2716

What is difference between silica used in TLC and HPLC column

Cipla, Meghmani Organics,

4 17750

Why Urasil and Caffeine use for HPLC wavelength accuracy calibration. which is most suitable, Why? other than these which can be used?

Cipla,

7 16961

When we r doing processing method for sst in Empower software by HPLC, What value has to give in void volume and as per which pharmacopia!

Micro Labs, Mylan,

5 13430

Un-Answered Questions { Chemistry }

Explain Thiele's structure for benzene. What is the difference between thiele's structure and modern structure (resonance hybrid) of benzene?

4625

What group of elements were called the inert gases?

585

in stress study if your api not soluble in hcl naoh h2o2 then what require to do?

334

which situation gc hs and gc als require to use?

301

How much is the standard area for glc analysis

1754




if rsd failed then what require to do?

326

The rate constant for the second order reaction is 0.54/M.s at 300oC. How long (in sec) would it take for the concentration of NO2 to decrease from 0.62M to 0.28 M? 2NO2(g) 2 NO(g) + O2(g)

2168

What is the reaction that occurring between fas and potassium dichromate?

787

What is wave number?

635

Explain what is the chemical formula of detergent?

552

what are the standard methods for HPLC?

2250

For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

3500

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?

530

we shall use Dichloromethane in last stage of API.

2628

4.0 liters of oxygen are mixed with 8.0 liters of nitrogen. Identify the solute and solvent in this mixture:

600

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