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

Why pH Range has been fixed as 0 to 14 ?

Akums, Cipla, Matrix, SUN,

1 7477

How you develop a method in HPLC?

CU, Perrigo, Wockhardt,

2616

what can saybolt viscometer do?

1 8396

why using buffers in hplc inteed of water

5 14465

How long we can use hygroscopic reference standard in terms of water absorb.I mean in line with respective monograph's specification or more than that?

1 3137

Why we use methy Ethyl Propylparabine For HPLC Calibration

1 5526

What is use of LOD and LOQ in validtion and give range and in calculation why we use 3.3* LOD here why we use 3.3

Dr Reddys, IPCA, Reddy Labs,

2 6855

In specificity what parametrs are consider why that parametrs

2 7000

ash or residue in that what will be there.

3 6664

How can we determine Moisture content of HI?

Cipla, Reddy Labs,

1 3442

What is difference between oos

Gennex,

7 28192

what is the differance between Analytical and semi micro balance?

2 13831

In the method validation proceedure,lod & loq calculation we use the formulae for LOD=3.3*SD/slope and for LOQ=10*SD/slope,why we use 3.3 & 10 in the formulae?

1 11033

In HPLC Chromatographic separation Resolution equation is Rs = 1.18 (tR2 –tR1)/wh1+Wh2, Where, tR2 and tR1 is run time of eluent ratios of the distances from the point of application to the centers of the spots and the distance travelled by the solvent front from the point of application (retardation factor), and Wh1and Wh2 , is peak width of at half height. What is 1.18 ?

1 7322

what is mean by theoritical plates(not formula) ?

Micro Labs,

4 14823

Un-Answered Questions { Chemistry }

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?

4073

why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

2787

What are the primary considerations in extractables and Leachables ?

2276

explain sour gas?

1057

What is an indicator electrode?

1293

Write the chemical formula for epsom salts?

1083

Give an example of a polysaccharide?

1183

Define an electrochemical corrosion. What are the types of electrochemical corrosion? : Electrochemistry Corrosion

980

hi, i want last 10 years ongc exam recruitment papers for subject in chemistry ,genaralknowladge.

2803

How many moles of sodium hydrogen phosphate can be prepared from 3 mol of sodium hydroxide and phosphoric acid?

2394

What is the main difference between ODS1 and ODS2 Hplc column.

5219

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)

2597

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

3694

Explain the term aliquot and diluent?

1336

In which situation we require to prepare the standard solution from sample in Related substance method?

777

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