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

What are the advantages of soapy detergents over soapless

2 15374

what is mass spectra ? why it is necessary ?

1 5953

difference between IR & NMR spectroscopy ?

9 41178

what v define from IR & NMR spectroscopy ?

Sun Pharma,

2 8392

if v use HELIUM & ARGON instead of NITROGEN as a mobile phase what happen in GC SYSTEM ?

Cipla, Reddy Labs,

5 13575

what is relationship between absorption and transmittance in u.v.?

Orchid,

11 33822

why we are using polystyrene film for calibration of I.R spectroscopy?

Abbott, Andhra Organics, Intas, Kemwel, Reddy Labs, RRR, Veritas, Zydus Cadila,

12 65658

why we cannot analysis below 200nm in u.v?

2 14544

what split ratio in gas chromatography.

Cipla, Glochem,

9 50250

what is the colour of protein casein? is it whitish or colourless?

Google,

1 4084

significane of detector wavelength accrucy in calibration of hplc

1 6815

signifcance of detector lenearity in calibration f hplc

3 9160

injection volume accruacy test i calibration of hplc

HLL,

3 20183

verification of wave number why you are use in IR calibration

2 8155

control of resolution in calibration of IR

3 9627

Un-Answered Questions { Chemistry }

Why we use potassium dichromate in control of absorbance in uv region and copper sulphate in control of absorbance in visible region?

2982

Identify problem faced when mass spectroscopy is used with HPLC system ?

1861

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

1098

What is the accepted microbial load in APIs as per USP.........?

2509

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

Explain the protein in chemistry?

1060

How many millilitre is equal to 1 litre and how many microliter is equal to litre?

1098

I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

3540

2321

describe the lewis dot structure of Mg2+?

11985

Why is mercuric chloride added?

1066

What is use of acetonitrile compare to methanol in RP-HPLC Method development?

1994

Principle of single pan analytical balance

5143

How to set analytical specification for combination products?

818

Explain how do you extract ephedrine from a mineral block?

1003

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