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 is maximum pH14. Why does it range from 0-14 only?

IISER,

4 8689

PLease give me the list of normal phase hplc column

Micro Labs,

3 7415

Why purity angle should be less than purity threshold in peak purity

4248

Suppose u have combipack product and u get 2 or more peaks which are other than there placebo then what we can do

2305

What is the principle of Particle size analysis and zeta potential

2646

suppose u got 2 or more maxima in the uv spectrophotometer then what u can do

Hetero,

2 5188

What is the difference between specified impurity and Identified impurity

Glenmark,

3 16204

What is the difference between specified impurity and Identified impurity

Merchant Navy,

1 6071

how do you established the RRF for unknown impurity

Square Pharma,

6 13130

I want analyze my compound at 325 nm so which standard shall i use to calibrate my HPLC system? How i can assure my hplc detector is suitable or not?

AMRI,

3 10121

What is the temperature

Reddy Labs,

1 8121

How we will choose pH of a mobile phase if analyte pKa value is 4

Celon Labs, Laurus,

2 11385

what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

DRL, Laurus,

3692

Which column is more polar, C8 or C18?

Cipla, Glenmark, Laurus, Torrent Power,

6 30386

what is the difference between heavy metals and sulphated ash

Aurobindo,

2 18113

Un-Answered Questions { Chemistry }

cefoperozone and sulbactam inj. hplc test method

2691

what is the relation between Total organic carbon and Chemical Oxygen demand?

2920

why salisylic acid not using now days for disdolution calibration?

772

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

1648

what is procedure of actual procedure for registration of drug?

2012

Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

2184

Actinium is part of the actinide series. Could you explain the significance of this series and its placement in the periodic table?

630

Explain the differences between organic and inorganic chemistry?

1113

before starting analytical method valodation what you checking? and how giving preference to start validation?

806

How can we find that which type hybridyzation in perticular compound like in CH4(hy is sp3)?

1102

What is importance of pH in the Heavy metal test and How it effect on the test results?

2283

Which wavelengths are visible to human eye?

1235

Protactinium-231 decays to Uranium-235. How is this decay used in radiometric dating and the determination of geological ages?

573

How to fix the sample conc. in Related substances test by HPLC?

1097

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

2233

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