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 we use x terra columns at higher ph ?

Hetero,

2 11556

what is dead time in hplc?

Orchid,

3 19695

what is the difference between melting range & melting point? Which is more significant?

5 31213

what is the significant of pH in HPlc?

Orchid,

5 15672

what is weight veriation in pharma industry ? plz explain me

1 3809

How to now that my acid is contact with base or base is contact with acid in drugs, is there any techniq to identify the formation of salt(drug)

Reddy Labs,

3 7732

what is least count of a balance? How we find out this? Any formula for least count of Analytical balance?

Acme Formulation, Analytical Solutions, Dr Reddys, Reddy Labs,

13 99559

Explain about Low pressure gradient and High Pressure gradient systems in HPLC?

Mylan, Orchid, Roshanico,

4 30055

what is protocol ? plz Explain me

5 13114

How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

JBCPL,

3266

HPLC Calibration was done in Reverse Phase, but not in normal phase why explain?

Cipla, Orchid,

11 34026

why silica absorb in mix bed resins in D M plant.

NTPC,

8 23078

i m a m sc biotech student, a chemist in a pvt company for 3 years, i want to change my career. which will be good for me again m sc chemistry in distance, then phd ? or prepare for railway or banking jobs. plz help.i prefer a govt. job ?

1 4192

what are the standard methods for HPLC?

Orchid,

2834

What is the procedure for investigation of an OOS (Out of specification) results?

Biocon, Dr Reddys, Reddy Labs,

4 26544

Un-Answered Questions { Chemistry }

How to establish relative response factor for hplc. Why it is required?

1272

what is induction on electrical insulators

2366

why multimedia dissolution require to do?

869

WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

2672

Which is the highly polar and highly non polar column in HPLC?

2352

Which one of the following is not aromatic?

1455

What is chemical oxygen demand?

1119

in which situation require to change rs specification?

800

Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

1762

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1814

how you start RS method development when for new product?

780

In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

2019

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

1702

how to calibrate hplc & gc

4565

effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?

1012

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