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 does the result variation in hplc and gc with same sample ?

Matrix,

4 12500

How will you select mobile phase in HPLC Method Development

4 18305

how to regulate noise in hplc ?

2 9852

why results are variation in same samples analysis in gc and hplc ?

2 9373

why base line not start from zoro in GC Chromatograme.

Merck,

1 8682

What is cleaning validation of rinse and swabe and its limit with caculation formula.

5 12302

In order to avoid the pyridine catalyst use in many synthesis which is harmfull to environment, which catalyst can be used....?

Hetero, Lupin, Reddy Labs,

2401

what is the purpose of using cyclhexane in synthesis?

1 4264

what is the difference between c-8 and c-18 column

7 24287

why deutiriated chloroform used in NMR for sample prepration. what reaction takes place.give reasons

1 7690

how do u optimise hplc method

1 7800

name any insolvent compound?

1 5417

How to calculate %w/w and %v/v of a component(or solvent)by NMR

ACME, Vimta Labs,

1 9223

How to prepare 10% HCl from 36.5% HCl solution.

Dr Reddys,

5 123464

How to prepare 50 ppm ammonia solution form 25% ammonia solution?

Cadila, IIT,

8 30834

Un-Answered Questions { Chemistry }

we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

1873

Loss of linearity in tkn analysis, possible reasons?

1322

What is the unit of ph?

1031

What is viscosity-coefficient of a liquid?

1419

Mention a few advantages of photoelectric colorimetric determination.

1383

What is the organic structure of cetearyl alcohol?

1120

how much time require for day to prepare the ongc exam for evarage student?

3035

What are some common isotopes of Actinium, and how do they differ in terms of stability and uses?

685

When a glass rod is heated gradually and suddenly dipped in cold water, it cracks. What is the reason?? When a cool glass rod is suddenly heated, it cracks. Why?

1034

Explain what are enzymes?

1165

Write the significance of electrochemical series? : Electrochemistry Corrosion

991

Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

2609

What is the difference between the photochemical reaction and photo-dynamic reaction?

2568

What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

1901

In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

3486

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