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

which is the most abundant element in the universe?

2 5301

How we fix the validity period of a Normal solution and re-standardization due date

3 9145

How do you verify the primary,secondary and tertiary amines by IR-Spectroscopy.

GVK,

2 18783

what is the extinction coefficient for Indomethacin or at 319nm wave length.

GSK GlaxoSmithKline,

3993

Sr-90, a radioactive isotope, is a major product of an atomic bomb explosion. It has a half life of 28.1 year. Calculate the first order rate constant for this nuclear decay and the fraction of 90Sr that remains after 10 half lives?

Wipro,

6175

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)

2551

4 Identify the substance oxidized, reduced, oxidizing agent and reducing agent for the following reactions

MahaGenco,

2433

. Given that 2Hg2+ (aq) + 2 e- Hg22+(aq) E0 =0.92V Hg22+ (aq) + 2 e- 2Hg(l) E0 =0.85V Calculate standard free energy change and K for the following process at 25oC Hg22+(aq) Hg2+ (aq) + Hg(l)

6583

Write the each half cell reaction and also net cell reaction for a cell

2864

Balance the following redox equations by ion electron method. In basic medium (i) CN- + MnO4- CNO- + MnO2 In Acidic medium (ii) ClO3- + Cl- Cl2 + ClO2

Chemical, Wipro,

1 9386

how PH an important role in HPLC separation

3 16817

HOw do i calculate the number of theoretical plate on a HPLC chromatography

Laurus,

2 19951

How we can analysed unknown sample by hplc....

Archimedes,

2 12053

Why the same type of columns showing different RT for a single product?

6 13854

Shall i use a same hplc column for two different products.?

3 9908

Un-Answered Questions { Chemistry }

What is Band broading effect explain

1828

how to develop the icp ms method? Application of icp ms?

748

how you confirm the assay method?

726

Why use only methanol,used determinationof moisture content not use other solvents

1362

when are the result of sbi clerical come

2360

Name the 4 physical states of matter?

992

1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.

2832

How is hardness of water caused?

1073

In what ways can Actinium be used in conjunction with other elements or compounds to create new materials or compounds with specific properties?

573

How a balanced equation can be used to find the mass or volume of an unknown quantity in a stoichiometry?

2482

If inhouse hplc related substance method is completly diffrent from Usp for finished proďuct with diffrent impurities then how require to prove method equivalecy?

734

what is mean by dissolution biowaiver study?

855

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

751

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

2852

How hydrate is forming along with API?

2265

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