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 5420

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

3 9299

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

GVK,

2 18901

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

GSK GlaxoSmithKline,

4071

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,

6249

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)

2597

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

MahaGenco,

2486

. 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)

6644

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

2920

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 9497

how PH an important role in HPLC separation

3 17011

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

Laurus,

2 20066

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

Archimedes,

2 12216

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

6 14113

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

3 10113

Un-Answered Questions { Chemistry }

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

1404

how many types of balance calibration test?

2300

Which of the above conductivity measured during conductometric titration?

1069

Describe the historical significance of Protactinium's discovery and its naming.

650

What is the number of protons in an atom?

1056

can you email me because I have a report and I need you to answer these questions if you would like to if not I completely under stand.

2129

What is electrode potential? : Electrochemistry Corrosion

1164

what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

1972

in dissolution if one bowl got 70 percent 2nd bowl got 80 percent and 3rd bowl got 90 percent then how proceed?

752

what is definition of validation? which components are followed give detail?

2372

Differentiate between modern periodic table and mendeleevs table?

1167

what is the disso medium for tropsiun chloride

2260

Why is acetic acid added?

1165

What is a difference between potency and purity?

1221

If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

2302

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