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 5547

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

3 9489

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

GVK,

2 19023

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

GSK GlaxoSmithKline,

4129

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,

6321

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)

2647

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

MahaGenco,

2537

. 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)

6709

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

2976

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 9618

how PH an important role in HPLC separation

3 17179

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

Laurus,

2 20181

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

Archimedes,

2 12365

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

6 14328

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

3 10271

Un-Answered Questions { Chemistry }

Explain the dipole moment direction for methanol?

1173

Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

2894

Describe the role of Protactinium in neutron sources and its significance for research in nuclear physics.

622

USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

2078

Atactic polypropylene is always produced with the [cp2zr(r)]+ catalyst. Explain this on the basis of molecular-level interactions. : Polymer Chemistry

1152

What is buffer?

1160

if rsd failed then what require to do?

886

Hi sir if any product monograph not given known impurities (may be 5 impurities) specifications then how we require to proceed for inhouse formulation?

759

for which product require to do content uniformity? what is limit of cu?

883

which question ask me in grasim in inerview?

2288

What is protein - according to chemistry?

1241

State lambert’s law.

1280

What are the methods used to control the corrosion? : Electrochemistry Corrosion

1070

How tripod is used?

1228

Is it nessesary all multimedia dissolution require descriminatory?

865

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