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 5307

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

3 9147

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

GVK,

2 18784

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

GSK GlaxoSmithKline,

3994

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,

6180

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)

2554

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

MahaGenco,

2434

. 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)

6588

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 9391

how PH an important role in HPLC separation

3 16821

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

Laurus,

2 19954

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

Archimedes,

2 12057

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

6 13860

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

3 9916

Un-Answered Questions { Chemistry }

What is weak acid?

910

How would you decide dissolution medium for NCE compound of class I drug

2199

Why to use propyl paraben in HPLC gradient calibration

7321

. 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)

6588

Protactinium-233 can be bred from Thorium-232. Describe the process of breeding Protactinium-233 and its significance for nuclear fuel production.

565

4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations

2663

what is diffrence between specificity and selecivity?

715

Do all explosions produce carbon dioxide or carbon monoxide?

1059

2263

What is the limitation of cod?

1060

Principle of single pan analytical balance

5089

Why do we use vaccum in Loss on drying test?

1631

How to set analyticl specification for combination products?

689

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

510

why we shrink our body during cold

1725

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