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

In acid base titration, after complet consumption of HCl by NaOH, addition of next drop of NaOH will give pink colour with phenolpthalein indicator. Why this pink colour appear? Why not blue, black, green or anything elese?

3 11532

Why we are using only KBr in IR spectrometer why not KCl

Dr Reddys,

10 35733

WHAT IS ORGANIC CHEMISTY ? GIVE ME ANSWER AS AN M.SC LEVEL

Zydus Cadila,

9 14278

why potassium dicromate use in calibration of UV VIIBLE SPECTROCOPY ?

3 8787

how to pepare 6.8 pH phosphate buffer

10 83065

what is pK & pKa value

3 13854

what is range of Vivible UV ? What is UV& Vivible spctroscopy use for ?

6 12799

What r the limitatoins of uv visible spectroscopy ? Why Water use in blank standard for uv visible spectroscopy ?

Cipla, Reddy Labs,

4 41504

What is difference between Primary and secodary reference standard?

2 19633

Give the IUPAC name. i) [Co(NH3)5SO4]Cl ii) [Co(NH3)5Cl] SO4 iii) [CoCl.CN.NO2.(NH3)3]

3 44183

Give the formula of the following compound. i) Chloropentaamminecobalt(III) chloride ii) tris(ethylenediamine)cobalt(III)chloride iii) tetraamminesulphatocobalt(III)nitrate

1 6669

Discuss role of coordination chemistry in: (a) Biological system (b) Analytical chemistry (c) Medicinal chemistry

3297

Out of (CH3)3C- and (CH3)2CH- carboanion, which is more stable and why?

2 10574

WHAT IS UNIT OF ABSORBANCE AREA IN HPLC OR UV DETECTER

8 27927

why phenolpthalin gives pink colour when we titrate aganist sodium hydroxcide & phenolpthalin gives colourless titrate aganist hydrochlric acid which is un burate

1 5496

Un-Answered Questions { Chemistry }

why do hard water never produce foam when a soap is dissolved?

1040

how pda detector works over uv?

742

How we can identify process related and degradation impurity in single method with short period?

817

FDA MHRA

2597

Which one of the following is not aromatic?

1406

Protactinium-231 decays to Uranium-235. How is this decay used in radiometric dating and the determination of geological ages?

573

What is the limitation of cod?

1123

what does 50 denote in dowex 50 ????

2570

I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

3540

Define a triglyceride?

1013

What is specific conductivity?

1098

WHAT IS THE USE OF STARTER ?????????

2425

Find out how to make artifacts the maxwell boltzmann theory of gases . ps. I don't speak English that well

1578

Define a hydrogen bond?

1034

How much is the standard area for glc analysis

2286

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