Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

General Chemistry (478)
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Chemistry Interview Questions

Questions Answers Views Company eMail

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1768

Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

1819

For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

1907

In Assy by potentio metry titration method how select MET U ,DET U, SET U,

2171

in sampling of raw material which side is pasted sampled labels

1838

why holium oxide prepared in 10% HCLO4 SOLUTION

1462

Why 162 mg NaOH used for 1N volumetric solution in 150 ml water then 54.5 ml diluted with 1000 ml

1918

What is the importance of rrf in rs by HPLC?

1 3224

Barc in chemistry

1354

Arrange by acidic values : phenol, nitrotolouene and o-cresol?

Flipkart, Wipro,

1083

What is the resulting solution when benzene and toluene are mixed ?

Flipkart, Wipro,

1015

Which Formula Forms A Link Between The Thermodynamics And Electro Chemistry?

Godrej,

1140

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

1405

Why does a freely suspended magnetic needle always point North and South ?

1 1499

Explain the ANS Isotope?

1 1583

Un-Answered Questions { Chemistry }

Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

1819

What is the difference between cracking, pyrolysis, destructive distillation, hydroforming, carbonization and dry distillation?

9806

What if impurity area in control sample coming more as compared to LOQ level of impurity ?

1601

Which Formula Forms A Link Between The Thermodynamics And Electro Chemistry?

1140

2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

2224

Ph meter can show more than 14 ph reading? Why ph range in between 1 to 14 only?

741

what is NIR wave length

1433

Why do different polymers have different properties? : Polymer Chemistry

1208

For water content determination, if the material is insoluble in methnaol and ethylene glycol mono methyl ether, what other diluent can we use.

2001

What are the products formed after cod analysis?

1333

Head-to-tail polymerization of propylene is observed with the [cp2zr(r)]+ catalyst. Explain this result on the basis of molecular-level interactions. : Polymer Chemistry

1015

Why is starch indicator added towards the end point?

988

How to fix the sample conc. in Related substances test by HPLC?

1096

what happens to the unit particles of a solute when it dissolves on a liquid?

2191

What are the electrodes used in the measurement of ph for the determination of pka?

1292

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