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

what are the primary standards of redox titrations?Name any two.

Laurus,

2 9238

In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

Laurus,

2221

mode of absorption in alimentary canal?

Sun Pharma,

2391

why we calibrate ph meter and balance daily.....but hplc and uv requires quaterly?

Apotex, UPL,

5 21475

why we are use metthanol variously in kfr?why don't use other solutions?

4 12852

when we use capillary and packed columns in gc

Rakshit Drugs,

4 10650

what is the difference between IR and FTIR instrument analysis

2 13027

how can give the expiry period and restadardisation of volumetric solution

Meenaxy Pharma, SRF,

2596

What are the different types of columns used in HPLC

Wockhardt,

3 13155

In HPLC when we use Isocratic method, Gradient method in hplc?

Pharmaceutical,

8 22481

Any molecule is filing for ANDA purpose, what are the dissolution requirements / specifications needed ?

IPCA,

1 6356

What is Endcapped Hplc column

2 9667

Why we more noise in PDA detector compared to UV detector?

Aurobindo,

1 11641

if the purity is 99.9%,is need to do assay?

Reddy Labs,

3 15163

How to do acidity alkanity test ofsodium chloride

1 4456

Un-Answered Questions { Chemistry }

please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

1631

what is %labelled amount in content uniformity of dosage unit and its calculation?

5236

In rs method development when we are going area normalization method to dilute standard method?

1524

What is mineral water?

1078

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

Why is ammonia-ammonium chloride buffer added?

1174

Cholesterol is a compound suspected of causing hardening of the arteries. The formula of cholesterol is C27H46O. a. A sample of cholesterol is isolated from the arterial lining of a 60-year-old American male. What is the formula of this compound? b. Cholesterol is extracted from a chicken’s egg. What is the formula of this compound?

3178

Which of the above conductivity measured during conductometric titration?

1074

why does used dry caffien in HPLC calibration?

2032

(CH2)n + nO2. ---->Co2 + nH2O + energy what is this mean with details

1628

Explain the dipole moment direction for methanol?

1121

Why do you require laboratory temperature for viscosity determination?

1147

How is measurement of ph made?

1056

Explain the process of obtaining Protactinium from its primary sources and its purification methods.

663

sir, what does happen ............? naphthal+benzene(or)toluee........> ?

2175

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