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

why we can use only 4 and 7 and 9 buffers in pH calibration

1 5446

How to do regeneration of Metacarb Pb plus column?

2615

we calibrate HPLC once in 6 months while iam doing calibration i came to know that calibration was failed. then how can i justify that the samples analyzed on the system during this 6 months was wright? how can i forward in to the next step for those batches?

5 12965

What is the solvent/material used to balance spirit level in analytical balance?

Glenmark, MMC Health Care,

5 13921

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 6411

why do we use around only 60 mg of K2cr2o7 in the UV calibration -control of absorbance test?

Reddy Labs,

3 14553

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 4497

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 7851

Can any one tell what is RECALL OF PROCEDURES is

Macleods,

1 3703

what is the difference between capillary and glass column in GC

1 8300

how to do heavy metal test for colour sample?

Cipla,

1 5114

differance between L1 and L7 columns

Everest,

5 25885

what is basc principle of the HPLC,IR,UV AND GC? what is difference between diffusion spectra and transmision spectra in IR?

Cadila, Dr Reddys, GICC, Mylan, Sygene, Torrent Pharma, Zydus Cadila,

1 21485

plz tall me that any pharmacopeia and guideline is par meted to use 1.68,4.01,7.00,9.00,12.45 buffer for ph meter calibration

Torrent Pharma,

2 5076

what is mean by 21 cfr

1 6837

Un-Answered Questions { Chemistry }

Actinium is a radioactive element. How is its radioactivity utilized in various practical applications or fields?

695

Protactinium is part of the actinide series. Discuss the significance of this series and its implications for nuclear chemistry.

791

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?

3228

for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

6151

Tell me about analytical method validation in QC

6241

Assuming that the density of the solution is the same as the density of water (density of water=1.000g/ml), calculate the mass of water for both reactions using: mass of water = Volume of water Density of water. Mass of water =

2595

Define an isomer?

1071

Explain acid gas?

1103

what is the disso medium for tropsiun chloride

2315

Give lewis dot structure for HBrO4?

9849

How is arsenic produced?

1100

Acid value definition is number milligrams of koh required to nuetralise the acid present in one gram oil & fats but why not use naoh for nuetralisation?

1205

Describe the historical significance of Protactinium's discovery and its naming.

709

Why potassium dichromate is used in calibration of uv?

2042

naphtha and hexane mixture can be used a fuel or not

2499

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