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Chemistry Interview Questions
Questions Answers Views Company eMail

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

Chola, Cipla,

1 5340

How to do regeneration of Metacarb Pb plus column?

2580

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 12776

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

Glenmark, MMC Health Care,

5 13726

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 6330

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

Reddy Labs,

3 14375

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 4416

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 7778

Can any one tell what is RECALL OF PROCEDURES is

Macleods,

1 3612

what is the difference between capillary and glass column in GC

1 8229

how to do heavy metal test for colour sample?

Cipla,

1 5030

differance between L1 and L7 columns

Everest,

5 25653

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 21413

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 4951

what is mean by 21 cfr

1 6771


Un-Answered Questions { Chemistry }

pls send me ongc privious entarnace exam papers

2280


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

2296


Q1. Why did you enter the field of chemistry? Q2. What has motivated you to take chemistry as your professional subject and have you motivated anyone towards your field?

2293


What is the min constitutes of haematite ore?

1073


Suppose we prepared pH buffer solution in lab.and calibrate against NIST solution, and same shall going to used upto 30 days. is it possible to stable pH and appearance? suggest?

1898


in stress study if your api not soluble in hcl naoh h2o2 then what require to do?

836


what you do when compound having dwel wavelength?

750


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

4266


What is an indicator electrode?

1291


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

2233


how to select short coloum and long coloumn for new molecule

2451


What do you mean by redox reaction? : Electrochemistry Corrosion

928


What is the nature of the bonding interaction between a metal and an olefin? : Polymer Chemistry

1019


what is biorelivent dissolution media?

807


what is mean by extactable and leachable study?

1170