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Chemistry Interview Questions
Questions Answers Views Company eMail

Difference between related substances & impurities

Biocon,

2 18498

Polarized meter calibration, 1. Method name? 2. Which solution use? 3.why?

1 3867

Basic principle of ESI?

Cipla, GVK,

2214

What is the meaning of Base deactivated vials

Sun Pharma,

1 3736

What is definition of RRT and what is the difference between RT and RRT in HPLC

2 10801

What is the definition of RRF

2 6937

In GC Why does retention time decrease when temperature increases? Also how does a change in temperature effect selectivity?

Gland Pharma,

1 4092

why we use 0.1% acetone in gradient calibration of HPLC?

Cipla, Dr Reddys, FDC,

3 14032

What is difference between assay by Hplc and uv

Aizant, Fredun Pharmaceuticals, Hetero, Marksans Pharma,

2 10640

why we use actone for Gpv test in hplc calibration

1 10395

How to standardization of 1N H2SO4?

GNFC, Macleods,

1 8157

Why ammonia is used as buffer solution in estimation of copper by EDTA method

1929

how does h2so4 prevent oxidation of mohr salt before it is titrated?

1 3281

what are the reasons to get the low transmittansE in FTIR

Dr Reddys,

2 4441

In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.

1 2907


Un-Answered Questions { Chemistry }

Tell me something about Vitamin A test method by HPLC

2728


A polymer's structure influences its physical properties. Describe two structural variations that are possible for polypropylene but not for polyethylene. : Polymer Chemistry

1151


why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

2366


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

800


What is a potentiometer titration?

1251


what is stero electronic factor.2 what is steric control factor and what is product control factor

2176


if you have given a blank water how you analyse by general analytical techniques?

2088


Why sodium hydroxide used for maintain pH of phosphate buffer

2489


why athanol-water mixtuere have maximum viscocity in wt% 40?

1781


CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

1264


Why a1% value is used for some product ? What is the criteria for selection a1% value ?

2401


Basic principle of ESI?

2214


What is ciprofloxacin hcl?

1106


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

1654


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

3193