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Chemistry Interview Questions
Questions Answers Views Company eMail

in HPLC injection volume is increase ,R.T will increase ?

Claris Lifesciences,

5 9976

Distinguish b/w CH3CHO and CH3COCH3 on the basis of IR?

1 6065

How to caluculate the RRF and correction factor in hplc

Alkem Labs, Aurobindo, Rakshit Drugs, SDLPL,

1 14379

What is the optimum period of storage of indicators?

Orchid Chemicals and Pharmaceuticals,

1 4391

what is the most common FT-IR source used for the MID&Near IR regions?

Dr Reddys, Piramal Enterprises,

1 5391

How much carbon loading in nomalphase columns?

5 7839

Chromatographic Purity is a Qualitative analysis

Shasun Chemicals,

2 5415

what is the limit for KF Factor ,we take factor using water we will found factor between 6 to 7 ,while on KF Reagent bottle mentioned 5 mg/ml water content.if we not use dried methanol it is effect on factor.

Atul,

1 2801

What is the basicity/acidity of na2co3

DELL, DSP,

1 9456

Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

2725

Why we use methanol as solvent in kf standardisation. Why not other solvent?

Caplin Point, Epione Labs, Hetero,

2 6954

What is deference between the working standard and reference standard?

Gland Chemicals, Meghmani Organics,

1 2939

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?

Meghmani Organics,

1898

What is use of acetonitrile compare to methanol in RP-HPLC Method development?

Meghmani Organics,

1994

When we get Moisture content by KF higher than by LOD, what does this indicate?

Meghmani Organics,

1 3314


Un-Answered Questions { Chemistry }

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

6070


[3/28, 20:52] Manoj P Venkatpurwar: how many impurities require to inject in assay specificity that how we can find out? and in Rs also how?

795


What is the unit of ph?

1029


What are the factors which affect corrosion? : Electrochemistry Corrosion

924


composition of german silver

2336


Give the IUPAC name for [Co(NH3)5Cl] SO4

1094


analytical method validation require to with respect to release specification or shelf life specification?

793


How is the viscosity of liquid related to its mobility?

1437


acceptance criteria for lod & loq by standard deviation of response and slope??

2591


What is the Difference Between 3M KCL and 4M KCL, WHy We are Filling 3M KCL In electrode Instead of 4M KCL

2541


What is viscosity-coefficient of a liquid?

1417


Explain what are enzymes?

1163


. Given that 2Hg2+ (aq) + 2 e- Hg22+(aq) E0 =0.92V Hg22+ (aq) + 2 e- 2Hg(l) E0 =0.85V Calculate standard free energy change and K for the following process at 25oC Hg22+(aq) Hg2+ (aq) + Hg(l)

6644


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

1015


Define hydra?

1067