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Chemistry Interview Questions
Questions Answers Views Company eMail

Why is maximum pH14. Why does it range from 0-14 only?

IISER,

4 7223

PLease give me the list of normal phase hplc column

Micro Labs,

3 6231

Why purity angle should be less than purity threshold in peak purity

 3704

Suppose u have combipack product and u get 2 or more peaks which are other than there placebo then what we can do

 1905

What is the principle of Particle size analysis and zeta potential

 2034

suppose u got 2 or more maxima in the uv spectrophotometer then what u can do

Hetero,

2 4257

What is the difference between specified impurity and Identified impurity

Glenmark,

3 14763

What is the difference between specified impurity and Identified impurity

Merchant Navy,

1 5078

how do you established the RRF for unknown impurity

Square Pharma,

6 11332

I want analyze my compound at 325 nm so which standard shall i use to calibrate my HPLC system? How i can assure my hplc detector is suitable or not?

AMRI,

3 8731

What is the temperature

Reddy Labs,

1 7392

How we will choose pH of a mobile phase if analyte pKa value is 4

Celon Labs, Laurus,

2 10309

what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

DRL, Laurus,

3102

Which column is more polar, C8 or C18?

Cipla, Glenmark, Laurus, Torrent Power,

6 27843

what is the difference between heavy metals and sulphated ash

Aurobindo,

2 16719

Un-Answered Questions { Chemistry }

if you get peak in blank then what require to do?

479

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?

2201

How doing qbd practically?

424

why we need to synthesize impurities of midazolam

1774

Define a hydrogen bond?

625




How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1978

If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

1751

Explain acid gas?

587

What are some of the polymers that you encounter every day? Describe their physical properties. : Polymer Chemistry

684

Define alum?

653

can you email me because I have a report and I need you to answer these questions if you would like to if not I completely under stand.

1706

Sir, please give me previous year question paper for RRB for the post CHEMICAL AND METALLOGICAL ASSISTANT.

2283

Mention the formula to calculate ph of a solution?

796

why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

1775

Colorimtry

1168

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