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

IISER,

4 8706

PLease give me the list of normal phase hplc column

Micro Labs,

3 7423

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

4252

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

2309

What is the principle of Particle size analysis and zeta potential

2650

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

Hetero,

2 5198

What is the difference between specified impurity and Identified impurity

Glenmark,

3 16217

What is the difference between specified impurity and Identified impurity

Merchant Navy,

1 6080

how do you established the RRF for unknown impurity

Square Pharma,

6 13162

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 10135

What is the temperature

Reddy Labs,

1 8135

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

Celon Labs, Laurus,

2 11397

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

DRL, Laurus,

3699

Which column is more polar, C8 or C18?

Cipla, Glenmark, Laurus, Torrent Power,

6 30405

what is the difference between heavy metals and sulphated ash

Aurobindo,

2 18129

Un-Answered Questions { Chemistry }

As per ICH related substances stability trend limit from initial to shelf life

3261

is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

2180

What is fluidity of a liquid?

1093

why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

2788

Tell me the common name of the molecule dihydrogen dioxide?

1045

What is wave length?

988

Explain the process of protactinium-uranium fractionation and its implications for understanding geological and geochemical processes.

712

Explain how do you extract ephedrine from a mineral block?

1017

Describe the role of Protactinium in neutron sources and its significance for research in nuclear physics.

581

What is the accrptance criteria in RSD for RS method precision on basis of impurity percentages?

834

Why we check moisture,ash & AIA in product

1895

which batch require to use for analytical method validation?

814

What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

1902

Tell me how many milliliters of water would you add to 100 milliliters of a 0.350 molar solution to make a 0.100 molar solution?

931

How to choose the which salt is suitable for mobilephase

3262

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