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Chemistry Interview Questions
Questions Answers Views Company eMail

I have 1 gram of Diphenylamine and want to make a 10,000 or 1000 ppm solution in methanol. How do I make this?

Midas Technologies,

9 16494

Why forced degradation studies are performed in hplc method validation?

Apex,

6 25813

why base line not starts from zero in gc?

Aurobindo, FDC, Reddy Labs,

1 10288

how to regulate noise in HPLC?

Alkem Labs, Vimta Labs,

2 7761

What is split

Vimta Labs,

4 13311

What is the purpose & importance of using the polystyrene film in ir calibration?

Vimta Labs,

3 13914

Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

Reddy Labs, Vimta Labs,

2837

why 1.2%kcl solution is using in limit os straylight?and why this test used for uv calibration?

Graviti Pharmaceuticals, Reddy Labs, Vimta Labs,

1 8324

why 0.02% solution toluene &noHexane using in uv calibration?

Graviti Pharmaceuticals, Orbit Pharma, Ranbaxy, Vimta Labs,

1 8944

what is the peak purity concept?

Graviti Pharmaceuticals, Vimta Labs,

5 28878

why phepolphthalene giving pink color when we titrate against to NaOH Solution ,giving colrless titrating aginsiting with acids?

Graviti Pharmaceuticals, Vimta Labs,

2 5766

why ph electrode is storing in KCL solution?Why the pH max is 14.0?

Cadila, Vimta Labs,

5 20443

Why Na lamp is used in polarimeter?

Vimta Labs,

5 16211

why is salt andv ice used in liquifyiny SO2

Graviti Pharmaceuticals,

1 4936

What is pooled sample in Dissolution

Graviti Pharmaceuticals, Lupin,

2 22826


Un-Answered Questions { Chemistry }

Tell me how many significant figures are there in the number 0.0036?

1046


Protactinium-231 emits alpha particles. How can this property be utilized in radiation detectors or other scientific instruments?

639


Find out how to make artifacts the maxwell boltzmann theory of gases . ps. I don't speak English that well

1585


how can give the expiry period and restadardisation of volumetric solution

2602


What is delay volume?

1399


Which parameters require to do in tech transfer?

765


if peak get problamatic then what require to do?

807


What is iron ore consists of?

1052


Does domestic/household used kerosene oil which is available in blue color (In India) can change its color over the due course of time say 8-10 years if keeping in plastic bottle? If so, in which color it will be turned to change, yellow or transparent or any other color. Please provide me the reply with strong technical approach. Since it has been asked during an interview. Please reply fast. I will be thankful to you if anyone can provide the supporting journals/write-ups/reference to favour of response.

1432


How do we fix the sample concentaryion in hplc method development?

1149


What are the inorganic material eliminated in Sulphated Ash

3345


Why potassium dichromate is used in calibration of uv?

1993


What is the range of uv & vis lamp in spectrophotometer?

1115


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

835


chlorination of methane is possible and a mixture of products are obtained. Is flourination and Bromination of methane is possible?

2032