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

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

Claris Lifesciences,

5 10184

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

1 6191

How to caluculate the RRF and correction factor in hplc

Alkem Labs, Aurobindo, Rakshit Drugs, SDLPL,

1 14497

What is the optimum period of storage of indicators?

Orchid Chemicals and Pharmaceuticals,

1 4470

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

Dr Reddys, Piramal Enterprises,

1 5479

How much carbon loading in nomalphase columns?

5 8025

Chromatographic Purity is a Qualitative analysis

Shasun Chemicals,

2 5518

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 2875

What is the basicity/acidity of na2co3

DELL, DSP,

1 9536

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?

2789

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

Caplin Point, Epione Labs, Hetero,

2 7055

What is deference between the working standard and reference standard?

Gland Chemicals, Meghmani Organics,

1 3018

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,

1962

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

Meghmani Organics,

2050

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

Meghmani Organics,

1 3410

Un-Answered Questions { Chemistry }

What is the organic structure of cetearyl alcohol?

1181

What is electrode potential? : Electrochemistry Corrosion

1261

What is the requirement to give RFlow when using RID detector?

3142

How to do regeneration of Metacarb Pb plus column?

2616

WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

2633

composition of brass

1964

What is the number of protons in an atom?

1119

HI, I AM SUNIL BISHNOI.I AM PREPARING FOR ISHRO ASTRONOTES EXAM.PLEASE TELL ME ALL ABOUT THIS.

2532

When a glass rod is heated gradually and suddenly dipped in cold water, it cracks. What is the reason?? When a cool glass rod is suddenly heated, it cracks. Why?

1086

How to start the dissolution development for unknown tab?

1742

What is the difference between purge septum flow and column flow in gas chromatography?

2652

Explain why acetic has less conductivity than hcl?

1100

IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

2511

How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

4374

What are the constituents of cements?

1108

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