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 salt thrown on the frozen road ?

2 5225

Why a hot day in Calcutta causes more discomfort than are equally hot day in Delhi ?

1 3331

When the heat rays from the sun area focused on a piece of black cloth by means of a lens, the cloth catches fire. Why ?

1 4119

Why cooling is produced when a wet ?khus khus? screen is hung on the doors and windows ?

1 9123

Why do we feel chilly in damp clothes ?

1 4085

In winter, on a cold morning, the cement feels colder to the foot than a carpet. Why ?

1 4177

While standing on railway platform and heating the whistle of an engine coming towards us , we hear the sound increasing; bit when the engine is receding from us it appears to fall why ?

1 3073

Why does a freely supended magnetic needle always point North and South ?

1 3704

Why is sometimes a succession of echoes heard ?

1 3788

Why is an echo not heard in a small room ?

3 10588

What are the soldiers in an army, while crossing a bridge ordered to go out of step?

1 3808

We see the sun before it rises above the horizon in the morning. Why?

Infosys,

1 6011

Why do eye-glasses become fogged, when the wearer comes form the cold outdoors into a warm room ?

2 4115

Why has every parachute a hole in the centre ?

1 3842

Why is a halo formed round the moon, when the sky is clear ?

1 3764

Un-Answered Questions { Chemistry }

What is mean by PDR?

895

In testing of Cement the formula for water requirement for setting time is as below- Water required for setting time = NC x 0.85 The question is that what is the logic of 0.85 in this formula??

2391

How doing qbd practically?

933

How to calculate coreletion coefficient

1663

how to prepare the 0.001M tio2

2341

how to mesure a relation of assay by HPLC and purity in results?

2291

how we change 0.1N KmNo4 solution to 0.01N KmNo4 solution.

1987

What is molar conductivity?

1012

why require the ph, buffer during hplc mobile phase?

836

Basic principle of ESI?

2109

what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

3629

What is the white precipitate produced at the end of point?

958

how require to fix the linearity and accuracy cincentration range?

1621

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1737

Why is ph increases suddenly after the equivalence point?

996

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