4 DECEMBER 2020 CURRENT AFFAIRS QUIZ

Helium

All of these

Oxygen

Nitrogen

prevent analyte condensation within the column

control elution of the different analytes

reduce band broadening to get sharper peaks

all of these

all of the sample in the injector has been added to the column

the sample is spread evenly along the column

the sample is homogenously spread along the column

the sample is concentrated at the start of the column

it is inert

all of above

it doubles up as a party gas for balloons and funny voices

it has a lower viscosity

splitting the sample into smaller portions to inject sequentially

splitting off some of the sample so that it does not enter the column

None of these

splitting the sample into smaller portions to inject at the same time through parallel ports

Electrical conductivity

NMR

Flame ionisation

Infrared spectroscopy

Gas chromatography is used to analyse gases

Gas chromatography is used to analyse solids

Gas chromatography is used to analyse gases, solutions and solids

All of these

prevent backflush of the injected solution

All of these

retain contaminants and prevent them from reaching the column

retain the sample and release it gradually to the column

Electron-capture detector

Infra-red detector

All of these

Thermal conductivity

Field ionisation detector

Electron capture detector

Thermal conductivity detector

All of these