Explain the term ‘dry ice’. State its application.

Answer in Brief

Liquid carbon dioxide on sudden evaporation results in freezing and forming solid carbon dioxide called 'dry ice'.

Applications : Dry ice is used as a refrigerant for the preservation of foods as it freezes faster and lasts longer than ordinary ice.

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Chapter 9: Carbon & Its Compounds - Exercises

Chapter 9 Carbon & Its Compounds
Exercises | Q 16.1

Define the following:

Adsorption

FILL IN THE BLANK

.................... is the main gaseous compound of carbon.

Define catenation.

Why are carbon and its compounds used as fuels?

Draw the structures for ethanoic acid.

Differentiate between the two branches of chemistry – organic chemistry & inorganic chemistry with suitable examples.

Carbon dioxide occurs both in the free state and in the combined state.
State three methods how carbon dioxide is added to the atmosphere.

Select the appropeiate option of the following statement:

An allotrope of carbon obtained by burning kerosene oil in a limited supply of air.

Match the following.

There is more abundance of carbon on the earth.