Chemistry
Give reasons for the following:
Solid carbon dioxide is used for the refrigeration of food.
Related Questions
Give reasons for the following:
An excess of carbon dioxide increases the temperature of the earth.
Give reasons for the following:
Soda-acid and foam-type of fire extinguishers are not used for extinguishing electrical fires.
(a) Name the chemicals required for the preparation of carbon dioxide in the laboratory.
(b) Write the balanced chemical equation for the preparation of CO2 in the laboratory.
(c) How will you collect CO2 gas in the laboratory?
(d) Draw a labelled diagram for the preparation of CO2 in the laboratory.
(e) Why is sulphuric acid not used for the preparation of carbon dioxide in the laboratory?
(f) Give a chemical test for carbon dioxide.
What is a fire extinguisher? What is the substance used in the modern type of fire extinguishers? How is it an improvement over the soda-acid and foam-type fire extinguishers?