Which of the following is correct regarding the properties and uses of carbon dioxide gas?
1
Carbon dioxide is a colourless, odourless, and almost water insoluble gas.
2
Carbon dioxide is a poisonous gas and increase in its atmospheric content has led to the problem of greenhouse effect
3
Carbon dioxide is used as a fire-extinguisher and to manufacture urea.
4
Carbon atom in the carbon dioxide molecule undergoes sp hybridization and carbon dioxide acts as a good reducing agent.
5
Question Not Attempted