How can the interconversion of states of matter be achieved?

Carbon dioxide was taken in an enclosed cylinder and compressed by applying pressure.
$(a)$ Which state of matter will we obtain after completion of the process?
$(b)$ Name and define this process.
$(c)$ What is the common name of the product obtained in the above process?

Define the latent heat of fusion. Why does the temperature remain constant during the melting of ice?

Explain why the temperature remains constant during the process of sublimation.

$(a)$ Enumerate the changes that take place in a liquid during evaporation.
$(b)$ How is the rate of evaporation affected by changes in the following? Justify your answer.
$(i)$ Temperature
$(ii)$ Wind speed
$(iii)$ Humidity

Once Ram's mother Sunita went to her friend's home along with Ram. On visiting there,Ram saw a wet khus-khus screen hung at the door of the room. He asked his mother why they had hung this screen,and his mother answered that it keeps the room cool. Ram was satisfied and smiled.
$(a)$ According to you,what qualities are possessed by Ram?
$(b)$ How does a wet khus-khus screen hung at the door keep the room cool?