Question

on is the process in which dry ice
to form carbon dioxide.
HN
S KABRA TIME 40 Min
STD 9. Matter in our surroundings - 2
MA
Q.1.Answer the following
1. What is the name of the process due to which dry ice changes into carbon dioxide gas.
2. Convert the temperature 343K to the Celsius scale.
3. Arrange the following substances in increasing order of force of attraction between their particles -
Water, Sugar, Oxygen
Q.2. Answer in short (any 3)
1. A sample of water was found to boil at 102°C at normal temperature & pressure. Is the water pure?
Will this water freeze at 0°C
2. What are the two ways in which the physical state of matter can be changed.
3. Why does one feel cold after a hot bath?
4. Draw a neat labelled diagram to show the experiment of melting of ice to water (Latent heat of Fusi
Blinde
Freezing.​

Answer 1

freezinghxjidfjghifhu

Answer 2

Answer:

Ans1 the process is known as sublimation

Ans2 343-270=73C

ans3 sugar water oxygen

Explanation:

part 2

ans1 the water is pure yes it will freeze

ans2 applying force and pressure

or by reacting with chemicals

ans3 after taking bath one should feel cool because the hot water droplets come contact with surface and evaporation occur and produce cooling effect