a) Try the following questions:
Q1. What are the conditions for something to be called matter?
Q2. Why do gases neither have fixed volume nor fixed shape?
Q3. How does the smell of food being cooked in the kitchen reaches us even from a considerable distance?
Q4. Explain why does diffusion occurs more quickly in gases than in liquids?
b) Try the following questions:
Q1. What is the common name of solid carbon dioxide?
Q2. What is meant by saying that the latent heat of ice is 3.34 × 105 J/kg?
Q3. State two conditions necessary to liquefy a gas.
Q4. Why does temperature remain constant during the boiling of water even though heat is being supplied continuously?
Q5. Why does desert cooler cool better on a hot, dry day?
Q6. Why does the naphthalene balls kept in stored clothes in our home disappear over a period of time?
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