Related InterviewSolutions

• `25^(@)C` temperature is equal toA. `298.15K`B. `25K`C. `77^(@)F`D. `300K`
• Give reason for the following observations. (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume sitting several metres away.
• Why are gases highly compressible ?
• Name the state of matter that : (i) has definite mass, volume and shape. (ii) has no definite volume and shape (iii) has minimum inter particle attraction. (iv) has maximum inter particle attraction.
• Why are gases highly compressible while solids are almost incompressible ?
• Melting points of three solids X, Y and Z are 298 K, 314K and 398 K respectively. Arrange these in increasing order of inter particle forces of attraction.
• A cooler is quite effective on a hot and dry day. Explain.
• Give reasons for the following observations : The smell of hot sizziling food reaches you several metres away but to get the smell from cold food, you have to go close.
• In the following example state which factor is responsible for the change in rate of evaporation and is effective. `{:(i,"Colthes dry faster on a windy day",(ii),"Wet clothes dry faster on spreding them"),(iii,"Clothes dry faster in sun than in shade",(iv),"Clothes take a longer time to dry on a rainy day"):}`
• Can we regard high fever as matter ?