General
✓✗Advantage of Kelvin scale is that
- It is simple and commonly used
- All temperatures on this scale are positive
- It shows values in Celsius, Fahrenheit and Kelvin
- It is made as per SI unit of temperature
General
✓✗A process in which a liquid changes in to its gaseous state is called
- Vaporization
- Freezing
- Condensation
- Melting
General
✓✗Naphthalene balls disappear with time without leaving any solid because they
- sublime
- are eaten by insects
- change into a liquid
- react with air
General
✓✗Clothes take long to dry on a rainy day because
- Humidity is high
- Evaporation is low
- Both ‘a’ and ‘b’ are correct
- Clothes keep getting wet by rain
General
✓✗Kelvin is denoted by symbol
- C°
- K
- K°
- Ke
General
✓✗On applying pressure, the volume of a gas
- increases
- decreases (the gas gets compressed)
- remains the same
- first increases and then decreases
General
✓✗Rate of evaporation will increase under which of the following condition?
- High wind velocity
- High Humidity
- Low temperature
- Low surface area
General
✓✗Sublimation is conversion of
- Solid to liquid
- Liquid to gas
- Solid to gas
- Gas to liquid
General
✓✗Correct definition of “Latent heat of fusion” is -
- It is the quantity of heat in Celsius required to convert 1 gm of solid into liquid without any change in temperature
- It is the quantity of heat in Joules required to convert 1 Kg. of solid into liquid, without any change in temperature
- It is the quantity of heat in Joules required to convert 1 gm of solid into liquid without any change in temperature
- None of these is correct
General
✓✗Gases are matter because
- They have mass
- They have volume
- Both ‘a’ and ‘b’ are correct
- None of these