General
✓✗Plasma is used in making
- Neon lamps
- Fluorescent tubes
- Helium lamps
- All of these
General
✓✗Plasma can be made on earth by passing -
- Electricity through gas at low pressure
- Electricity through gas at high pressure
- Radiations through gas
- Plasma can not be made
General
✓✗270 K =
- 0°C
- -3°C
- 3°C
- 30°C
General
✓✗Gases are matter because
- They have mass
- They have volume
- Both ‘a’ and ‘b’ are correct
- None of these
General
✓✗Change of state from solid to liquid is known as
- Freezing
- Condensation
- Evaporation
- Melting
General
✓✗
The scientific name of particles which make up matter is
-
Atom
-
Molecule
-
Both ‘atom’ and ‘molecule’
-
Compound
General
✓✗We smell the food being cooked from a distance because
- Of diffusion
- Diffusion is faster as the food is hot
- The particles get more energy to move faster
- All are correct
General
✓✗If matter can flow, then it is in which physical state?
- Solid
- Liquid
- Gas
- Both liquid and gas
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
✓✗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