General
✓✗
A gas can the liquefied by
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Applying high pressure
-
Lowering temperature
-
Both ‘applying high pressure’ and ‘lowering temperature’ are required
-
None of these
General
✓✗
The scientific name of particles which make up matter is
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Atom
-
Molecule
-
Both ‘atom’ and ‘molecule’
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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
✓✗Naphthalene balls disappear with time because
- They change in to liquid
- They are made by magicians
- They are sublime
- The insects eat them
General
✓✗Which of the following is considered as the fourth state of matter?
- Gas
- Plasma
- Liquid
- Bose-Einstein condensate
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 can be easily compressed because
- The particles of gas are very tiny
- The particles have least force of attraction between them
- The particles have maximum space between them
- The particles have low density
General
✓✗25°C =______ K
- 298
- 248
- 25
- None of these
General
✓✗
Which phenomenon tells us that particles of matter are constantly moving?
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Osmosis
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Diffusion
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Both ‘Osmosis’ and ‘Diffusion’
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None 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