Two students Arpit and Rakshita are asked to arrange the apparatus to determine the boiling point of water. They arranged the apparatus as shown below by figures A and B respectively :
The digram in which the apparatus is correctly arranged is :
A only
B only
both A and B
neither A nor B
In which phenomena water changes into water vapour below its boiling point?
Evaporation
Condensation
Boiling
No such phenomena exist
In order to find the boiling point of water one of the precautions is that the bulb of the thermometer should not touch the sides of the beaker. This precaution is taken because:
sides of the beaker are at slightly higher temperature than 100°C.
sides of the beaker are at slightly lower temperature than 100°C.
the bulb of thermometer is likely to break.
none of the above.
The temperature at which a liquid starts boiling at the atmospheric pressure is known as its
Fusion point
Melting point
Boiling point
Sublimation temperature
Which one of the following figure describes the process?Solid vapours.
A
B
C
D
The phenomenon of change of a liquid into vapour at any temperature below its boiling point is called
Distillation
Filtration
Evaporation causes
Heating
Cooling
Freezing
The process in which a solid changes to liquid is known as
Fusion
For accurate measurement of melting point of ice one should take :
ice made of sea water
ice made of pond water
ice made of pure water
ice made of distilled water
It can flow and change shape
Liquids
Solids
Gases
Stones
