Change of State
Trending Questions
- solid
- gaseous
- none of the above
- liquid
Melting point of ice_______________?
Match the column
Column 1 | Column 2 |
---|---|
melting |
solid to gas |
boiling |
gas to liquid |
freezing |
solid to liquid |
sublimation |
liquid to gas |
condensation |
liquid to solid |
Why is evaporation a surface phenomenon?
The temperature at which a gas starts changing into the liquid state is called as
Freezing point
Condensation point
Fusion point
Boiling point
The word "Fusion" is meant for
melting
freezing
heating
boiling
What do you mean by the changes of state? Write the flow chart showing the complete cycle of change of state.
What is the melting point of the solid?
Explain freezing on the basis of kinetic theory.
- evaporation
- condensation
- fusion
- deposition
The process of conversion of liquid into gas is called sublimation.
- True
- False
What are flammable and Non-flammable substances?
Molecules of each substance are identical.
- True
- False
When solid reach their melting point they become what?
Which of the following statement is incorrect?
The particles of matter are very, very small
The particles of matter attract one another
The particles of some of the matter are moving constantly
The particles of all the matter have spaces between them
Fill in the blank by choosing the correct word from the given options.
_______ state of matter consists of electrically charged particles of gaseous matter.
Incompressible
Plasma
Spaces
Any number
Volume
A pure substance consists of a single type of particle.
- True
- False
Write true or false for each statement :
(a) The temperature of a substance remains unaffected during its change of state.
(b) Ice melts at 100∘C.
(c) Water at 100∘C. has more heat than steam at 100∘C.
(d) Evaporation of a liquid causes cooling.
(e) Water evaporates only at 100∘C.
(f) Boiling takes place over the entire mass of the liquid.
(g) Evaporation takes place over the entire mass of the liqid.
(h) The process of a gas converting directly into solid is called vaporization.
(i) At high altitudes, water boils above 100∘C.
(j) The melting point of ice is 0∘C
How do the vaporisation point water and condensation point of steam compare numerically?
4. _______________ state of matter consists of electrically charged particles of gaseous matter.
The process by which a drop of ink spreads in a beaker of water.
The condensation point of steam is
What is the space between the molecules of a substance called?
Describe an activity to demonstrate that the particles of matter are constantly moving.
- Easily vapourising compounds
- Inflammable compounds
- Highly reactive compounds
- Compounds having low melting points
- liquefaction
- expansion
- evaporation
- the constant temperature at which a gas becomes liquid under normal pressure.
- the constant temperature at which a liquid changes into a solid by giving out heat energy.
- the constant temperature at which a solid becomes gas under normal pressure.
- the constant temperature at which a liquid changes into a gas by giving out heat energy.