Advertisements
Advertisements
Question
Fill in the blank with the correct word of the statement given below:
Sublimation is _______ a change of state of matter.
Solution
Sublimation is considered a change of state of matter.
APPEARS IN
RELATED QUESTIONS
Convert the temperature of 573 K to the Celsius scale.
What is the name of the process in which a solid turns directly into a gas ?
Name one property which is shown by ammonium chloride but not by sodium chloride.
Fill in the following blank with suitable words :
The state of matter called ........................ makes a fluorescent tube (or neon sign bulb) to glow.
Define 'melting point' of a substance ? What is the melting point of ice
What are the two ways in which the physical states of matter can be changed ?
When water is heated to a temperature x, it gets converted into steam at temperature x by a process called R. And when steam at temperature x is cooled, it gets reconverted into water at the same temperature x by a process called S.
- How much is the value of x in Kelvin ?
- What is the process R called ?
- What is the name of the energy absorbed during the process R ?
- What is process S known as ?
- What is the name of energy released during the process S known as ?\\
Define: cohesive force
Define the following terms: Diffusion
Why does a candle become smaller on burning with time?
Write whether the following statement is true or false:
All solids, on heating, first change to the liquid and then to the gaseous state always
Name the phenomenon which causes the following changes:
Formation of water vapour from water
The state of matter which has no definite shape or volume is called
Explain the term condensation
Explain the term freezing
Explain the term melting point
State which of the following statement is true or false. If false write the correct statement.
Atoms/molecules in gases move only about their own positions.
In the paragraph below, write ‘solid’, ‘liquid’ or ‘gas’ in each of the brackets depending on the substance referred to just before.
On a bright sunny day, Riya and Gargi are playing with a ball ( ) in the park. Gargi feels thirsty. So, Riya brings tender coconut water ( ) for her. At the same time, a strong breeze ( ) starts blowing and it also begins to rain ( ). They run back into the house ( ), change their clothes ( ), and then their mother gives them a cup ( ) of hot milk ( ) to drink.
Why does this happen?
Kerosene left open in a dish disappears.
Matter in any state is composed of small particles – molecules, atoms, or ions. Differentiate the terms above in Italics.
