Advertisements
Advertisements
प्रश्न
What do you observe when :
solid ammonium chloride is heated
Advertisements
उत्तर
Solid ammonium chloride on heating changes into vapours (change of state) is physical change.
APPEARS IN
संबंधित प्रश्न
State whether the following is physical or chemical changes.
passing electric current through a heater rod —
State whether the following is physical or chemical changes.
Boiling of an egg —
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
Fill in the blank
An earthquake is a _______ change.
What role does energy play in initiating a chemical change ?
Give reason.
A dry handkerchief gets wet at once on dipping in water, but it takes longer for a wet handkerchief to dry.
Observe the picture containing a kettle and note that it has salt water in it and answer the following questions:

- What is name of the process that is done to the kettle?
- What will happen to the content of the kettle?
- What kind of change is occurring on the cold surface of the metal plate?
- What can you say about the quality of water that is obtained in the beaker?
The difference between initial state and the final state is called change.
______ is the process in which something becomes different from what it was earlier.
Cut vegetables turn brown when exposed to air, this is due to ______.
