Advertisements
Advertisements
प्रश्न
What do you observe when :
a spoon of sugar is heated in a pan
Advertisements
उत्तर
When a spoon of sugar is heated in a pan, black (charred sugar) (carbon) is seen. Is a chemical change.
APPEARS IN
संबंधित प्रश्न
State whether the following is physical or chemical changes.
passing electric current through a heater rod —
Tick (√) the correct alternative from the choice given for the following statement
Burning is a
Tick (√) the correct alternative from the choice given for the following statement
When sugar is heated, its colour changes into
True or false?
During a physical change energy is either given out or absorbed by the system.
Fill in the blank
An earthquake is a _______ change.
Melting of solid (wax) is a physical change.
What role does energy play in initiating a chemical change ?
Give reason.
While purchasing canned food, its expiry date should be checked.
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?
Cut vegetables turn brown when exposed to air, this is due to ______.
