Question
Iron rod changes its color as
- It is exposed to light
- It is exposed to air
- It reacts with water
- All the above
Hint:
It is exposed to air
The correct answer is: It is exposed to air
iron rod changes its colour when exposed to air due to formation of rust whic is a chemical reaction.
Related Questions to study
A chemical change is also called
A chemical change or chemical reaction is a process that occurs when two or more molecules collide with the right orientation and sufficient force to form a new product.
A chemical change is also called
A chemical change or chemical reaction is a process that occurs when two or more molecules collide with the right orientation and sufficient force to form a new product.
The melting of ice is one of the examples of physical change.
melting of ice is a physical change as it is reversible.
The melting of ice is one of the examples of physical change.
melting of ice is a physical change as it is reversible.
Which one of the following is not an example of irreversible change.
Which one of the following is not an example of irreversible change.
Curdling is a chemical change.
Blinking is a fast change.
Chopping is a physical change.
Burning paper is an irreversible change.
Curdling is a chemical change.
Blinking is a fast change.
Chopping is a physical change.
Burning paper is an irreversible change.
Choose the correct option which suits the correct puzzle.
3. Chemical
1. Physical
4. Burning
2. Reaction
Choose the correct option which suits the correct puzzle.
3. Chemical
1. Physical
4. Burning
2. Reaction
Select the following examples with respect to the physical change:
a. Melting
b. Rusting
c. Curdling
d. Blowing
e. Rotting
f. Chopping
g. Reaction
Select the following examples with respect to the physical change:
a. Melting
b. Rusting
c. Curdling
d. Blowing
e. Rotting
f. Chopping
g. Reaction
7.Chemical change is the change where a reaction happens and a new substance is formed.
8. Melting is the example of physical change.
9. Physical change is where no new substance is formed.
10. Rusting is the example of chemical change.
7.Chemical change is the change where a reaction happens and a new substance is formed.
8. Melting is the example of physical change.
9. Physical change is where no new substance is formed.
10. Rusting is the example of chemical change.
Match the following according to the changes given through the images:
1 is a chemical change
2 is a fast change
3 is a physical change.
Match the following according to the changes given through the images:
1 is a chemical change
2 is a fast change
3 is a physical change.
Pick the odd one out:
it is a slow change whereas, the others are example of fast change.
Pick the odd one out:
it is a slow change whereas, the others are example of fast change.
Pick the odd one out:
it is a chemical change whereas, the others are example of physical changes.
Pick the odd one out:
it is a chemical change whereas, the others are example of physical changes.
The substance where there is a change in the shape and size are known as:
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.
The substance where there is a change in the shape and size are known as:
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.
Cutting of paper is reversible, but the burning of paper is a/an:
burning of paper is an irreversible reaction.
Cutting of paper is reversible, but the burning of paper is a/an:
burning of paper is an irreversible reaction.
Which of the following is the example of fast reactions?
all the given pictures are an example of fast reactions.
Which of the following is the example of fast reactions?
all the given pictures are an example of fast reactions.
The image in the following defines what type of change?
Blowing of candles is a fast change.
The image in the following defines what type of change?
Blowing of candles is a fast change.
Chemical change is a change where a __________ substance is formed.
A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed.
Chemical change is a change where a __________ substance is formed.
A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed.
