Pich the odd one out:

chemical change is also calles chemic reaction.
Lumps are formed when milk curdles.
Lactic acid is the acid preaent in milk.
When iron is exposed to air, iron changes its colour to brownish colour.

Pick the odd one out

other are are example of physical change whereas, it is an example of chemical change.

What is formed when milk curdles?

Curd

What does the picture define?

the picture depicts the changes.

The following image defines which type of change?

water added to sand and cement is a chemical reaction as it causes hardening of concrete through hydration.

The representation of the relation between the reactant, when there is more than one substance

+ is used to represent when there are more than one reactants in a reaction.

Which of the following acids are present in milk?

The real acidity in milk is due to lactic acid.

The relation between the reactants and products is represented by

The arrow shows the direction in which the reation occurs in a chemical reaction.

Which of the following is an example of chemical change?

cooking is an irreversible change and leads to formation of new products.

Iron rod changes its color as

iron rod changes its colour when exposed to air due to formation of rust whic is a chemical reaction.

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.

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.

Choose the correct option which suits the correct puzzle.

3. Chemical
1. Physical
4. Burning
2. Reaction