Cutting of paper is reversible, but the burning of paper is a/an:

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.

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.

Match the following:

melting of ice-cream is a physical change.
Burning of paper is an irreversible change.
Baking of cookies is a chemical change.
Hair growth is a slow change.

Which one of the following is not an example of chemical change:

it is a physical reaction as it is reversible.

The substance which undergoes changes and a new substance is formed is known as:

Cbemical changes occur when a new substance combines with another to form a new substance.

Match the following:

(1) Cutting of paper	(a) Physical Change
(2) Curdling of milk	(b) Chemical change
(3) Burning of tree
(4) Boiling of water
(5) Rusting of iron

cutting of paper andboiling of water are physical changes as no new substance is formed.

The following picture defines which one of the following changes?