C7-L5-D7-USHNA-SCI-

Which of the following is a physical change?

• Rusting of iron

• Melting of ice

• Burning of paper

• Cooking of chapati

Tags

Medium

Quick

Vidhyarthi

L7F4Q

Describe_physical_changes

Explain why melting of ice is considered a physical change.

Tags

Moderate

Easy

Acharya

L6M9C

Identify_physical_changes_no_new_substances

Which observation best shows a chemical change?

• Water boiling

• Wax melting

• Wood burning

• Ice freezing

Tags

Medium

Quick

Vidhyarthi

L3T6Y

Recognize_irreversible_changes

If iron is left in moist air and rust forms, why is this a chemical change?

• The shape of iron changes

• A new substance (rust) is formed

• The iron becomes wet only

• The process is reversible

Tags

Medium

Moderate

Chanakya

L5B9S

List_properties_changing_during_changes

Match the type of change with its property:

• No new substance formed

• Physical change

• --

• --

• Often irreversible

• Chemical change

Tags

Moderate

L2K8Y

Differentiate_observable_vs_inferred_changes

Challenging

Maurya

Which statement is true?

• Both physical and chemical changes form new substances

• Both are always reversible

• Physical changes don’t form new substances; chemical changes do

• Physical changes always require heat

Tags

Medium

Quick

Vidhyarthi

L3H7N

Identify_recoverable_material

Which of these is a chemical change?

• Boiling water

• Cutting paper

• Curdling of milk

• Dissolving sugar in tea

Tags

Medium

Quick

Vidhyarthi

L3T6Y

Recognize_irreversible_changes

Which pair shows chemical changes?

• Water boiling & paper cutting

• Milk curdling & bread toasting

• Ice melting & water freezing

• Paper folding & glass breaking

Tags

Medium

Moderate

Acharya

L4D2K

Identify_reversible_physical_changes

Cutting paper into small pieces is a ____ change, while burning paper is a ____ change.

• Physical, Physical

• Chemical, Chemical

• Physical, Chemical

• Chemical, Physical

Tags

Quick

Vidhyarthi

Easy

L5P3X

Define_reversible_irreversible_changes

What changes during a physical change and what changes during a chemical change?

Tags

Medium

Moderate

Chanakya

L2K8Y

Differentiate_observable_vs_inferred_changes