Observe the given picture and answer the question that follows: Is the formation of iron sulphide on heating iron filings and sulphur powder a physical or a chemical change?

The formation of iron sulphide on heating iron filings and sulphur powder is a chemical change because: In chemical change, a new substance is formed. Here, iron sulphide formed is the new substance. In chemical change, absorption or evolution of heat takes place. In Figure B, the process is endothermic, which occurs in chemical change.

Observe the given picture and answer the questions that follow: Is the formation of iron sulphide a reversible or irreversible change?

The formation of iron sulphide is an irreversible change as the chemical composition of sulphur and iron participates in the formation of a new product, iron sulphide, which cannot be reversed back to sulphur powder and iron filings.

E M B I B E

ICSE Chemistry>Chapter 2 - Physical and Chemical Changes>TEST Yourself>Diagram based question

MEDIUM

8th ICSE

IMPORTANT

Earn 100

Observe the given picture and answer the questions that follow:

Which one of the above figures shows the occurrence of a physical change?

Important Questions on Physical and Chemical Changes

MEDIUM

8th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Physical and Chemical Changes>TEST Yourself>Diagram based question

Observe the given picture and answer the question that follows:
Question Image
Is the formation of iron sulphide on heating iron filings and sulphur powder a physical or a chemical change?

MEDIUM

8th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Physical and Chemical Changes>TEST Yourself>Diagram based question

Observe the given picture and answer the questions that follow:
Question Image
Is the formation of iron sulphide a reversible or irreversible change?

HARD

8th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Physical and Chemical Changes>THINK ZONE>Q (i)

Have you seen things made from clay? Clay is a type of soft earth that can be moulded into different shapes. When clay is baked, it becomes very hard. Is baking of clay a reversible or an irreversible change?

HARD

8th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Physical and Chemical Changes>THINK ZONE>Q (ii)

Formation of curd from milk is an irreversible change as you cannot get back milk from curd. Is this a physical or a chemical change?

HARD

8th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Physical and Chemical Changes>THINK ZONE>Q (iii)

Can you think of an irreversible physical change?