Mention a change that is always desirable.

Important Questions on Physical and Chemical Changes

EASY

7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 2 - Physical and Chemical Changes>EXERCISE>Q 3

Mention a change that is always undesirable.

MEDIUM

7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 2 - Physical and Chemical Changes>EXERCISE>Q 3

Mention a change that is always periodic.

MEDIUM

7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 2 - Physical and Chemical Changes>EXERCISE>Q 4

Is burning a physical change or a chemical change? Why?

MEDIUM

7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 2 - Physical and Chemical Changes>EXERCISE>Q 5

A burning candle shows both physical and chemical changes. Explain.

MEDIUM

7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 2 - Physical and Chemical Changes>EXERCISE>Q 6

State three difference between evaporation and boiling.

MEDIUM

7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 2 - Physical and Chemical Changes>EXERCISE>Q 7

State four difference between physical and chemical change.

MEDIUM

7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 2 - Physical and Chemical Changes>EXERCISE>Q 8

What do you observe when water is boiled?

MEDIUM

7th ICSE

IMPORTANT

Concise Chemistry Middle School for Class 7>Chapter 2 - Physical and Chemical Changes>EXERCISE>Q 8

What do you observe when a piece of paper is burnt?