MEDIUM
7th CBSE
IMPORTANT
Earn 100

Name the brown flab substance formed on iron articles when exposed to moist air.

Important Questions on Physical and Chemical Changes

MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 6 - Physical and Chemical Changes>Exercise 6.2>Q I

Give one word for the following.

Rusting of iron can be prevented by ___________.

EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 6 - Physical and Chemical Changes>Exercise 6.2>Q I

Give one word for the following

Coating a layer of molten zinc on an object.

EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 6 - Physical and Chemical Changes>Exercise 6.2>Q I
Pure crystals can be obtained from their saturated solution.
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 6 - Physical and Chemical Changes>Exercise 6.2>Q I
A process in which a chemical change occurs is called _____. (physical reaction / chemical reaction)
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 6 - Physical and Chemical Changes>Exercise 6.2>Q I
A homogeneous mixture of two or more element in a definite composition is called _____.
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 6 - Physical and Chemical Changes>Exercise 6.2>Q I
A process of obtaining pure crystals of a substance from its saturated solution _____.
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 6 - Physical and Chemical Changes>Exercise 6.2>Q I
A process by which the surface of iron articles is coated with metals which are not attacked by moisture _____.
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 6 - Physical and Chemical Changes>Exercise 6.2>Q I
A process in which iron articles are coated with a layer of molten zinc is called _____.