HARD
8th Maharashtra Board
IMPORTANT
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Write scientific reasons.

The stainless steel vessels in kitchen have copper coating on the bottom.

Important Questions on Metals and Nonmetals

HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 7 - Metals and Nonmetals>Exercises>Q 3

Write scientific reasons.

Copper and brass vessels are cleaned with lemon.

HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 7 - Metals and Nonmetals>Exercises>Q 3

Write scientific reasons.

Sodium metal is kept in kerosene.

HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 7 - Metals and Nonmetals>Exercises>Q 4
What is done to prevent corrosion of metals?
MEDIUM
8th Maharashtra Board
IMPORTANT
General Science>Chapter 7 - Metals and Nonmetals>Exercises>Q 4
What are the metals that make the alloys brass and bronze?
HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 7 - Metals and Nonmetals>Exercises>Q 4
What are the adverse effects of corrosion?
HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 7 - Metals and Nonmetals>Exercises>Q 4
What are uses of Noble metals?
HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 7 - Metals and Nonmetals>Exercises>Q 5

Three experiments to study the process of rusting are given below. Observe the three test tubes and answer the following question.

Question Image 

Why the nail in the test tube 2 is not rusted?

HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 7 - Metals and Nonmetals>Exercises>Q 5

Three experiments to study the process of rusting are given below. Observe the three test tubes and answer the following question.

Question Image 

Why is the nail in the test tube 1 is rusted highly?