EASY
10th Assam Board
IMPORTANT
Earn 100

Give reasons:

 Platinum, gold and silver are used to make jewellery. 

Important Questions on Metals and Non-metals

MEDIUM
10th Assam Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-metals>assam board-2018>Q 3

Food cans are coated with tin and not with zinc because

EASY
10th Assam Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-metals>assam board-2018>Q 4
Why do we apply paint on iron articles? 
EASY
10th Assam Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-metals>assam board-2018>Q 6

Give reasons:

Aluminium is a highly reactive metal. Yet it is used to make utensils for cooking. 

MEDIUM
10th Assam Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-metals>assam board-2018>Q 7

What is the refining of metals? Mention the most widely used method for refining impure metals. What is anode mud? 

EASY
10th Assam Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-metals>assam board-2018>Q 8

Explain, why:
Silver articles become black after some time when exposed to air. 

EASY
10th Assam Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-metals>assam board-2018>Q 9

Explain, why copper reacts with moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat. 

EASY
10th Assam Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-metals>assam board-2019>Q 10
What is the ductility of a metal?
MEDIUM
10th Assam Board
IMPORTANT
EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-metals>assam board-2019>Q 11

Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?